Indicates an immediate danger.
Death or serious injury may result if appropriate precautions are not taken.
Indicates a possibly dangerous situation.
Death or serious injury may result if appropriate precautions are not taken.
Indicates a situation where damage or injury could occur.
Minor injury or damage to property may result if appropriate precautions are not taken.
Indicates the possibility of flawed results and damage to the equipment.
Indicates an immediate danger.
Death or serious injury may result if appropriate precautions are not taken.
Indicates a possibly dangerous situation.
Death or serious injury may result if appropriate precautions are not taken.
Indicates a situation where damage or injury could occur.
Minor injury or damage to property may result if appropriate precautions are not taken.
Indicates the possibility of flawed results and damage to the equipment.
This manual contains important instructions for the inverter that must be followed during installation and maintenance of the inverter.
The inverter is designed and tested according to international safety requirements. Due to its electrical and electronic components, certain precautions must be taken when installing and operating the inverter.
In order to reduce the risk of injury to persons and to ensure safe installation and operation of the inverter, be sure to read these Operating Instructions carefully and follow all instructions and safety instructions.
Failure to observe the Operating Instructions and safety instructions can void the warranty and/or cause damage to the inverters or other property damage!
All electrical installations must be carried out in accordance with the National Electrical Code, ANSI/NFPA 70, and any other codes and regulations applicable to the installation site.
For installations in Canada, the installations must be done in accordance with applicable Canadian standards.
Danger from incorrect operation and work that is not carried out properly.
This can result in severe personal injury and damage to property.
Only qualified personnel are authorized to commission your inverter and only within the scope of the respective technical regulations.
Read the Installation Instructions and Operating Instructions before installing and commissioning the equipment.
Danger due to a ground fault. A normally grounded conductor can become ungrounded and live due to a ground fault.
An electric shock can be fatal.
A ground fault must be repaired before operation is resumed.
Danger of DC voltage from solar modules. When solar modules are grounded, the inverter's insulation monitoring is deactivated.
An electric shock can be fatal.
Ensure that grounded solar modules are double insulated according to Safety Class II.
Attach corresponding safety labels to the photovoltaic system where they can be seen easily.
Set the inverter so that an error message is displayed if the fuse trips.
Fire prevention
Danger from faulty or incorrect installations.
They may result in damage to inverters and other current-carrying components of a photovoltaic system.
Faulty or improper installation may cause overheating of cables and terminals as well as the formation of arcs. This could cause thermal damage, which in turn may lead to fires.
Please note the following when connecting the AC and DC cables:
Securely tighten all terminals using the proper torque listed in the Operating Instructions
Securely tighten all grounding terminals (PE/GND) using the proper torque listed in the Operating Instructions, even for free grounding terminals
Do not overload cables
Check cables for damage and correct wiring
Follow all Safety Instructions, Operating Instructions, and any local connection regulations
Always secure the inverter to the mounting bracket with fixing screws using the torque specified in the Operating Instructions.
Only start up the inverter with the fixing screws tightened.
Follow general ESD guidelines when handling option cards.
Fronius will not bear any costs for production downtimes, or for installations, etc., which may arise due to a detected electric arc and its consequences.
Fronius accepts no liability for fires which may break out despite integrated arc detection/interruption (e.g., due to a parallel arc).
Before an inverter can be reset following a detected electric arc, check the entire affected photovoltaic system for any damage.
The inverter is designed exclusively to be connected and used with nongrounded solar modules. The solar modules cannot be grounded at either the positive or negative pole.
The solar inverter is designed exclusively to convert direct current from solar modules into alternating current and feed this power into the public grid.The manufacturer is not responsible for any damage resulting from improper use.
All warranty claims are considered void in such cases.
When configuring the photovoltaic system, make sure that all photovoltaic system components are operating completely within their permitted operating range.
All measures recommended by the solar module manufacturer for maintaining solar module properties must be followed.
Utility company regulations regarding grid power feed must be followed.
Please observe the following criteria when choosing a location for the inverter:
The inverter is suitable for indoor installation. | |
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The inverter is suitable for outdoor installation. Because of its NEMA4X protection class, the inverter is not susceptible to hose water on any side and can also be operated in moist environments. | |
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In order to keep inverter heating as low as possible, do not expose the inverter to direct sunlight. The inverter should be installed in a protected location, e.g., near the solar modules or under an overhanging roof. | |
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Altitude above sea level: up to 13,123 ft. (4000 m) IMPORTANT! The inverter must not be installed or operated above an altitude of 13,123 ft (4000 m). | |
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Altitude above sea level: up to 11,811 ft. (3600 m) IMPORTANT! The inverter must not be installed or operated above an altitude of 11,811 ft (3600 m). | |
Do not install the inverter:
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During certain operating phases the inverter may produce a slight noise. For this reason it should not be installed in an occupied living area. | |
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Do not install the inverter in:
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The inverter is designed to be dust-proof in principle. However, in areas of high dust accumulation, the cooling surfaces can become dusty, which can impair the thermal performance. In this case, the dust must be removed regularly. We therefore recommend not installing the inverter in areas and environments with high dust accumulation. | |
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Do not install the inverter in:
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Please observe the following criteria when choosing a location for the inverter:
The inverter is suitable for indoor installation. | |
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The inverter is suitable for outdoor installation. Because of its NEMA4X protection class, the inverter is not susceptible to hose water on any side and can also be operated in moist environments. | |
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In order to keep inverter heating as low as possible, do not expose the inverter to direct sunlight. The inverter should be installed in a protected location, e.g., near the solar modules or under an overhanging roof. | |
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Altitude above sea level: up to 13,123 ft. (4000 m) IMPORTANT! The inverter must not be installed or operated above an altitude of 13,123 ft (4000 m). | |
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Altitude above sea level: up to 11,811 ft. (3600 m) IMPORTANT! The inverter must not be installed or operated above an altitude of 11,811 ft (3600 m). | |
Do not install the inverter:
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During certain operating phases the inverter may produce a slight noise. For this reason it should not be installed in an occupied living area. | |
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Do not install the inverter in:
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The inverter is designed to be dust-proof in principle. However, in areas of high dust accumulation, the cooling surfaces can become dusty, which can impair the thermal performance. In this case, the dust must be removed regularly. We therefore recommend not installing the inverter in areas and environments with high dust accumulation. | |
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Do not install the inverter in:
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The inverter is suitable for vertical installation on a vertical wall or column. | |
The inverter is suitable for a horizontal installation position. | |
The inverter is suitable for installation on a sloping surface. | |
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Do not install the inverter on a sloping surface with the connections upwards. | |
Do not install the inverter in a sloping position on a vertical wall or column. | |
Do not install the inverter in a horizontal position on a vertical wall or column. | |
Do not install the inverter with the connections upwards on a vertical wall or column. | |
Do not install the inverter overhanging with the connections upwards. | |
Do not install the inverter overhanging with the connections downwards. | |
Do not install the inverter on the ceiling. |
Please observe the following criteria when choosing a location for the inverter:
Only install on a solid, non-flammable surface | ||
Max. ambient temperatures: | ||
Relative humidity: | ||
The air flow direction within the inverter is from left and right to top (cold air intake on the left and right, hot air outflow at the top). | ||
When installing the inverter in a switch cabinet or similar closed environment, it is necessary to make sure that the hot air that develops will be dissipated by forced-air ventilation | ||
If you wish to install the inverter on the outer walls of a cattle shed, it is important to maintain a minimum clearance of 6 ft. 7 in. (2 m) between all sides of the inverter and air vents and other openings. |
Please observe the following criteria when choosing a location for the inverter:
Only install on a solid, non-flammable surface | ||
Max. ambient temperatures: | ||
Relative humidity: | ||
The air flow direction within the inverter is from right to top (cold air intake on the right, hot air outflow at the top). | ||
When installing the inverter in a switch cabinet or similar closed environment, it is necessary to make sure that the hot air that develops will be dissipated by forced-air ventilation | ||
If you wish to install the inverter on the outer walls of a cattle shed, it is important to maintain a minimum clearance of 6 ft. 7 in. (2 m) between all sides of the inverter and air vents and other openings. |
Danger of residual voltage from capacitors.
An electric shock can be fatal.
Wait until the capacitors have discharged. Discharge takes 3 minutes.
Danger due to insufficient ground conductor connection.
This can result in severe personal injury and damage to property.
The housing screws provide an adequate ground conductor connection for grounding the housing and should not be replaced under any circumstances by other screws that do not provide a reliable ground conductor connection.
Danger due to soiling or water on the terminals and contacts in the connection area.
The inverter may be damaged.
When drilling, make sure that terminals and contacts in the connection area do not become soiled or wet.
The mounting bracket without integrated inverter does not correspond to the degree of protection according to the data sheet. For this reason do not leave the mounting bracket exposed to environmental influences without the inserted inverter.
Protect the mounting bracket from soiling and moisture during installation.
Protection class NEMA4X is only ensured when the inverter is mounted and firmly screwed into the wall bracket.
The mounting bracket without inverter has no NEMA protection.
Danger of residual voltage from capacitors.
An electric shock can be fatal.
Wait until the capacitors have discharged. Discharge takes 3 minutes.
Danger due to insufficient ground conductor connection.
This can result in severe personal injury and damage to property.
The housing screws provide an adequate ground conductor connection for grounding the housing and should not be replaced under any circumstances by other screws that do not provide a reliable ground conductor connection.
Danger due to soiling or water on the terminals and contacts in the connection area.
The inverter may be damaged.
When drilling, make sure that terminals and contacts in the connection area do not become soiled or wet.
The mounting bracket without integrated inverter does not correspond to the degree of protection according to the data sheet. For this reason do not leave the mounting bracket exposed to environmental influences without the inserted inverter.
Protect the mounting bracket from soiling and moisture during installation.
Protection class NEMA4X is only ensured when the inverter is mounted and firmly screwed into the wall bracket.
The mounting bracket without inverter has no NEMA protection.
Danger of residual voltage from capacitors.
An electric shock can be fatal.
Wait until the capacitors have discharged. Discharge takes 3 minutes.
Danger due to insufficient ground conductor connection.
This can result in severe personal injury and damage to property.
The housing screws provide an adequate ground conductor connection for grounding the housing and should not be replaced under any circumstances by other screws that do not provide a reliable ground conductor connection.
Danger due to soiling or water on the terminals and contacts in the connection area.
The inverter may be damaged.
When drilling, make sure that terminals and contacts in the connection area do not become soiled or wet.
The mounting bracket without integrated inverter does not correspond to the degree of protection according to the data sheet. For this reason do not leave the mounting bracket exposed to environmental influences without the inserted inverter.
Protect the mounting bracket from soiling and moisture during installation.
Protection class NEMA4X is only ensured when the inverter is mounted and firmly screwed into the wall bracket.
The mounting bracket without inverter has no NEMA protection.
Important! Depending on the surface, different mounting materials may be required for installing the mounting bracket. These mounting materials are not part of the scope of delivery for the inverter. The installer is responsible for selecting the proper mounting materials.
For the installation of the inverter we recommend steel or aluminum screws with a diameter of 0.2–0.3 in. (6–8 mm).
When attaching the wall bracket to the wall or to a column, make sure that the wall bracket is not warped or deformed.
When mounted on metal supports, the inverter must not be exposed to rainwater or splashing water from the rear.
Provide suitable rainwater protection or splash water protection.
The mounting bracket must be secured in at least four places.
For installation of the inverter on a mast or beam, Fronius recommends using the "Pole clamp" (order no. SZ 2584.000) mast mounting kit from Rittal GmbH.
With the kit, the inverter can be mounted on a round or rectangular mast with the following diameter: Æ from 40 to 190 mm (round mast)
ÿ from 50 to 150 mm (rectangular mast)
Danger of short circuit from loose metal parts from knockouts.
Loose metal parts in the inverter may cause short circuits when the inverter is powered up. When removing knockouts, make sure that
no loose metal parts fall into the connection area of the inverter,
any metal pieces that do fall into the connection area are removed immediately.
When using the cable inlets at the back, take care to seal them according to protection class NEMA4X before operating outdoors.
When installing outdoors, only use waterproof conduit fittings and conduits.
Conduit fittings and conduits are not part of the scope of supply for the inverter.
Danger of short circuit from loose metal parts from knockouts.
Loose metal parts in the inverter may cause short circuits when the inverter is powered up. When removing knockouts, make sure that
no loose metal parts fall into the connection area of the inverter,
any metal pieces that do fall into the connection area are removed immediately.
When using the cable inlets at the back, take care to seal them according to protection class NEMA4X before operating outdoors.
When installing outdoors, only use waterproof conduit fittings and conduits.
Conduit fittings and conduits are not part of the scope of supply for the inverter.
The wall bracket contains several knockouts of different sizes. When knocked out, the openings are used for feeding in the various cables:
1/2 in. | for data communication cable (DATCOM) |
for Fronius Primo 3.8-8.2: | |
3/4 in. | for AC and DC cables |
for Fronius Primo 10.0-15.0: | |
3/4 in. - | for AC and DC cables |
* | A grounding electrode terminal (GET) may be required depending on local regulations. |
IMPORTANT! The knockouts on the rear of the wall bracket are made of metal.
IMPORTANT! The side knockouts and the knockouts on the underside of the wall bracket may be knocked out using a hammer or screwdriver, or drilled out using a step drill.
The knockouts at the back may only be drilled out using a step drill.
Use suitable eye protection when knocking/drilling out the knockouts. | |
| Only knock out knockouts using a hammer or screwdriver from the inside outwards. |
| Only use suitable step drills to drill out the knockouts. |
| Only drill out knockouts using a step drill from the outside inwards. |
| When drilling out using a step drill, ensure that the DC disconnector and the AC/DC connection block are not damaged. |
When drilling out the knockouts at the back, place the mounting bracket on an even surface with the back upwards so that shavings and pieces of metal can fall out of the mounting bracket. | |
| Attach appropriate conduits to all knocked/drilled out knockouts. |
Inverters can be operated on the following grids:
Inverters can be operated on the following grids:
Inverters can be operated on the following grids:
240 V: 120 V Stinger Setup: 240N, HI1 |
| Setup 240 V: 120 V Split phase Setup: 240N, CAL1, HI1 |
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208 V Delta - Corner Grounded * |
| 208 V Delta: 120 V WYE Setup: 208N, CAL2, HI2 |
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220 V Delta - Corner Grounded * Setup: 220 |
| 220 V Delta: 127 V WYE Setup: 220N |
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240 V Delta - Corner Grounded * Setup: 240, CAL5, HI5 |
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Danger from grid voltage and DC voltage from solar modules that are exposed to light.
An electric shock can be fatal.
Prior to any connection work, ensure that the inverter is de-energized on the AC side and the DC side.
The DC main switch is used only to switch off power to the power stage set. When the DC main switch is turned off, the connection area is still energized.
Maintenance and service work on the inverter power stage set should only be carried out by Fronius-trained service technicians.
All maintenance and service work should only be carried out when the inverter and the mounting bracket have been disconnected from each other.
The inverter must only be disconnected from the mounting bracket after being disconnected from the mains power.
Only an authorized electrician is permitted to connect this inverter to the public grid.
Inadequately sized electrical components can cause serious injury and damage to property.
An electric shock can be fatal.
All electrical connections must be established in accordance with the national standard (e.g., for the US National Electrical Code, ANSI/NFPA 70) and any other regulations applicable to the installation site.
Installations in Canada must be carried out in accordance with applicable Canadian standards.
Use min. 167°F (75°C) copper wire for all grounding wires (see NEC table 250.122).
Use for all AC/DC wires, min. 167°F (75°C).
Voltage drop and other considerations, such as improving power quality, may mean larger cable cross sections need to be used.
Use only solid or stranded wire. Do not use fine stranded wire.
Danger from work that is not carried out properly
This can result in severe personal injury and damage to property.
The surge protection device should only be installed and connected by licensed electricians.
Observe the safety rules!
Prior to any installation and connection work, ensure that the inverter is de-energized on the AC side and the DC side.
Danger due to improperly connected terminals.
This can result in thermal damage to the inverter, which can lead to fires.
When connecting the AC and DC cables, make sure that all terminals are tightened securely using the proper torque.
Fire hazard due to incorrectly designed AC fuse.
This can result in thermal damage to the inverter, which can lead to fires.
Only connect to a circuit provided with branch circuit overcurrent protection in accordance with the National Electrical Code, ANSI / NFPA 70.
Observe maximum values for branch circuit overcurrent protection.
When connecting aluminum cables:
Follow all national and international guidelines regarding the connection of aluminum cables.
Follow the instructions of the cable manufacturer, especially the note about whether an annual check to ensure that the cables are firmly attached should be performed.
Form a min. 4 in. (100 mm) cable loop with all cables.
To enable trouble-free operation of the inverter:
Make sure that the grid's neutral conductor is grounded. For insulated networks (without grounding), this is not the case, and operation of the inverter is not possible.
A neutral conductor is required for measurement purposes when operating the inverter. The neutral conductor must have a current carrying capacity of at least 1 A.
Danger from grid voltage and DC voltage from solar modules that are exposed to light.
An electric shock can be fatal.
Prior to any connection work, ensure that the inverter is de-energized on the AC side and the DC side.
The DC main switch is used only to switch off power to the power stage set. When the DC main switch is turned off, the connection area is still energized.
Maintenance and service work on the inverter power stage set should only be carried out by Fronius-trained service technicians.
All maintenance and service work should only be carried out when the inverter and the mounting bracket have been disconnected from each other.
The inverter must only be disconnected from the mounting bracket after being disconnected from the mains power.
Only an authorized electrician is permitted to connect this inverter to the public grid.
Inadequately sized electrical components can cause serious injury and damage to property.
An electric shock can be fatal.
All electrical connections must be established in accordance with the national standard (e.g., for the US National Electrical Code, ANSI/NFPA 70) and any other regulations applicable to the installation site.
Installations in Canada must be carried out in accordance with applicable Canadian standards.
Use min. 167°F (75°C) copper wire for all grounding wires (see NEC table 250.122).
Use for all AC/DC wires, min. 167°F (75°C).
Voltage drop and other considerations, such as improving power quality, may mean larger cable cross sections need to be used.
Use only solid or stranded wire. Do not use fine stranded wire.
Danger from work that is not carried out properly
This can result in severe personal injury and damage to property.
The surge protection device should only be installed and connected by licensed electricians.
Observe the safety rules!
Prior to any installation and connection work, ensure that the inverter is de-energized on the AC side and the DC side.
Danger due to improperly connected terminals.
This can result in thermal damage to the inverter, which can lead to fires.
When connecting the AC and DC cables, make sure that all terminals are tightened securely using the proper torque.
Fire hazard due to incorrectly designed AC fuse.
This can result in thermal damage to the inverter, which can lead to fires.
Only connect to a circuit provided with branch circuit overcurrent protection in accordance with the National Electrical Code, ANSI / NFPA 70.
Observe maximum values for branch circuit overcurrent protection.
When connecting aluminum cables:
Follow all national and international guidelines regarding the connection of aluminum cables.
Follow the instructions of the cable manufacturer, especially the note about whether an annual check to ensure that the cables are firmly attached should be performed.
Form a min. 4 in. (100 mm) cable loop with all cables.
To enable trouble-free operation of the inverter:
Make sure that the grid's neutral conductor is grounded. For insulated networks (without grounding), this is not the case, and operation of the inverter is not possible.
A neutral conductor is required for measurement purposes when operating the inverter. The neutral conductor must have a current carrying capacity of at least 1 A.
Cables with the following design can be connected to the AC and DC terminals of the inverter:
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Fronius Primo 3.8 - 8.2 |
| Fronius Primo 10.0 - 15.0 |
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Cu: min. AWG 14 – max. AWG 6 | Cu: min. AWG 14 – max. AWG 2 DC = AC ~ | |
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16 lbf.in / 1.33 t. lb. /1.8 Nm |
| AC ~ |
The AC-side terminals are designed for connecting single-wire, round aluminum cables. Due to the reaction of aluminum with air that creates a tough, non-conductive oxide layer the following points must be considered when connecting aluminum cables:
Always follow the instructions of the cable manufacturer when using aluminum cables.
Take into account local specifications when configuring cable cross sections.
Connection Requirements:
IMPORTANT! Do not use brushes, files, or sandpaper; aluminum particles may get stuck and can transfer to other cables.
IMPORTANT!Repeat the steps above whenever the cable is disconnected and then reconnected.
The resistance in the leads to the AC-side connection terminals must be as low as possible for optimal functioning of grid monitoring.
Fronius Primo 3.
8–8.2 only:
To ensure a proper ground connection, all 3 grounding terminals GND must be tightened with the specified torque during installation.
Loop the AC cables when connecting them to the AC terminals:
Fronius Primo 3.
8–8.2: min. 4 in. (102 mm)
Fronius Primo 10.0–15.0: in accordance with NEC
IMPORTANT! The ground conductor GND of the AC cable must be laid so that it is disconnected last.
Measure the ground conductor GND longer, for example, and loop.
If AC cables are laid over the shaft of the DC main switch or across the DC main switch connection block, the cables may be damaged when the inverter is pivoted or the inverter may not be able to be pivoted.
IMPORTANT! Do not lay AC cables over the shaft of the DC main switch or across the DC main switch connection block!
If excessively long AC or DC cables are laid in loops in the connection area, fix the cables to the designated eyelets at the top and bottom of the connection block using cable ties.
Fronius Primo 3.
8–8.2 only:
To ensure a proper ground connection, all 3 grounding terminals GND must be tightened with the specified torque during installation.
Loop the AC cables when connecting them to the AC terminals:
Fronius Primo 3.
8–8.2: min. 4 in. (102 mm)
Fronius Primo 10.0–15.0: in accordance with NEC
IMPORTANT! The ground conductor GND of the AC cable must be laid so that it is disconnected last.
Measure the ground conductor GND longer, for example, and loop.
If AC cables are laid over the shaft of the DC main switch or across the DC main switch connection block, the cables may be damaged when the inverter is pivoted or the inverter may not be able to be pivoted.
IMPORTANT! Do not lay AC cables over the shaft of the DC main switch or across the DC main switch connection block!
If excessively long AC or DC cables are laid in loops in the connection area, fix the cables to the designated eyelets at the top and bottom of the connection block using cable ties.
Inverter | Phases | Max. output | Max. fuse protection |
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Fronius Primo 3.8-1 208-240 | 1 / 2 | 3800 W | 63 A |
Fronius Primo 5.0-1 208-240 | 1 / 2 | 5000 W | 63 A |
Fronius Primo 6.0-1 208-240 | 1 / 2 | 6000 W | 63 A |
Fronius Primo 7.6-1 208-240 | 1 / 2 | 7600 W | 63 A |
Fronius Primo 8.2-1 208-240 | 1 / 2 | 8200 W | 63 A |
Fronius Primo 10.0-1 208-240 | 1 / 2 | 10,000 W | 100 A |
Fronius Primo 11.4-1 208-240 | 1 / 2 | 11,400 W | 100 A |
Fronius Primo 12.5-1 208-240 | 1 / 2 | 12,500 W | 100 A |
Fronius Primo 15.0-1 208-240 | 1 / 2 | 15,000 W | 100 A |
A residual current circuit breaker for the AC connecting cable may be required depending on local regulations, the power supply company as well as other conditions.
A type A residual current circuit breaker with a trip current of at least 100 mA is generally sufficient in this case. Nevertheless, false alarms can be triggered for the type A residual current circuit breaker in individual cases and depending on local conditions.
For this reason, Fronius recommends that you use a residual current circuit breaker suitable for a frequency converter.
Depending on the installation, an additional external AC and/or DC disconnect may be required if the inverter is installed in a location not easily accessible to utility or fire personnel. Contact your local authorities for additional information.
Danger from grid voltage and DC voltage from solar modules that are exposed to light.
An electric shock can be fatal.
Prior to any connection work, ensure that the inverter is de-energized on the AC side and the DC side.
The DC main switch is used only to switch off power to the power stage set. When the DC main switch is turned off, the connection area is still energized.
Maintenance and service work on the inverter power stage set should only be carried out by Fronius-trained service technicians.
All maintenance and service work should only be carried out when the inverter and the mounting bracket have been disconnected from each other.
The inverter must only be disconnected from the mounting bracket after being disconnected from the mains power.
Only an authorized electrician is permitted to connect this inverter to the public grid.
Inadequately sized electrical components can cause serious injury and damage to property.
An electric shock can be fatal.
All electrical connections must be established in accordance with the national standard (e.g., for the US National Electrical Code, ANSI/NFPA 70) and any other regulations applicable to the installation site.
Installations in Canada must be carried out in accordance with applicable Canadian standards.
Use min. 167°F (75°C) copper wire for all grounding wires (see NEC table 250.122).
Use for all AC/DC wires, min. 167°F (75°C).
Voltage drop and other considerations, such as improving power quality, may mean larger cable cross sections need to be used.
Use only solid or stranded wire. Do not use fine stranded wire.
Danger from work that is not carried out properly
This can result in severe personal injury and damage to property.
The surge protection device should only be installed and connected by licensed electricians.
Observe the safety rules!
Prior to any installation and connection work, ensure that the inverter is de-energized on the AC side and the DC side.
Danger due to incorrect or insufficient solar module grounding.
An electric shock can be fatal.
The inverter is designed for solar module grounding at the negative pole as standard. Solar module grounding is carried out via a GFDI fuse in the inverter.
When operating ungrounded solar modules, remove the GFDI fuse before starting operation and adjust the inverter grounding settings accordingly.
When operating solar modules with grounding at the positive pole, the solar modules are not grounded via the fuse in the inverter, but rather must be grounded externally to the inverter.
Danger due to improperly connected terminals.
This can result in thermal damage to the inverter, which can lead to fires.
When connecting the AC and DC cables, make sure that all terminals are tightened securely using the proper torque.
Danger due to overload on the inverter.
The inverter may be damaged.
Only connect a maximum of 20 A to each DC terminal.
Connect the DC+ and DC- cables to the correct DC+ and DC- terminals on the inverter.
Observe the maximum DC input voltage.
Do not connect the ground to the negative DC line at any point!
This is already done within the inverter. If negative DC lines are connected to the DC terminals or prior to this to the ground, this will circumvent the GFDI protection system, preventing your inverter from properly detecting a fault current. In addition, turning the DC disconnector to the "OFF"/open circuit condition will not disconnect the PV modules from ground, as it only disconnects the DC positive.
When connecting aluminum cables:
Follow all national and international guidelines regarding the connection of aluminum cables.
Follow the instructions of the cable manufacturer.
Perform an annual check to ensure that the cables are firmly attached according to the proper torque.
When connecting DC cables, ensure the polarity is correct.
Form a min. 4 in. (100 mm) cable loop with all cables.
To ground solar module frames or mounts, you must observe both the relevant instructions from the solar module manufacturer and national guidelines.
Danger from grid voltage and DC voltage from solar modules that are exposed to light.
An electric shock can be fatal.
Prior to any connection work, ensure that the inverter is de-energized on the AC side and the DC side.
The DC main switch is used only to switch off power to the power stage set. When the DC main switch is turned off, the connection area is still energized.
Maintenance and service work on the inverter power stage set should only be carried out by Fronius-trained service technicians.
All maintenance and service work should only be carried out when the inverter and the mounting bracket have been disconnected from each other.
The inverter must only be disconnected from the mounting bracket after being disconnected from the mains power.
Only an authorized electrician is permitted to connect this inverter to the public grid.
Inadequately sized electrical components can cause serious injury and damage to property.
An electric shock can be fatal.
All electrical connections must be established in accordance with the national standard (e.g., for the US National Electrical Code, ANSI/NFPA 70) and any other regulations applicable to the installation site.
Installations in Canada must be carried out in accordance with applicable Canadian standards.
Use min. 167°F (75°C) copper wire for all grounding wires (see NEC table 250.122).
Use for all AC/DC wires, min. 167°F (75°C).
Voltage drop and other considerations, such as improving power quality, may mean larger cable cross sections need to be used.
Use only solid or stranded wire. Do not use fine stranded wire.
Danger from work that is not carried out properly
This can result in severe personal injury and damage to property.
The surge protection device should only be installed and connected by licensed electricians.
Observe the safety rules!
Prior to any installation and connection work, ensure that the inverter is de-energized on the AC side and the DC side.
Danger due to incorrect or insufficient solar module grounding.
An electric shock can be fatal.
The inverter is designed for solar module grounding at the negative pole as standard. Solar module grounding is carried out via a GFDI fuse in the inverter.
When operating ungrounded solar modules, remove the GFDI fuse before starting operation and adjust the inverter grounding settings accordingly.
When operating solar modules with grounding at the positive pole, the solar modules are not grounded via the fuse in the inverter, but rather must be grounded externally to the inverter.
Danger due to improperly connected terminals.
This can result in thermal damage to the inverter, which can lead to fires.
When connecting the AC and DC cables, make sure that all terminals are tightened securely using the proper torque.
Danger due to overload on the inverter.
The inverter may be damaged.
Only connect a maximum of 20 A to each DC terminal.
Connect the DC+ and DC- cables to the correct DC+ and DC- terminals on the inverter.
Observe the maximum DC input voltage.
Do not connect the ground to the negative DC line at any point!
This is already done within the inverter. If negative DC lines are connected to the DC terminals or prior to this to the ground, this will circumvent the GFDI protection system, preventing your inverter from properly detecting a fault current. In addition, turning the DC disconnector to the "OFF"/open circuit condition will not disconnect the PV modules from ground, as it only disconnects the DC positive.
When connecting aluminum cables:
Follow all national and international guidelines regarding the connection of aluminum cables.
Follow the instructions of the cable manufacturer.
Perform an annual check to ensure that the cables are firmly attached according to the proper torque.
When connecting DC cables, ensure the polarity is correct.
Form a min. 4 in. (100 mm) cable loop with all cables.
To ground solar module frames or mounts, you must observe both the relevant instructions from the solar module manufacturer and national guidelines.
Danger from grid voltage and DC voltage from solar modules that are exposed to light.
An electric shock can be fatal.
Prior to any connection work, ensure that the inverter is de-energized on the AC side and the DC side.
The DC main switch is used only to switch off power to the power stage set. When the DC main switch is turned off, the connection area is still energized.
Maintenance and service work on the inverter power stage set should only be carried out by Fronius-trained service technicians.
All maintenance and service work should only be carried out when the inverter and the mounting bracket have been disconnected from each other.
The inverter must only be disconnected from the mounting bracket after being disconnected from the mains power.
Only an authorized electrician is permitted to connect this inverter to the public grid.
Inadequately sized electrical components can cause serious injury and damage to property.
An electric shock can be fatal.
All electrical connections must be established in accordance with the national standard (e.g., for the US National Electrical Code, ANSI/NFPA 70) and any other regulations applicable to the installation site.
Installations in Canada must be carried out in accordance with applicable Canadian standards.
Use min. 167°F (75°C) copper wire for all grounding wires (see NEC table 250.122).
Use for all AC/DC wires, min. 167°F (75°C).
Voltage drop and other considerations, such as improving power quality, may mean larger cable cross sections need to be used.
Use only solid or stranded wire. Do not use fine stranded wire.
Danger from work that is not carried out properly
This can result in severe personal injury and damage to property.
The surge protection device should only be installed and connected by licensed electricians.
Observe the safety rules!
Prior to any installation and connection work, ensure that the inverter is de-energized on the AC side and the DC side.
Danger due to incorrect or insufficient solar module grounding.
An electric shock can be fatal.
The inverter is designed for solar module grounding at the negative pole as standard. Solar module grounding is carried out via a GFDI fuse in the inverter.
When operating ungrounded solar modules, remove the GFDI fuse before starting operation and adjust the inverter grounding settings accordingly.
When operating solar modules with grounding at the positive pole, the solar modules are not grounded via the fuse in the inverter, but rather must be grounded externally to the inverter.
Danger due to improperly connected terminals.
This can result in thermal damage to the inverter, which can lead to fires.
When connecting the AC and DC cables, make sure that all terminals are tightened securely using the proper torque.
Danger due to overload on the inverter.
The inverter may be damaged.
Only connect a maximum of 20 A to each DC terminal.
Connect the DC+ and DC- cables to the correct DC+ and DC- terminals on the inverter.
Observe the maximum DC input voltage.
Do not connect the ground to the negative DC line at any point!
This is already done within the inverter. If negative DC lines are connected to the DC terminals or prior to this to the ground, this will circumvent the GFDI protection system, preventing your inverter from properly detecting a fault current. In addition, turning the DC disconnector to the "OFF"/open circuit condition will not disconnect the PV modules from ground, as it only disconnects the DC positive.
When connecting aluminum cables:
Follow all national and international guidelines regarding the connection of aluminum cables.
Follow the instructions of the cable manufacturer.
Perform an annual check to ensure that the cables are firmly attached according to the proper torque.
When connecting DC cables, ensure the polarity is correct.
Form a min. 4 in. (100 mm) cable loop with all cables.
To ground solar module frames or mounts, you must observe both the relevant instructions from the solar module manufacturer and national guidelines.
In order to select suitable solar modules and get the most efficient use out of the inverter, please note the following points:
Before connecting solar modules, make sure that the voltage specified by the manufacturer corresponds to the actual measured voltage.
Note the safety instructions and specifications of the solar module manufacturer regarding solar module grounding.
Only valid for the device types with the "Ecofuse" option:
The use of string fuses provides additional fuse protection for solar modules.
The maximum short circuit current ISC, the maximum module backfeed current IR, and the specification of the maximum string fuse value in the module data sheet of the respective solar module are decisive factors in the protection of the solar module.
The maximum short circuit current ISC per terminal is 15 A.
The string fuse release current can be set to greater than 15 A if required. However, a release current of 20 A must not be exceeded.
If the inverter is being operated with an external string collection box, the DC connector kit 25 (item numbers 42,0201,4479 for DC+ and 42,0201,4480 for DC-) must be used. In this case the solar modules are externally protected in the string collection box and the metal bolts should be used in the inverter.
National regulations regarding fuse protection must be observed. The electrical engineer carrying out the installation is responsible for the correct choice of string fuses.
Danger due to faulty fuses.
This can result in fire.
Only replace faulty fuses with new ones of the same rating.
The inverter is delivered with metal bolts as standard.
The inverter is designed exclusively to be connected and used with nongrounded solar modules.
The solar modules cannot be grounded at either the positive or negative pole.
IMPORTANT! Check the polarity and voltage of the solar module strings.
If DC cables are laid over the shaft of the DC main switch, or across the DC main switch connection block, they could be damaged when the inverter swivels in, or the inverter could be prevented from swiveling in.
IMPORTANT! Do not lay the DC cable over the DC main switch or across the DC main switch connection block.
Multi MPP Tracker inverters have two independent DC inputs (MPP Tracker). These inputs can be connected to a number of different modules.
Each MPP Tracker has 2 DC+ terminals. There are a total of four DC- terminals.
Connecting 2–4 strings in Multi MPP Tracker mode:
Connect the strings separately to the two MPP Tracker inputs (DC+1/DC+2). The DC- terminals can be used as desired, since they are connected internally.
Set MPP TRACKER 2 to "ON" when starting for the first time (also possible in the basic menu subsequently).
Single MPP Tracker mode on a Multi MPP Tracker inverter:
If the strings are connected with a string collection box and only one collective line is used for connection to the inverter, connection DC+1 (pin 2) and DC+2 (pin 1) must be bridged.
The cable cross section of the DC connecting line and bridging must be the same. Bridging the DC terminal is not necessary because it is bridged internally.
Set MPP TRACKER 2 to "OFF" when starting for the first time (also possible in the basic menu subsequently).
If the Multi MPP Tracker inverter is operated in Single MPP Tracker mode, the currents of the connected DC lines are distributed evenly across both inputs.
Single MPP Tracker mode with just one string on a Multi MPP Tracker inverter:
If only one string is used for connection to the inverter, connection DC+1 (pin 2) and DC+2 (pin 1) must be bridged.
The cable cross section of the DC connecting line and bridging must be the same. Bridging the DC terminal is not necessary because it is bridged internally.
Set MPP TRACKER 2 to "OFF" when starting for the first time (also possible in the basic menu subsequently).
If the Multi MPP Tracker inverter is operated in Single MPP Tracker mode, the currents of the connected DC lines are distributed evenly across both inputs.
Multi MPP Tracker inverters have 2 independent DC inputs (MPP Tracker). These inputs can be connected to a number of different modules.
MPP Tracker 1 has 4 DC+ terminals.
MPP Tracker 2 has 2 DC+ terminals.
There are a total of 6 DC- terminals.
Connecting 2-6 strings in Multi MPP Tracker mode:
Connect the strings separately to the two MPP Tracker inputs (DC+1/DC+2). The DC- terminals can be used as desired, since they are connected internally.
Set MPP TRACKER 2 to "ON" when starting for the first time (also possible in the basic menu subsequently).
IMPORTANT! The inverter must not be operated with one option card and 2 knocked-out option card slots.
In this case Fronius provides an appropriate dummy cover as an accessory:
42,0405,2020 ... for Fronius Primo 3.8–8.2
42,0405,2094 ... for Fronius Primo 10.0–15.0
IMPORTANT! If data communication cables are wired into the inverter, observe the following points:
IMPORTANT! The inverter must not be operated with one option card and 2 knocked-out option card slots.
In this case Fronius provides an appropriate dummy cover as an accessory:
42,0405,2020 ... for Fronius Primo 3.8–8.2
42,0405,2094 ... for Fronius Primo 10.0–15.0
IMPORTANT! If data communication cables are wired into the inverter, observe the following points:
The side areas of the housing cover are designed to function as carrying grips and/or handles.
The inverter is fitted with a lock for safety reasons, which allows the inverter to be pivoted in the wall bracket only when the DC main switch is off.
Only clip on and pivot the inverter in the wall bracket when the DC main switch is off.
Do not use excessive force to clip on the inverter and pivot it.
The fixing screws in the data communication area of the inverter are used to fix the inverter to the wall bracket. Fixing screws must be properly tightened to ensure correct contact between the inverter and the wall bracket.
Danger of damaging the inverter due to improperly tightened fixing screws.
Improperly tightened fixing screws may cause arcs to occur when the inverter is operated, which may lead to fire. Always tighten the fixing screws with the specified torque.
The side areas of the housing cover are designed to function as carrying grips and/or handles.
The inverter is fitted with a lock for safety reasons, which allows the inverter to be pivoted in the wall bracket only when the DC main switch is off.
Only clip on and pivot the inverter in the wall bracket when the DC main switch is off.
Do not use excessive force to clip on the inverter and pivot it.
The fixing screws in the data communication area of the inverter are used to fix the inverter to the wall bracket. Fixing screws must be properly tightened to ensure correct contact between the inverter and the wall bracket.
Danger of damaging the inverter due to improperly tightened fixing screws.
Improperly tightened fixing screws may cause arcs to occur when the inverter is operated, which may lead to fire. Always tighten the fixing screws with the specified torque.
Fronius Primo 3.8–8.2 only
An optional anti-theft device is included in the scope of delivery.
If required, the anti-theft device is installed before the inverter is screwed to the wall bracket.
To ensure that the fixing screws cannot fall out in the inverter's data communications area, these are fitted with a screw release.
To remove the fixing screw from the inverter
Mounting the Anti-Theft Device
IMPORTANT! Please refer to the instructions for attaching the inverter to the wall bracket.
Fronius Primo 3.8–8.2 only
An optional anti-theft device is included in the scope of delivery.
If required, the anti-theft device is installed before the inverter is screwed to the wall bracket.
To ensure that the fixing screws cannot fall out in the inverter's data communications area, these are fitted with a screw release.
To remove the fixing screw from the inverter
Mounting the Anti-Theft Device
IMPORTANT! Please refer to the instructions for attaching the inverter to the wall bracket.
A USB flash drive connected to the USB A socket can act as a data logger for an inverter.
The logging data that is saved on the USB flash drive can be viewed directly in third-party applications (e.g., Microsoft® Excel) at any time via the included CSV file.
Older Excel versions (up to Excel 2007) have a row limit of 65536.
A USB flash drive connected to the USB A socket can act as a data logger for an inverter.
The logging data that is saved on the USB flash drive can be viewed directly in third-party applications (e.g., Microsoft® Excel) at any time via the included CSV file.
Older Excel versions (up to Excel 2007) have a row limit of 65536.
If the USB stick is used as a datalogger, three files are automatically created:
(1) | USB root directory |
(2) | Fronius inverter (Fronius Galvo, Fronius Symo, Fronius Primo, or Fronius Eco) |
(3) | Inverter number – can be set in the setup menu under DATCOM |
If multiple inverters exist with the same inverter number, the three files are saved in the same folder. A number is appended to the file name (e.g., DALO_02.fld)
Structure of the CSV file:
(1) | ID |
(2) | Inverter no. |
(3) | Inverter type (DATCOM code) |
(4) | Logging interval in seconds |
(5) | Energy in watt-seconds with reference to the logging interval |
(6) | Inductive reactive power |
(7) | Capacitive reactive power |
(8) | Averages over the logging interval (AC voltage, AC current, DC voltage, DC current) |
(9) | Additional information |
One USB thumb drive with a memory capacity of 1 GB, for example, can record logging data at a logging interval of 5 minutes for approx. 7 years.
CSV file
CSV files can store only 65,535 rows (data records) (up to Microsoft® Excel version 2007, afterwards there is no limit).
At a logging interval of 5 minutes, the 65,535 rows are written within approx. 7 months (CSV data size of approx. 8 MB).
To avoid a loss of data, the CSV file should be backed up to a PC within these 7 months and deleted from the USB thumb drive. If the logging interval is set longer, this time frame is extended accordingly.
FLD file
The FLD file should not be larger than 16 MB. At a logging interval of 5 minutes, this corresponds to a storage duration of approx. 6 years.
If the file exceeds this 16 MB limit, it should be backed up to a PC, and all data should be deleted from the USB thumb drive.
After you have backed up the data and removed it from the USB thumb drive, the thumb drive should be immediately reinserted so that it can record logging data; no further steps are required.
Notice! A full USB thumb drive can lead to loss of data or overwriting of data. When inserting the USB thumb drive, make sure that it has a sufficient memory capacity.
Risk from a full USB thumb drive.
This can result in the loss of data or data being overwritten.
When inserting the USB thumb drive, make sure that it has a sufficient memory capacity.
If the USB flash drive is removed (e.g., to back up data), the logging data is written to a buffer memory in the inverter.
As soon as the USB flash drive is reinserted, the data is automatically transferred from the buffer memory to the USB flash drive.
The buffer memory can store a maximum of 6 logging points. Data is logged only during inverter operation (power greater than 0 W). The logging interval is set to 30 minutes. This results in a time span of 3 hours for recording data in the buffer memory.
When the buffer memory is full, the oldest data in the buffer memory is written over with the new data.
IMPORTANT! The buffer memory requires a constant power supply.
If there is an AC power outage during operation, all data in the buffer memory is lost. The automatic night switch-off must be deactivated so that data is not lost at night (set “Night Mode” setup parameter to ON – see the Operating Instructions for Datamanager 2.0 and the sections “Setting and Displaying Menu Items,” “Displaying and Setting Parameters in the ‘DATcom’ Menu Item”).
For Fronius Eco or Fronius Symo 15.0-3 208, the buffer memory also works with pure DC voltage.
Due to the number of USB thumb drives on the market, we cannot guarantee that every USB thumb drive will be recognized by the inverter.
Fronius recommends using only certified, industrial USB thumb drives (look for the USB-IF logo).
The inverter supports USB thumb drives using the following file systems:
Fronius recommends that the USB thumb drive only be used for recording logging data or for updating the inverter software. USB thumb drives should not contain any other data.
USB symbol on the inverter display, e.g., in the 'NOW' display mode:
When the inverter recognizes a USB thumb drive, the USB symbol will appear at the top right of the display.
When inserting the USB thumb drive, make sure that the USB symbol is displayed (it may also be flashing).
Notice! Please be aware that in outdoor applications the USB thumb drive may only function in a limited temperature range.
Make sure, for example, that the USB thumb drive will also function at low temperatures for outdoor applications.
The USB stick can be used to help end customers update inverter software via the USB menu item in the SETUP menu item: the update file is first saved on the USB stick and then transferred to the inverter. The update file must be saved in the USB stick root directory.
Safety information for removing a USB stick | ||
| IMPORTANT! To prevent a loss of data, the connected USB stick should only be removed under the following conditions:
|
Notice! For a horizontal installation position and installation outside: perform an annual check to ensure that all screw connections are tightly fastened.
Maintenance and service work may only be carried out by Fronius-trained service technicians.
Notice! For a horizontal installation position and installation outside: perform an annual check to ensure that all screw connections are tightly fastened.
Maintenance and service work may only be carried out by Fronius-trained service technicians.
Wipe the inverter, if necessary, with a damp cloth.
Do not use cleaning agents, scouring agents, solvents, or similar products to clean the inverter.
The inverter's serial number can be found on the rating plate on the bottom of the inverter.
The installation position may make it difficult to access or read the serial number, e.g. if the inverter has been installed in a dark or shaded area.
Two serial number stickers are enclosed with the Installation Instructions for the inverter:
* | 57 x 20 mm |
** | 67 x 20 mm |
The customer can attach these stickers themselves in a clearly visible place, e.g. on the front of the inverter or on the Operating Instructions.
Application example:
Serial number stickers on the Operating Instructions or on the front of the inverter
Australia only:
Affix DRM Australia sticker in Datamanager area.
The inverter's serial number can be found on the rating plate on the bottom of the inverter.
The installation position may make it difficult to access or read the serial number, e.g. if the inverter has been installed in a dark or shaded area.
Two serial number stickers are enclosed with the Installation Instructions for the inverter:
* | 57 x 20 mm |
** | 67 x 20 mm |
The customer can attach these stickers themselves in a clearly visible place, e.g. on the front of the inverter or on the Operating Instructions.
Application example:
Serial number stickers on the Operating Instructions or on the front of the inverter
Australia only:
Affix DRM Australia sticker in Datamanager area.