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.

Fire prevention

• Utilization for any other purpose, or in any other manner
• Alternations to the inverter are not expressly recommended by Fronius
• Installation of components that are not expressly recommended or sold by Fronius.

The manufacturer is not responsible for any damage resulting from improper use.
All warranty claims are considered void in such cases.

• carefully reading and obeying the instructions and all the safety and danger notices in the Operating and Installation Instructions
• compliance with the maintenance operations
• installation as specified in the Installation Instructions

When configuring the photovoltaic system, make sure that all 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.

Follow all grid operator regulations regarding grid power feed and connection methods.

Please observe the following criteria when choosing a location for the inverter:

	The inverter is suitable for indoor installation.
	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.
	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.
	Altitude above sea level: up to 11,482 ft. (3500 m) IMPORTANT! The inverter must not be installed or operated above an altitude of 11,482 ft (3500 m). The max. permissible DC voltage of the inverter depends on the altitude: 0 - 6561 ft. (0 - 2000 m) ... UDC max = 550 V > 6561 - 8202 ft. (> 2000 - 2500 m) ... UDC max = 540 V > 8202 - 9842 ft. (> 2500 - 3000 m) ... UDC max = 480 V > 9842 - 11,482 ft. (> 3000 - 3500 m) ... UDC max = 430 V The output power reduces when the device temperature is too high, and this may occur earlier than normal at increased altitudes.
	Do not install the inverter: Where it may be exposed to ammonia, corrosive gases, acids, or salts (e.g., fertilizer storage areas, vent openings for livestock stables, chemical plants, tanneries)
	During certain operating phases the inverter may produce a slight noise. For this reason it should not be installed in an occupied living area.
	Do not install the inverter in: Areas where there is an increased risk of accidents from farm animals (horses, cattle, sheep, pigs, etc.) Stables or adjoining areas Storage areas for hay, straw, chaff, animal feed, fertilizers, etc.
	Do not install the inverter in: Dusty rooms and environments Rooms and areas with large amounts of conductive dust particles (e.g., iron filings)
	Do not install the inverter in: Greenhouses Storage or processing areas for fruit, vegetables, or viticulture products Areas used in the preparation of grain, green fodder, or animal feeds

Please observe the following criteria when choosing a location for the inverter:

	The inverter is suitable for indoor installation.
	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.
	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.
	Altitude above sea level: up to 11,482 ft. (3500 m) IMPORTANT! The inverter must not be installed or operated above an altitude of 11,482 ft (3500 m). The max. permissible DC voltage of the inverter depends on the altitude: 0 - 6561 ft. (0 - 2000 m) ... UDC max = 550 V > 6561 - 8202 ft. (> 2000 - 2500 m) ... UDC max = 540 V > 8202 - 9842 ft. (> 2500 - 3000 m) ... UDC max = 480 V > 9842 - 11,482 ft. (> 3000 - 3500 m) ... UDC max = 430 V The output power reduces when the device temperature is too high, and this may occur earlier than normal at increased altitudes.
	Do not install the inverter: Where it may be exposed to ammonia, corrosive gases, acids, or salts (e.g., fertilizer storage areas, vent openings for livestock stables, chemical plants, tanneries)
	During certain operating phases the inverter may produce a slight noise. For this reason it should not be installed in an occupied living area.
	Do not install the inverter in: Areas where there is an increased risk of accidents from farm animals (horses, cattle, sheep, pigs, etc.) Stables or adjoining areas Storage areas for hay, straw, chaff, animal feed, fertilizers, etc.
	Do not install the inverter in: Dusty rooms and environments Rooms and areas with large amounts of conductive dust particles (e.g., iron filings)
	Do not install the inverter in: Greenhouses Storage or processing areas for fruit, vegetables, or viticulture products Areas used in the preparation of grain, green fodder, or animal feeds

Please observe the following criteria when choosing a location for the inverter:

Only install on a solid, non-flammable surface
	Max. ambient temperatures: -40°F to +122°F (-40°C to +50°C)
	Relative humidity: 0 - 100%
	The air flow direction within the inverter is from left to top (cold air intake on the left, hot air outflow at the top). The waste air can reach a temperature of 70°C.
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 cattle stables, it is important to keep a minimum clearance of 2 m between all sides of the inverter and air vents and other openings. The place of installation should not be exposed to ammonia, corrosive gases, salts, or acids.

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.

The mounting bracket must be secured in at least four places.

1

The wall bracket contains several knockouts of different sizes. When knocked out, the openings are used for feeding in the various cables:

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. Do not use spiral drills for drilling out!
	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. In the event of installation outside, only use watertight conduits and conduit fittings. Conduits and conduit fittings are not included with the inverter.

Inverters can be operated on the following grids:

• 208 V Delta, without neutral conductor
• 208 V Delta: 120 V WYE, with neutral conductor
• 220 V Delta, without neutral conductor
• 220 V Delta: 127 V WYE, with neutral conductor
• 240 V Delta, without neutral conductor
• 240 V: 120 V WYE, with neutral conductor
• 240 V: 120 V split phase, with neutral conductor

Inverters can be operated on the following grids:

• 208 V Delta, without neutral conductor
• 208 V Delta: 120 V WYE, with neutral conductor
• 220 V Delta, without neutral conductor
• 220 V Delta: 127 V WYE, with neutral conductor
• 240 V Delta, without neutral conductor
• 240 V: 120 V WYE, with neutral conductor
• 240 V: 120 V split phase, with neutral conductor

Inverters can be operated on the following grids:

• 208 V Delta, without neutral conductor
• 208 V Delta: 120 V WYE, with neutral conductor
• 220 V Delta, without neutral conductor
• 220 V Delta: 127 V WYE, with neutral conductor
• 240 V Delta, without neutral conductor
• 240 V: 120 V WYE, with neutral conductor
• 240 V: 120 V split phase, with neutral conductor

Cables with the following design can be connected to the AC and DC terminals of the inverter:

Copper or aluminum: round, solid Copper: round, fine-stranded, up to conductor class 4 Cable cross-sections: Cu: min. AWG 14 – max. AWG 6 Al: AWG 6 Tightening torque of the terminals: 16 lbf.in / 1.33 t. lb. /1.8 Nm

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:

• Reduced rated currents for aluminum cables
• The connection requirements listed below

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.

IMPORTANT! The GND ground conductor of the AC cable must be laid so that this is the last to be disconnected.
Cut GND ground conductors longer, for example, and make them into a loop.

If AC 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 AC cable over the DC main switch or across the DC main switch connection block.

Example: AC cable

If long AC or DC cables are laid in the connection area in cable loops, fix the cables to the lugs designed for this purpose on the top and bottom of the connection block using cable ties.

IMPORTANT! The GND ground conductor of the AC cable must be laid so that this is the last to be disconnected.
Cut GND ground conductors longer, for example, and make them into a loop.

If AC 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 AC cable over the DC main switch or across the DC main switch connection block.

Example: AC cable

If long AC or DC cables are laid in the connection area in cable loops, fix the cables to the lugs designed for this purpose on the top and bottom of the connection block using cable ties.

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.

The inverter comes with a GFDI fuse for negatively grounded solar modules as standard.

CAUTION when using ungrounded solar modules!

For ungrounded solar modules:

• Remove the GFDI fuse
• Adjust the grounding settings in the BASIC menu

Fuse holder for solar module ground at the negative pole

The fuse holder for the grounding of the solar modules is located on the reverse of the inverter.

The inverter may also be operated with solar modules which require grounding on the positive pole.

IMPORTANT! The grounding of the solar modules on the positive pole does not work via the fuse in the inverter, and instead must be carried out via a separate fuse outside of the inverter. The GFDI monitoring of the inverter remains in place.

Solar module ground at positive pole

For solar modules grounded on the positive pole:

• Remove the GFDI fuse in the inverter
• Install GFDI fuse outside of the inverter
• Adjust the grounding settings in the BASIC menu

The inverter comes with a GFDI fuse for negatively grounded solar modules as standard.

CAUTION when using ungrounded solar modules!

For ungrounded solar modules:

• Remove the GFDI fuse
• Adjust the grounding settings in the BASIC menu

Fuse holder for solar module ground at the negative pole

The fuse holder for the grounding of the solar modules is located on the reverse of the inverter.

The inverter may also be operated with solar modules which require grounding on the positive pole.

IMPORTANT! The grounding of the solar modules on the positive pole does not work via the fuse in the inverter, and instead must be carried out via a separate fuse outside of the inverter. The GFDI monitoring of the inverter remains in place.

Solar module ground at positive pole

For solar modules grounded on the positive pole:

• Remove the GFDI fuse in the inverter
• Install GFDI fuse outside of the inverter
• Adjust the grounding settings in the BASIC menu

The inverter comes with a GFDI fuse for negatively grounded solar modules as standard.

CAUTION when using ungrounded solar modules!

For ungrounded solar modules:

• Remove the GFDI fuse
• Adjust the grounding settings in the BASIC menu

Fuse holder for solar module ground at the negative pole

The fuse holder for the grounding of the solar modules is located on the reverse of the inverter.

The inverter may also be operated with solar modules which require grounding on the positive pole.

IMPORTANT! The grounding of the solar modules on the positive pole does not work via the fuse in the inverter, and instead must be carried out via a separate fuse outside of the inverter. The GFDI monitoring of the inverter remains in place.

Solar module ground at positive pole

For solar modules grounded on the positive pole:

• Remove the GFDI fuse in the inverter
• Install GFDI fuse outside of the inverter
• Adjust the grounding settings in the BASIC menu

In order to select suitable solar modules and get the most efficient use out of the inverter, please note the following points:

• The open circuit voltage of the solar modules increases as the temperature decreases (assuming constant irradiance). The open circuit voltage must not exceed the following values depending on the altitude:
  0–6561 ft. (0–2000 m) ... UDC max = 550 V
  > 6561–8202 ft. (> 2000–2500 m) ... UDC max = 540 V
  > 8202–9842 ft. (> 2500–3000 m) ... UDC max = 480 V
  > 9842 –11482 ft. (> 3000–3500 m) ... UDC max = 430 V
  
  Open circuit voltage which exceeds the given values will damage the inverter and void all warranty entitlements.
  
• Note the temperature coefficients in the solar module data sheet.
• More exact data for sizing the solar modules can be obtained using calculation tools such as the Fronius Configuration Tool (available at http://www.solarweb.com).
• See NEC table 690.7 for the appropriate code-related voltage adjustment factor for crystalline silicon modules, or use the manufacturer’s specified voltage coefficient.

IMPORTANT! Check the polarity and voltage of the solar module strings. The difference between the individual solar module strings may not exceed 10 V.

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.

IMPORTANT! Inverters may not be operated with an option card and two broken-out option card divisions.
In this case, a corresponding blanking cover (42,0405,2020) is optionally available from Fronius.

IMPORTANT! If data communication cables are to be used in the inverter, please note the following points:

• provide your own conduits for the data communication cables
• lay the communication cable in the supplied protective hose
• knock out the corresponding opening
• clean the knocked out opening
• insert the supplied cable bushing into the opening (if both openings have been knocked out, an additional cable bushing 42,0405,2019 is required)
• clip the inverter in the wall bracket
• insert the data communication cable through the cable bushing from the back
• when swiveling the inverter into place, ensure that the cables are not kinked, trapped, or damaged in any other way do not form any loops with the data communication cables
• lay data communication cables in the inverter data communication area and connect to the Solar Net connection sockets "IN" and "OUT,"
  insert the termination plugs in the remaining Solar Net connection sockets.

IMPORTANT! Inverters may not be operated with an option card and two broken-out option card divisions.
In this case, a corresponding blanking cover (42,0405,2020) is optionally available from Fronius.

IMPORTANT! If data communication cables are to be used in the inverter, please note the following points:

• provide your own conduits for the data communication cables
• lay the communication cable in the supplied protective hose
• knock out the corresponding opening
• clean the knocked out opening
• insert the supplied cable bushing into the opening (if both openings have been knocked out, an additional cable bushing 42,0405,2019 is required)
• clip the inverter in the wall bracket
• insert the data communication cable through the cable bushing from the back
• when swiveling the inverter into place, ensure that the cables are not kinked, trapped, or damaged in any other way do not form any loops with the data communication cables
• lay data communication cables in the inverter data communication area and connect to the Solar Net connection sockets "IN" and "OUT,"
  insert the termination plugs in the remaining Solar Net connection sockets.

The side areas of the housing lid are designed to function as carrying grips and/or handles.

NOTE!

For safety reasons, the inverter is fitted with a locking mechanism, which only allows the inverter to be swiveled into the wall bracket when the DC main switch is switched off.

 

Only swivel and clip the inverter into the wall bracket when the DC main switch is switched off.

Do not apply force when swiveling and clipping the inverter in.

The fixing screws in the inverter data communication area are to be used to fix the inverter to the wall bracket. Fixing screws must be properly tightened to ensure correct contact between the inverter and wall bracket.

The side areas of the housing lid are designed to function as carrying grips and/or handles.

NOTE!

For safety reasons, the inverter is fitted with a locking mechanism, which only allows the inverter to be swiveled into the wall bracket when the DC main switch is switched off.

 

Only swivel and clip the inverter into the wall bracket when the DC main switch is switched off.

Do not apply force when swiveling and clipping the inverter in.

The fixing screws in the inverter data communication area are to be used to fix the inverter to the wall bracket. Fixing screws must be properly tightened to ensure correct contact between the inverter and wall bracket.

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

• Push the fixing screw upwards from the other side e.g. using needle-nose pliers
• Undo the fixing screw

Installing the Anti-Theft Device

IMPORTANT! Please refer to the instructions for attaching the inverter to the wall bracket.

1Swing the inverter out

2Push the fixing screw upwards from the other side e.g. using needle-nose pliers

3Undo the fixing screw

4Insert the fixing screw into the anti-theft device

5Insert the anti-theft device plus fixing screw into the inverter

6Swing the inverter in

7Tighten both fixing screws to the specified torque

8Fit the padlock to the anti-theft device

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

• Push the fixing screw upwards from the other side e.g. using needle-nose pliers
• Undo the fixing screw

Installing the Anti-Theft Device

IMPORTANT! Please refer to the instructions for attaching the inverter to the wall bracket.

1Swing the inverter out

2Push the fixing screw upwards from the other side e.g. using needle-nose pliers

3Undo the fixing screw

4Insert the fixing screw into the anti-theft device

5Insert the anti-theft device plus fixing screw into the inverter

6Swing the inverter in

7Tighten both fixing screws to the specified torque

8Fit the padlock to the anti-theft device

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:

• FRONIUS.sys system file:
  This file saves information from the inverter that is irrelevant to the customer. The file must not be deleted individually. Only delete all files together (sys, fld, csv).
  
• DALO.fld log file:
  Log file for reading out data in Fronius Solar.access.
  
  You can find additional information on the Fronius Solar.access Software in the "DATCOM Detail" operating instructions at http://www.fronius.com
  
• DATA.csv log file:
  A log file for reading out data in a spreadsheet program (e.g., Microsoft® Excel)

Data structure on the USB stick

(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:

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.

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:

• FAT12
• FAT16
• FAT32

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.

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.