Higher efficiency thanks to condensing boiler technology
Battery storage system
The heat-intelligent battery storage system
Perfectly combined with a pellet boiler or heat pump, the ÖkoFEN battery storage system ensures maximum independence and the lowest energy operating costs. The heat-intelligent battery storage can be integrated into existing PV systems at any time and is ideally suited for combination with an ÖkoFEN heat pump and pellet boiler.
Highlights of the battery storage system
Features
PLUG & PLAY
The ÖkoFEN GreenBOX® – maximum networking intelligence for your energy system
The ÖkoFEN GreenBOX® is the intelligent heart of the battery storage system. It ensures that all components – from the heating system and the solar panel array to the electric car charging station – are connected automatically, efficiently and in a way that optimises heat usage.
Cost savings for practices during the transition period
Generally speaking, solar power output is high in summer and low in winter. Looking at electricity consumption in March, April, September and October, a heat-intelligent battery storage system can reduce grid consumption by up to 76%, depending on its size and configuration.
Assumptions: 10 kWp south-facing PV system, 20° tilt, 3,000 kWh domestic electricity, heat pump, 165 m² – 6,000 kWh consumption, hot water via heat pump, 22.5 °C room temperature, Energieinstitut.at/tools/susi – 28 May 2025, months: March/April/September/October
Available from your local electrical retailer
Security features
Performance metrics
| Performance metrics |
Standard
|
With a heat pump
or an electric car |
 With a heat pump
and an electric car |
||||
|---|---|---|---|---|---|---|---|
| Battery modules | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Storage capacity* kWh | 7.7 | 11.5 | 15.3 | 19.2 | 23 | 26.8 | 30.7 |
| Max. usable storage capacity (kWh) | 6.9 | 10.4 | 13.8 | 17.3 | 20.7 | 24.1 | 27.6 |
| Rated voltage V | 153 | 230 | 307 | 384 | 460 | 537 | 614 |
| Loading and unloading capacity | 3,8-6,1 | 5,8-9,2 | 6,0-12,3 | 6,0-15,4 | 6,0-18,4 | 6,0-20,0 | 6,0-20,0 |
| Dimensions in mm (698 x 356 x H) including BMS and inverter | 1,117 | 1,255 | 1,393 | 1,531 | 1,669 | 1,807 | 1,945 |
| Weight in kg | 159 | 201 | 243 | 285 | 327 | 369 | 411 |
*Max. depth of discharge: 90% DOD
| Hybrid inverter | 6 kW - 3P-3G25 | 8 kW - 3P-3G25 | 10 kW - 3P-3G40 | 12 kW - 3P-3G40 | 15 kW - 3P-3G40 | 20 kW - 3P-3G40 |
|---|---|---|---|---|---|---|
| Max. usable DC input power (kWp) | 9 | 12 | 15 | 18 | 22.5 | 30 |
| Dimensions excluding battery in mm (WxDxH) | 698 x 356 x 613 | |||||
| Max. AC output power in kW | 6.6 | 8.8 | 11 | 13.2 | 16.5 | 22 |
| Max. DC input voltage in V | 950 | |||||
| MPPT voltage range in V | 120-950 | 200-950 | ||||
| Min. DC starting voltage in V | 135 | |||||
| Max. DC starting voltage in V | 950 | |||||
| MPP tracker/string connections per MPPT | 2 / 1 | 2 / 2 | ||||
| Rated current per MPPT | 15 | 30 | ||||
| Max. DC charging and discharging current in A | 25 | 40 | ||||
| Max. CD loading and unloading power in kW | 6.0 | 8.0 | 10.0 | 12.0 | 15.0 | 20.0 |
| Emergency power switchover time | < 10 mS | |||||
| Weight in kg | 55 | 59 | 62 | |||
Technical specifications
| Gross capacity | Number of battery modules | Dimensions |
|---|---|---|
| 7,7 kWh | 2 LFP battery storage modules | 698 x 356 x 1117 mm |
| 11,5 kWh | 3 LFP battery storage modules | 698 x 356 x 1255 mm |
| 15,3 kWh | 4 LFP battery storage modules | 698 x 356 x 1393 mm |
| 19,2 kWh | 5 LFP battery storage modules | 698 x 356 x 1531 mm |
| 23,0 kWh | 6 LFP battery storage modules | 698 x 356 x 1669 mm |
| 26,8 kWh | 7 LFP battery storage modules | 698 x 356 x 1807 mm |
| 30,7 kWh | 8 LFP battery storage modules | 698 x 356 x 1945 mm |
- Cell technology: LiFePo4
- 10 kW 3-phase hybrid inverter: (W x D x H): 698 x 356 x 613 mm, 59 kg
- BMS: 698 x 356 x 138 mm, 11 kg
- Battery module 3.84 kWh: 698 x 356 x 138 mm, 42 kg
- Base module: 698 x 356 x 100 mm, 15 kg – incl. adjustable feet
- Complete storage system with 30.7 kWh (8 modules): 698 x 356 x 1945 mm
- Distance to ceiling: > 300 mm
- Enclosure protection rating: Inverter IP65
- Enclosure protection rating: Battery storage: IP21 (24 cells per module)
ÖkoFEN P40 Wallbox
- Easy installation & setup
- 1P or 3P PV charging
- Integrated Type A circuit breaker
- Smart charge management
- Integrated energy meter
- Wi-Fi/LAN communication & visualisation
- Up to 11 kW charging power (optional 22 kW)
- Bidirectional integration – depending on model and network provider (optional)
- Made in Austria
Flexible emergency power box
- Emergency power box for operation during a mains power failure
- Pre-installed box for manual switchover to emergency power mode, including Energy Meter LAN, dimensions (H x W x D): 500 mm x 300 mm x 200 mm
- Simple installation in the room where it is to be installed: Eliminates the need for complex installation at the electrical distribution board
- The inverter must be installed in a well-ventilated area, as the unit generates heat during operation.
- The floor must be flat and level, and capable of supporting the weight of the product.
- The optimum ambient temperature for the system is 10–30 °C. If the temperature falls below or exceeds this range, performance will be reduced. The permissible installation temperature range is 5–35 °C.
- The installation environment must be free from dusty and potentially explosive substances.
- The system must not be installed in rooms where there are open flames or damp.
- The distance between the storage tank and external heat sources with a high radiation temperature > 60 °C (e.g. wood-burning stoves) must be more than 2 metres.
- Do not place the appliance in escape routes, stairwells, bedrooms or hallways, or in areas where children or pets may come into contact with it.
- For further details, please contact your local electrical contractor or get in touch with us.
- Battery storage units are also available without an ÖkoFEN heating system
- Inverters are also available without battery storage units
- An ÖkoFEN inverter is always required; existing inverters may be used, but this results in a loss of efficiency
- Battery storage units can also be configured in a cascade
- An internet connection for the inverter is a warranty requirement
- Direct online sales to qualified electricians
- Installation and commissioning by QUALIFIED ELECTRICIANS
- Delivery within Europe – either to end customers or to a qualified electrical contractor
- Storage capacity expandable within 2 years – from commissioning
- Ordering: ONLINE ONLY – via: electric.oekofen.com
- Support: Mon–Thu 8 am–4 pm, Fri 8 am–12 pm via: electric.oekofen.com
- Safety certification in accordance with IEC 62619:2022, including testing for thermal runaway
