Sunways STS
The Sunways STS is a solar inverter range from Sunways with 5 models. Rated AC output 1.1 kW – 3.3 kW. Listed and verified: VDE-AR-N 4105. Sold in Germany.
Specifications
- Rated AC output
- 1.1 kW – 3.3 kW
- Models in this range
- 5
What the Sunways STS does
A solar string inverter turns the direct current from a rooftop array into grid-quality alternating current for the home, and feeds what the home does not use into the grid. The Sunways STS range spans 1.1 kW to 3.3 kW of AC output, suiting arrays of about 1.1–1.4 kWp at the small end and 3.3–4.3 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 990 to 2,970 kWh a year, assuming a conservative 900 kWh per kWp. For the smallest model, that is worth €76 a year fed into the grid at 7.70 ct per kWh, and up to €366 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
- Solar inverter
- Brand
- Sunways · China
- Category
- Home Solar & Hybrid Inverters
- Sold in
- Germany
- Listed in
- ZEREZ (FGW, Germany)
Models (5)
| Model | AC output |
|---|---|
| STS-1KTL-S | 1.1 kW |
| STS-1.5KTL-S | 1.7 kW |
| STS-2KTL-S | 2.2 kW |
| STS-2.5KTL-S | 2.8 kW |
| STS-3KTL-S | 3.3 kW |
Certifications
| Certification | Market | Status | Reference | Valid until |
|---|---|---|---|---|
| VDE-AR-N 4105 | Germany | ✓ Verified 20 October 2026 | D1043390028 |