Higher efficiency thanks to condensing boiler technology
FAQs
Yes, the product is certified.
No, it does not.
The inverter itself supports Modbus RTU and CAN.
The communication module (dual LAN/WLAN module) supports WLAN, LAN, and Modbus TCP.
For example, a pool pump.
The flexible output requires an ÖkoFEN heating system with a heating circuit controller, which is connected to BRANF2.
Alternatively, the SG contact on the inverter can be used.
No, only a user-created template is available.
Yes, single-phase operation is possible.
If the current is too high, the inverter shuts down and automatically attempts to restart.
In general, a surge protection device installed as close as possible to the inverter (max. 10 m away) is sufficient.
A generator connection box – including surge protection and disconnection – is recommended to isolate the PV system from the inverter on all poles.
Yes – to avoid any liability exclusions.
Yes, it does.
Yes, it is.
Yes, briefly by up to 10%.
One third of the nominal power.
Example: for a 20 kW inverter → approx. 6.66 kW per phase.
The grid switch is located in the electrical distribution board or in the backup box and is set to GRID by default. This means power is supplied via the battery system and/or the grid.
If a grid outage occurs, the system can be manually switched to BACKUP. This manual switching ensures that a power outage is actively detected.
Once switched to BACKUP, the system operates according to the principle of automatic switching.
Note: The output power is limited to the maximum capacity of the inverter.
In principle, this setting can also be maintained permanently, ensuring full system functionality (including grid feed-in, etc.).
In the event of a grid outage, all consumers in the household are switched over automatically and immediately.
The system will then operate until the battery reaches its minimum state of charge of 10%.
One drawback is that the entire grid load is continuously routed through the inverter, which increases its usage.
Settings:
- GRID (default): Power supply from battery and/or grid
- 0 or OFF: No power supply within the building
- BACKUP: Power supply via inverter/battery system
On average, standby consumption is less than 15 watts.
Optimal temperature range at the installation site: 10–30°C
Permissible ambient temperature for the storage system: 5–35°C
The system experiences significant performance losses at low temperatures.
Outdoor installation is not permitted, and any warranty claims will be void.
No, outdoor installation is not permitted.
No, the battery does not have integrated heating.
- DC reverse polarity protection
- Battery input reverse polarity protection
- Insulation resistance monitoring
- Surge protection
- Overtemperature protection
- Residual current protection
- Island protection
- AC surge protection
- Overload protection
- AC short-circuit protection
Please refer to the applicable OIB guidelines.
The system is safety-certified.
Yes, the batteries are certified for thermal runaway.
Yes, external surge protection devices must be installed.
There are 4 temperature sensors per slave – a total of 8 sensors per battery module.
No, there are no aerogel pads between the packs.
Yes, but an efficiency loss of approx. 5% can be expected.
This means that, due to the use of two inverters, only about 90% of the generated solar energy actually reaches the battery.
This is an AC-coupled solution.
Charging path (existing inverter):
PV (DC) → PV inverter (AC) → battery inverter (AC → DC) → battery (DC)
Discharging path:
Battery (DC) → battery inverter (AC)
This setup is technically standard and not a fault – it is simply slightly less efficient than a DC-coupled system.
The actual additional loss is typically around 2–5% compared to a DC-coupled solution.
In return, you benefit from:
- easier retrofitting
- flexible combination of different manufacturers
- potential additional MPPT inputs for PV expansion
- minimal intervention in the existing PV system
There is no reduction in overall system performance.
As of 09/2025, an additional inverter is always required.
A dust-free environment must be ensured. Installation next to a pellet storage or pellet boiler is possible, provided minimum safety distances for fire prevention are maintained. For further details, please consult a qualified electrician.
The inverter may be installed a maximum of 2 meters from the battery storage system.
In general, only the online portal and the myPelletronic app are required.
ÖkoFEN provides online training sessions and technical video content.
Participation in an online training course is required before the first installation.
These settings can be configured via the online portal or directly on the inverter display.
These settings can be configured via the online portal or directly on the inverter display.
Yes, corresponding reports can be downloaded.
Yes, this is possible.
The operating mode must be set to island mode.
See warranty terms: 10 years or 10,000 charge cycles – warranty applies to both the battery system and the inverter.
(The BMS includes a cycle counter.)
A minimum charge level of 10% is recommended.
The storage system can continue normal charging and discharging safely without an internet connection.
However, intelligent functions that rely on online data (e.g. weather data, spot prices) will not be executed.
This means the battery storage works, but the GreenBOX functionality is limited.
The inverter creates a local hotspot that can be used.
For direct access to the BMS, a CAN tool is required.
Data is stored locally for 14 days; otherwise, it is stored on a server in Germany.
All data is recorded at 5-minute intervals.
No, data is imported via an EPEX Spot interface.
Yes, notifications are sent automatically.