Fire prevention

Note! Fronius will not accept any costs associated with production downtimes, installer costs, etc., that may arise as the result of a detected arc and its consequences. Fronius accepts no liability for fires that can occur despite the presence of the integrated arc detection/extinguishing system (e.g. fires caused by a parallel arc).

Note! After an arc has been detected, the entire photovoltaic system must be checked for possible damage before resetting the inverter.

Observe the manufacturer's connection, installation and operating instructions at all times. To reduce the hazard potential to a minimum, perform all installation and connection work carefully according to the instructions and regulations.
Refer to the device Installation Instructions for the tightening torques to be used at the relevant terminal connections.

• Any use above and beyond this purpose
• Making any modifications to the inverter that have not been expressly approved by Fronius
• the installation of components that are not distributed or expressly approved by Fronius.

Fronius shall not be liable for any damage resulting from such action.
No warranty claims will be entertained.

• Carefully reading and obeying all the instructions and all the safety and danger notices in the Operating Instructions and Installation Instructions
• Performing all stipulated maintenance work
• Installation as specified in the Installation Instructions

When designing the photovoltaic system, ensure that all components are operated within their permitted operating ranges at all times.

Observe all the measures recommended by the solar module manufacturer to ensure that the solar module retains its properties in the long term.

Obey the regulations of the power supply company regarding connection methods and energy fed into the grid.

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

Only install on a solid, non-flammable surface
	Max. ambient temperatures: -25 °C / +50 °C
	Relative humidity: 0-100%
	The airflow within the inverter is from the left to the top (cold air taken in from the left, hot air dissipated out of the top). The exhaust air can reach a temperature of 70 °C.
The environmental conditions of the inverter must be maintained at the installation location.
If the inverter is to be installed on the outer wall of a cattle shed, maintain a minimum all-round clearance of 2 m between the inverter and all ventilation and other openings in the building. The installation location must not be exposed to ammonia, corrosive vapours, salts or acids.

• the inverter is placed in the mounting bracket and permanently attached using screws，
• the cover for the data communication area is permanently attached to the inverter with screws.

Degree of protection IP 20 applies to the mounting bracket with no inverter and the venting duct.

• the inverter is placed in the mounting bracket and permanently attached using screws，
• the cover for the data communication area is permanently attached to the inverter with screws.

Degree of protection IP 20 applies to the mounting bracket with no inverter and the venting duct.

Important! Different fixings may be required to fit the mounting bracket depending on the type of underlying surface. Fixings are therefore not included in the scope of supply of the inverter. The installer is responsible for selecting the right type of fixing.

To install the inverter, the manufacturer recommends the use of steel or aluminium screws with a diameter of 6 - 8 mm.

Note! When fitting the mounting bracket to the wall, ensure that the mounting bracket does not become warped or deformed.

The mounting bracket must be affixed at a minimum of four points.

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IMPORTANT! To ensure a proper ground connection, all three PE grounding terminals must be tightened to the specified torque when the inverter is installed.

IMPORTANT! To ensure a proper ground connection, all three PE grounding terminals must be tightened to the specified torque when the inverter is installed.

To provide the best possible grid monitoring, the resistance in the leads to the AC-side terminals should be as low as possible.

PE	Ground conductor / earthing
L1	Phase conductor
N	Neutral conductor

Max. cross-section of each conductor cable:
16 mm²

Min. cross-section of each conductor cable:
in accordance with the fuse rating on the AC side, but at least 2.5 mm²

The AC cables can be connected to the AC terminals without ferrules.

IMPORTANT! When using ferrules for AC cables with a cross-section of 16 mm², the ferrules must be crimped with a right-angled cross-section.
The use of ferrules with insulating collars is only permitted up to a max. cable cross-section of 10 mm².

The following types of AC cable can be connected to the AC terminals of the inverter:

Copper or aluminium: solid round conductor Copper: fine-stranded round conductor, up to conductor class 4

The AC-side terminals are suitable for connecting single-wire, round aluminium cables. Because of the formation of a non-conductive oxide layer due to the reaction of aluminium with air, the following points must be considered when connecting aluminium cables:

• the reduced rated currents for aluminium cables
• the connection conditions listed below

Always follow the cable manufacturer instructions when using aluminium cables.

When designing cable cross-sections, take local regulations into account.

Connection conditions:

IMPORTANT! Do not use brushes, files or emery paper, as the aluminium particles get trapped and can be transferred to other conductors.

IMPORTANT!Repeat the procedure if the cable has been disconnected and is to be re-connected.

• Ensure that the grid neutral conductor is grounded. This may not be the case for IT grids (insulated grids with no grounding); it will then not be possible to use the inverter.
• In order to use the inverter, the neutral conductor must be connected. A neutral conductor that is too small may adversely affect the inverter feeding energy into the grid. The neutral conductor must therefore be the same size as the other live conductors.

• Form loops with the AC cables when connecting them to the AC terminals.
• When securing the AC cables using a metric screw joint, ensure that the loops do not protrude beyond the connection area.
  Otherwise, under certain circumstances it may no longer be possible to close the inverter.

IMPORTANT! The PE ground conductor of the AC cable must be laid in such a way that it is the last to be disconnected in the event that the strain-relief device should fail.
This can be ensured, for example, by making it somewhat longer and by laying it in a loop.

If AC cables are laid over the shaft of the DC main switch or across the connection block of the DC main switch, they may be damaged when the inverter is swung in, or they may even prevent the inverter from being swung in.

IMPORTANT! Do not lay AC cables over the shaft of the DC main switch or across the connection block of the DC main switch.

If overlength AC or DC cables are to be laid in loops in the connection area, attach the cables with cable ties to the eyelets provided on the top and bottom of the connection block.

NOTE! If solar modules are grounded by a built-in grounding protection device in the inverter, they will not be grounded if the DC main switch is in the OFF position.

• Observe national and international guidelines regarding the connection of aluminium cables
• Follow the instructions of the cable manufacturer.
• Check every year that the cables are securely attached in accordance with the specified torque.

NOTE! The solar modules connected to the inverter must comply with the IEC 61730 Class A standard.

NOTE! When photovoltaic modules are exposed to light, they supply current to the inverter.

NOTE! Ensure the polarity is correct when connecting the DC cables.

NOTE! For grounding solar module frames or racks, the relevant specifications from the solar module manufacturer must be taken into account along with national guidelines.

NOTE! If the inverter is installed in Australia or New Zealand (required standard: AS4777.2:2020), the following applies:

• Functional grounding isnot permitted
• The inverter must not be used as part of a three-phase combination, as there is no communication link between the inverters

NOTE! If solar modules are grounded by a built-in grounding protection device in the inverter, they will not be grounded if the DC main switch is in the OFF position.

• Observe national and international guidelines regarding the connection of aluminium cables
• Follow the instructions of the cable manufacturer.
• Check every year that the cables are securely attached in accordance with the specified torque.

NOTE! The solar modules connected to the inverter must comply with the IEC 61730 Class A standard.

NOTE! When photovoltaic modules are exposed to light, they supply current to the inverter.

NOTE! Ensure the polarity is correct when connecting the DC cables.

NOTE! For grounding solar module frames or racks, the relevant specifications from the solar module manufacturer must be taken into account along with national guidelines.

NOTE! If the inverter is installed in Australia or New Zealand (required standard: AS4777.2:2020), the following applies:

• Functional grounding isnot permitted
• The inverter must not be used as part of a three-phase combination, as there is no communication link between the inverters

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). Open circuit voltage may not exceed the following values:
  Fronius Galvo 1.5-1 ... 420 V
  Fronius Galvo 2.0-1 ... 420 V
  Fronius Galvo 2.5-1 ... 550 V
  Fronius Galvo 3.0-1 ... 550 V
  Fronius Galvo 3.1-1 ... 550 V
  If the open circuit voltage exceeds the above mentioned values, the inverter may be damaged, and all warranty rights will become null and void.
  
• Note the temperature coefficients in the solar module data sheet
• More exact data for sizing the solar array for the particular location can be obtained using calculations tools such as the Fronius Solar.creator (creator.fronius.com).

Cable cross section per DC cable:
minimum 2.5 mm² - maximum 16 mm²

The DC cables can be connected to the DC terminals without ferrules.

Note! To ensure effective strain relief of the solar module strings, only use cables with identical cross-sections.

IMPORTANT! When using ferrules for DC cables with a cross-section of 16 mm², the ferrules must be crimped with a right-angled cross-section.
The use of ferrules with insulating collars is only permitted up to a max. cable cross-section of 10 mm².

The DC-side terminals are suitable for connecting single-wire, round aluminium cables. Because of the formation of a non-conductive oxide layer due to the reaction of aluminium with air, the following points must be considered when connecting aluminium cables:

• the reduced rated currents for aluminium cables
• the connection conditions listed below

Note! Always follow the cable manufacturer instructions when using aluminium cables.

Note! When designing cable cross-sections, take local regulations into account.

Connection conditions:

IMPORTANT! Do not use brushes, files or emery paper, as the aluminium particles get trapped and can be transferred to other conductors.

IMPORTANT! Repeat the procedure if the cable has been disconnected and is to be re-connected.

A dummy device is not suitable for connecting operationally to a photovoltaic system, and must only ever be used for demonstration purposes. Dummy devices are indicated as such on their rating plate.

IMPORTANT! Never connect DC cables to the DC connection sockets on a dummy device.

The connection of de-energised cables or sections of cable for demonstration purposes is permissible.

Only break out as many target break points as the number of cables that are provided (e.g. if there are 2 DC cables, then break out 2 recesses).

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Solar module ground on the negative pole via a fuse

(1)	Solar module
(2)	Inverter
(3)	Fuse

Fronius recommends the following fuse for the solar module ground on the negative pole:
nominal current rating 1 A / 600 V, fuse dimensions 10 x 38 mm

IMPORTANT! Fuses for grounding the solar module are not part of the scope of supply of the inverter. If the manufacturer of the solar module stipulates that earthing is required, an appropriate fuse must be ordered separately.

The inverter's insulation monitoring must be deactivated when the solar modules are grounded. In the Basic menu, the inverter must therefore be configured so that when the grounding fuse trips, an error message is displayed or the inverter is switched off (according to the country setup).
The access code 22742 must be entered to access the Basic menu.

IMPORTANT! Operating the inverter with one option card and two broken-out option card slots is not permitted.
To cater for this eventuality, a suitable blanking cover (42,0405,2020) is available from Fronius as an option.

IMPORTANT! If data communication cables are wired into the inverter, observe the following points:

• Depending on the number and cross-section of the data communication cables that are being introduced, take the relevant blanking plugs out of the sealing insert and insert the data communication cables.
• The relevant blanking plugs must be inserted into the free openings on the sealing insert.

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IMPORTANT! Operating the inverter with one option card and two broken-out option card slots is not permitted.
To cater for this eventuality, a suitable blanking cover (42,0405,2020) is available from Fronius as an option.

IMPORTANT! If data communication cables are wired into the inverter, observe the following points:

• Depending on the number and cross-section of the data communication cables that are being introduced, take the relevant blanking plugs out of the sealing insert and insert the data communication cables.
• The relevant blanking plugs must be inserted into the free openings on the sealing insert.

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IMPORTANT! Observe the ESD guidelines when handling option cards.

IMPORTANT! Only one Fronius Datamanager in master mode is permitted per Fronius Solar Net ring. Switch any other Fronius Datamanagers to slave mode or remove them.
Seal off the unoccupied option card slot by replacing the cover (item number 42,0405,2094); alternatively, use an inverter without a Fronius Datamanager (light version).

IMPORTANT! Only break out one opening for the PC board when installing a Datamanager in the inverter.

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Ensure that the conduits are tightly sealed.

Ensure that the conduits are tightly sealed.

The side sections of the housing lid are designed to function as holding and carrying handles.

• Never attach the inverter to the mounting bracket or swing it in unless the DC main switch is switched off.
• Never use force to attach the inverter or swing it in.

The fastening screws in the data communication area of the inverter are used for securing the inverter to the mounting bracket. Correctly tightened fastening screws are a prerequisite if proper contact is to be established between the inverter and mounting bracket.

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The side sections of the housing lid are designed to function as holding and carrying handles.

• Never attach the inverter to the mounting bracket or swing it in unless the DC main switch is switched off.
• Never use force to attach the inverter or swing it in.

The fastening screws in the data communication area of the inverter are used for securing the inverter to the mounting bracket. Correctly tightened fastening screws are a prerequisite if proper contact is to be established between the inverter and mounting bracket.

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When starting the inverter for the first time, it is necessary to select various setup settings.

If setup is interrupted before it is complete, it can be restarted by means of an AC reset. An AC reset can be carried out by switching the automatic circuit breaker off and on again.

The country setup can only be set when using the inverter for the first time. If the country setup needs to be changed at a later date, please contact your Technical Support team.

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When starting the inverter for the first time, it is necessary to select various setup settings.

If setup is interrupted before it is complete, it can be restarted by means of an AC reset. An AC reset can be carried out by switching the automatic circuit breaker off and on again.

The country setup can only be set when using the inverter for the first time. If the country setup needs to be changed at a later date, please contact your Technical Support team.

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If a USB flash drive is connected to the USB A socket it can function as a datalogger for an inverter.

The logging data stored on the USB flash drive can be viewed at any time in third-party programmes (e.g Microsoft® Excel) using the CSV file logged at the same time.

Older versions of Excel (before Excel 2007) are limited to a maximum of 65,536 rows.

If a USB flash drive is connected to the USB A socket it can function as a datalogger for an inverter.

The logging data stored on the USB flash drive can be viewed at any time in third-party programmes (e.g Microsoft® Excel) using the CSV file logged at the same time.

Older versions of Excel (before Excel 2007) are limited to a maximum of 65,536 rows.

If the USB flash drive is being used as a data logger, three files will be created automatically:

• FRONIUS.sys system file:
  This file stores information from the inverter that is irrelevant to the customer. The file must not be deleted separately. Only delete all of the files (sys, fld, csv) at one time.
  
• DALO.fld log file:
  A log file for reading the data in the Fronius Solar.access software.
  
  Further details on the Fronius Solar.access software can be found in the "DATCOM Details" operating instructions at http://www.fronius.com
  
• DATA.csv log file:
  A log file for reading the data in a spreadsheet program (e.g.: Microsoft® Excel)

Data structure on the USB flash drive

(1)	USB root directory
(2)	Fronius inverters (Fronius Galvo, Fronius Symo, Fronius Primo or Fronius Eco)
(3)	Inverter number - can be set in the Setup menu under DATCOM

If there are several inverters with the same inverter number, the three files will be saved in the same folder. A digit is added to the file name as a suffix (e.g.: DALO_02.fld)

Structure of the CSV file:

A USB flash drive with a storage capacity of 1 GB can record logging data for roughly seven years at a logging interval of five minutes.

CSV file
CSV files can only store 65,535 lines (data records) (up to Microsoft® Excel 2007; there is no restriction from this version onwards).
At a five-minute logging interval, the 65,535 lines will be written within approximately seven months (CSV data size of approx. 8 MB).
In order to avoid data loss, the CSV file should be backed up to a PC and deleted from the USB flash drive within this seven-month period. If the logging interval is set to a longer period, this time frame will be increased accordingly.

FLD file
The FLD file should not be larger than 16 MB. This will provide enough storage capacity for approximately six years at a logging interval of five minutes.
If the file exceeds the 16 MB limit, it should be backed up to a PC and all of the data on the USB flash drive should be deleted.

After backing up and removing the data, the USB flash drive can be reconnected immediately to resume recording the logging data without any further steps being required.

Note! Using a full USB flash drive can lead to data loss or data being overwritten. When using USB flash drives, always ensure that there is sufficient storage capacity on the flash drive.

If the USB stick is unplugged (e.g. for data backup purposes), the logging data is written to a buffer memory in the inverter.
As soon as the USB stick is plugged in again, the data is copied automatically from the buffer memory to the stick.

The buffer memory can store a maximum of six logging points. Data is only logged while the inverter is running (output greater than 0 W). The logging interval is permanently set at 30 minutes. Data can be recorded on the buffer memory for a three-hour time period as a result.

When the buffer memory is full, the oldest data in the memory will be overwritten by the next batch of data.

IMPORTANT! The buffer memory requires a permanent power supply.
If there is a power failure while the inverter is in operation, all the data in the buffer memory will be lost. To avoid losing data during the night, the automatic night switch-off facility must be deactivated (switch the "Night Mode" setup parameter to ON - see the Datamanager 2.0 Operating Instructions, section "Setting and displaying the menu items", "Viewing and adjusting parameters in the DATCOM menu item").
On the Fronius Eco or Fronius Symo 15.0-3 208, the buffer memory also functions with just a DC supply.

Due to the variety of USB flash drives available on the market, it cannot be guaranteed that every USB flash drive will be detected by the inverter.

Fronius recommends that only certified, industry-grade USB flash drives are used (look out for the USB-IF logo).

The inverter supports USB flash drives with the following file systems:

• FAT12
• FAT16
• FAT32

Fronius recommends that the USB flash drive employed should only be used for recording logging data or updating the inverter software. The USB flash drives should not contain any other data.

USB symbol on the inverter display, e.g. in display mode 'NOW':

If the inverter detects a USB flash drive, the USB symbol will appear in the top right corner of the display.

When inserting a USB flash drive, check whether the USB symbol is displayed (it may also flash).

Note! Please note for outdoor applications that conventional USB flash drives are often only guaranteed to work within a restricted temperature range.
For outdoor applications ensure that the USB flash drive also functions, for example, at low temperatures.

With the help of the USB stick, end customers can also update the inverter software via the USB item on the SETUP menu: the update file is first saved to the USB stick, from where it is then transferred to the inverter. The update file must be saved in the root directory on the USB stick.

Note! When installed outdoors in a horizontal position: once a year, check that all screw joints are tight!

Maintenance and servicing may only be carried out by Fronius-trained service technicians.

Note! When installed outdoors in a horizontal position: once a year, check that all screw joints are tight!

Maintenance and servicing may only be carried out by Fronius-trained service technicians.

Clean the inverter as required with a damp cloth.
Do not use cleaning agents, abrasives solvents or similar to clean the inverter.