ONESTO OST
The ONESTO OST is a hybrid inverter range from ONESTO with 4 models. Rated AC output 5 kW – 10 kW. Listed and verified: VDE-AR-N 4105. Sold in Germany.
Specifications
- Rated AC output
- 5 kW – 10 kW
- Models in this range
- 4
What the ONESTO OST 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 ONESTO OST range spans 5 kW to 10 kW of AC output, suiting arrays of about 5–6.5 kWp at the small end and 10–13 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 4,500 to 9,000 kWh a year, assuming a conservative 900 kWh per kWp. For the smallest model, that is worth €347 a year fed into the grid at 7.70 ct per kWh, and up to €1,665 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
- ONESTO · China
- Category
- Home Solar & Hybrid Inverters
- Sold in
- Germany
- Listed in
- ZEREZ (FGW, Germany)
Models (4)
| Model | AC output |
|---|---|
| OST 5000HB-T | 5 kW |
| OST 6000HB-T | 6 kW |
| OST 8000HB-T | 8 kW |
| OST 10000HB-T | 10 kW |
Certifications
| Certification | Market | Status | Reference | Valid until |
|---|---|---|---|---|
| VDE-AR-N 4105 | Germany | ✓ Verified 20 October 2026 | ESY 104617 0015 |