Sieyuan Watten SiH
The Sieyuan Watten SiH is a solar inverter range from Sieyuan Watten with 4 models. Rated AC output 15 kW – 30 kW. Listed and verified: VDE-AR-N 4105. Sold in Germany.
Specifications
- Rated AC output
- 15 kW – 30 kW
- Models in this range
- 4
What the Sieyuan Watten SiH 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 Sieyuan Watten SiH range spans 15 kW to 30 kW of AC output, suiting arrays of about 15–19.5 kWp at the small end and 30–39 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 13,500 to 27,000 kWh a year, assuming a conservative 900 kWh per kWp. For the smallest model, that is worth €1,040 a year fed into the grid at 7.70 ct per kWh, and up to €4,995 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
- Sieyuan Watten · China
- Category
- Home Solar & Hybrid Inverters
- Sold in
- Germany
- Listed in
- ZEREZ (FGW, Germany)
Models (4)
| Model | AC output |
|---|---|
| SiH-15KW- TH | 15 kW |
| SiH-20KW- TH | 20 kW |
| SiH-25KW- TH | 25 kW |
| SiH-30KW- TH | 30 kW |
Certifications
| Certification | Market | Status | Reference | Valid until |
|---|---|---|---|---|
| VDE-AR-N 4105 | Germany | ✓ Verified 20 October 2026 | No. ESY 120194 0027 Rev.00 |