Sunways STH
The Sunways STH is a hybrid inverter range from Sunways with 11 models. Rated AC output 4.4 kW – 29.9 kW. Listed and verified: VDE-AR-N 4105. Sold in Germany.
Specifications
- Rated AC output
- 4.4 kW – 29.9 kW
- Models in this range
- 11
What the Sunways STH 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 Sunways STH range spans 4.4 kW to 29.9 kW of AC output, suiting arrays of about 4.4–5.7 kWp at the small end and 29.9–38.9 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 3,960 to 26,910 kWh a year, assuming a conservative 900 kWh per kWp. For the smallest model, that is worth €305 a year fed into the grid at 7.70 ct per kWh, and up to €1,465 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
- Sunways · China
- Category
- Home Solar & Hybrid Inverters
- Sold in
- Germany
- Listed in
- ZEREZ (FGW, Germany)
Models (11)
| Model | AC output |
|---|---|
| STH-4KTL-HT | 4.4 kW |
| STH-5KTL-HT | 5.5 kW |
| STH-6KTL-HT | 6.6 kW |
| STH-8KTL-HT | 8.8 kW |
| STH-10KTL-HT | 11 kW |
| STH-12KTL-HT | 13.2 kW |
| STH-15KTL-HT | 16.5 kW |
| STH-17KTL-HT | 18.7 kW |
| STH-20KTL-HT | 22 kW |
| STH-25KTL-HT | 27.5 kW |
| STH-29.9KTL-HT | 29.9 kW |
Certifications
| Certification | Market | Status | Reference | Valid until |
|---|---|---|---|---|
| VDE-AR-N 4105 | Germany | ✓ Verified 20 October 2026 | 31-163529, ESY1043390077 |