GoodWe SDT G3.1 Series Solar Inverters
High-performance three-phase inverters for residential solar energy solutions.
Product Overview
The GoodWe SDT G3.1 series inverters are designed for small and medium-sized three-phase applications. Featuring dual strings per MPPT, they maximize energy harvest by improving flexibility and optimization, even in low-light conditions. Engineered for high energy generation and exceptional reliability, these inverters efficiently handle heavier loads, making them an ideal choice for homeowners seeking energy independence.
Key Features
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High Compatibility
Max. 20A DC input current per string.
180% DC input oversizing.
2 strings per MPPT.
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Flexible and Adaptable Applications
Possibility of parallel connection with other GoodWe SDT G3 series.
Easy parallel connection with the GoodWe intelligent device Ezlink3000.
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Excellent Safety and Reliability
Integrated Type II DC SPD¹.
AI-enhanced AFCI.
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User-Friendly and Intuitive Design
Lightweight design for easy installation.
Silent operation below 45dB.
¹Only for GW12KLV-SDT-C31.
Technical Specifications
| Data | GW20K-SDT-31 | GW12KLV-SDT-C31 | GW25K-SDT-P31 |
|---|---|---|---|
| DC Input | |||
| Max. Input Power (W) | 36000 | 21600 | 45000 |
| Max. Input Voltage (V) | 1100*1 | 850*2 | 1100*1 |
| MPPT Voltage Range (V)*3 | 140~1000 | 140~700 | 140~1000 |
| Startup Voltage (V) | 160 | 140 | 160 |
| Nominal Input Voltage (V) | 600 | 420 | 600 |
| Max. Input Current per MPPT (A) | 40/40 | 22.5/22.5 | 40/40 |
| Max. Short Circuit Current per MPPT (A) | 52.5/52.5 | 27.5/27.5 | 52.5/52.5 |
| Number of MPPTs | 2 | 2 | 2 |
| Number of strings per MPPT | 2/2 | 2/2 | 2/2 |
| AC Output | |||
| Nominal Output Power (W) | 20000 | 12000 | 25000 |
| Max. Active Output Power (W) | 20000 | 12000 | 25000 |
| Max. Apparent Output Power (VA) | 20000 | 12000 | 25000 |
| Nominal Output at 40°C (W) | 20000 | 12000 | 25000 |
| Max. Output at 40°C (W) | 20000 | 12000 | 25000 |
| Nominal Output Voltage (V) | 220/380, 230/400, 240/415, 3L/N/PE or 3L / PE | 127/220, 3L/N/PE or 3L / PE | 220/380, 230/400, 240/415, 3L/N/PE or 3L / PE |
| Output Voltage Range (V) | 180~280 | 114~139 | 180~280 |
| Nominal AC Grid Frequency (Hz) | 50/60 | 60 | 50/60 |
| AC Grid Frequency Range (Hz) | 45~55/55~65 | 59.5~60.2 | 45~55/55~65 |
| Max. Output Current (A) | 30.3 | 31.5 | 37.9 |
| Output Power Factor | ~1 (Adjustable 0.8 capacitive - 0.8 inductive) | ~1 (Adjustable 0.8 capacitive - 0.8 inductive) | ~1 (Adjustable 0.8 capacitive - 0.8 inductive) |
| Max. Total Harmonic Distortion | <3% | <3% | <3% |
| Efficiency | |||
| Max. Efficiency | 98.5% | 98.2% | 98.5% |
| European Efficiency | 97.9% | 97.2% | 97.9% |
| Protection | |||
| String Current Monitoring | Integrated | Integrated | Integrated |
| DC Insulation Resistance Detection | Integrated | Integrated | Integrated |
| Residual Current Monitoring | Integrated | Integrated | Integrated |
| Anti-islanding Protection | Integrated | Integrated | Integrated |
| Output Overcurrent Protection | Integrated | Integrated | Integrated |
| Output Short Circuit Protection | Integrated | Integrated | Integrated |
| Output Overvoltage Protection | Integrated | Integrated | Integrated |
| DC Disconnect Switch | Integrated | Integrated | Integrated |
| DC Surge Protection (DPS) | Type III (Type II Optional) | Type III (Type II Optional) | Type III (Type II Optional) |
| AC Surge Protection (DPS) | Type II | Type II | Type II |
| AFCI | Integrated | Integrated | Integrated |
| Remote Shutdown | Integrated | Integrated | Integrated |
| PID Recovery Device | Optional | Optional | Optional |
| AC Night Start | Optional | Optional | Optional |
| General Data | |||
| Operating Temperature Range (°C) | -30 ~ +60 | -30 ~ +60 | -30 ~ +60 |
| Relative Humidity | 0~100% | 0~100% | 0~100% |
| Cooling Method | Intelligent Fan | Intelligent Fan | Intelligent Fan |
| User Interface | LED, LCD (Optional), WLAN + APP | LED, LCD (Optional), WLAN + APP | LED, LCD (Optional), WLAN + APP |
| Communication | RS485, WiFi + LAN or 4G or Bluetooth (Optional) | RS485, WiFi + LAN or 4G or Bluetooth (Optional) | RS485, WiFi + LAN or 4G or Bluetooth (Optional) |
| Communication Protocols | Modbus RTU, Modbus TCP | Modbus RTU, Modbus TCP | Modbus RTU, Modbus TCP |
| Weight (kg) | 16.6 | 16.6 | 17.7 |
| Dimensions (W x H x D mm) | 530 × 413 × 221 | 530 × 413 × 221 | 530 × 413 × 221 |
| Noise Emission (dB) | <45 | <45 | <45 |
| Topology | Non-isolated | Non-isolated | Non-isolated |
| Self-Consumption at Night (W) | <1 | <1 | <1 |
| Protection Rating | IP66 | IP66 | IP66 |
| DC Connector | MC4 (4~6mm²) | MC4 (4~6mm²) | MC4 (4~6mm²) |
| AC Connector | OT Terminal (max. 16mm²) | OT Terminal (max. 16mm²) | OT Terminal (max. 16mm²) |
*1: When the input voltage is between 1000-1100V, the inverter will enter standby mode. The inverter will return to normal operation when the voltage returns to 1000V.
*2: When the input voltage is between 785-850V, the inverter will enter standby mode. The inverter will return to normal operation when the voltage returns to 785V.
*3: Please refer to the user manual to check the voltage range per MPPT at Nominal Power.
*: Please refer to the GoodWe website for updated certificates.
