ÖkoFEN
The ÖkoFEN is a hybrid inverter range from ÖkoFEN with 10 models. Rated AC output 4.1 kW – 20.1 kW. Listed and verified: VDE-AR-N 4105. Sold in Germany.
Specifications
- Rated AC output
- 4.1 kW – 20.1 kW
- Models in this range
- 10
What the ÖkoFEN does
A hybrid inverter runs both the solar array and a home battery: it supplies the home from the panels first, stores the surplus and draws on the battery when the sun goes down. The ÖkoFEN range spans 4.1 kW to 20.1 kW of AC output, suiting arrays of about 4.1–5.3 kWp at the small end and 20.1–26.1 kWp at the large end, as installers commonly size the panels up to 30% above the inverter's rating.
In Germany, arrays of the same size produce about 3,690 to 18,090 kWh a year, assuming a conservative 900 kWh per kWp. For the smallest model, that is worth €284 a year fed into the grid at 7.70 ct per kWh, and up to €1,365 used at home instead of buying power at 37.0 ct.
Estimates. Electricity prices: BDEW Strompreisanalyse, autumn 2026; Bundesnetzagentur, EEG feed-in tariffs from 1 August 2026.
Product details
- Product type
- Hybrid inverter
- Brand
- ÖkoFEN
- Category
- Home Solar & Hybrid Inverters
- Sold in
- Germany
- Listed in
- ZEREZ (FGW, Germany)
Models (10)
| Model | AC output |
|---|---|
| ÖkoFEN 4kW-3P-3G25 | 4.1 kW |
| ÖkoFEN 5kW-3P-3G25 | 5.1 kW |
| ÖkoFEN 6kW-3P-3G25 | 6.1 kW |
| ÖkoFEN 8kW-3P-3G25 | 8 kW |
| ÖkoFEN 10kW-3P-3G25 | 10.1 kW |
| ÖkoFEN 10kW-3P-3G40 | 10.1 kW |
| ÖkoFEN 12kW-3P-3G25 | 12.1 kW |
| ÖkoFEN 12kW-3P-3G40 | 12.1 kW |
| ÖkoFEN 15kW-3P-3G40 | 15.1 kW |
| ÖkoFEN 20kW-3P-3G40 | 20.1 kW |
Certifications
| Certification | Market | Status | Reference | Valid until |
|---|---|---|---|---|
| VDE-AR-N 4105 | Germany | ✓ Verified 20 October 2026 | 25-289-00; 25-288-00 |