- MAX. EFFICIENCY 98.6%
- IP65 PROTECTION
STT 4~25kW
Three Phase | 2MPPT | On-Grid
The Sunways STT-4K~25KTL-P is a three-phase grid-tied inverter for residential, commercial, and small C&I rooftops. With up to 98.6% efficiency, wide MPPT range, and 10% overload capacity, it maximizes solar yield. IP65 protection, integrated DC/AC surge protection, and aluminum alloy casing ensure reliable outdoor operation. RS485, WiFi, GPRS, and LAN enable easy monitoring, remote updates, and fast setup via App or OLED display.
Key Features
Safe & Reliable
- High reliability due to good heat dissipation design
- Integrated lightning protection for both DC and AC
- Adaptable to complex grid environments
- High anti-corrosion ability with aluminum alloy die-casting technology
- Wider working temperature and altitude range for various installation environments
High Yield
- Max. efficiency up to 98.6%
- European weighted efficiency up to 98.2%
- Longer working hours due to lower start-up voltage and wider MPPT range
- Up to 10% continuous output overloading capacity
- Max. input current of 15A, compatible with high-power PV panels
Easy to Use
- Support wireless and wired internet connection: RS485, WiFi / GPRS / LAN optional
- Remote upgrading available
- Fast and easy configuration via App or OLED display
Product Highlights
| Parameter | Specification |
|---|---|
| Power Range | 4 kW / 5 kW / 6 kW / 8 kW / 10 kW / 12 kW / 15 kW / 17 kW / 20 kW / 25 kW |
| Max. Efficiency | Up to 98.6% |
| European Efficiency | Up to 98.2% |
| MPPT Design | 2 MPPTs |
| Protection Degree | IP65 |
| Max. DC Input Voltage | 1100 V |
| Communication | RS485, WiFi / GPRS / LAN Optional |
| Application | Residential, Commercial and Small C&I Rooftop Solar Systems |
| Parameter | Specification |
|---|---|
| Start-up Voltage | 180 V |
| Min. DC Voltage | 150 V |
| Rated DC Input Voltage | 620 V |
| MPPT Voltage Range | 160–1000 V |
| Max. Input Current | 15A / 15A, 15A / 30A, or 30A / 30A |
| Max. Short-circuit Current | 20A / 20A, 20A / 40A, or 40A / 40A |
| Grid Type | 3L / N / PE, 230 / 400 V |
| Rated AC Frequency | 50 / 60 Hz |
| Max. Output Current | 6.7–39 A |
| Power Factor | 0.8 leading … 0.8 lagging |
| THDi @ Rated Power | <3% |
| Operating Temperature | -30℃ ~ 60℃ |
| Operating Altitude | 4000 m, derating above 3000 m |
| Cooling | Natural Convection / Smart Fan Cooling |
| Noise Level | <25 dB / <40 dB |
| Display | OLED & LED |
| Dimensions | 550 × 410 × 175 mm |
| Weight | 23 kg / 26 kg / 29 kg |
| Topology | Transformerless |
