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| Model | GW20K-ET |
| Nominal Battery Voltage (V) | 500 |
| Battery Voltage Range (V) | 200 ~ 800 |
| Max. Continuous Charging Current (A) | 50 |
| Max. Continuous Discharging Current (A) | 50 |
| Max. Charge Power (W) | 20000 |
| Max. Discharge Power (W) | 20000 |
| Max. Input Power (W) | 30000 |
| MPPT Operating Voltage Range (V) | 200 ~ 850 |
| Start-up Voltage (V) | 200 |
| Nominal Input Voltage (V) | 620 |
| Number of MPP Trackers | 2 |
| Number of Strings per MPPT | 2/2 |
| Nominal Apparent Power Output to Utility Grid (VA) | 20000 |
| Max. Apparent Power Output to Utility Grid (VA) | 22000 |
| Nominal Output Voltage (V) | 380 / 400 |
| Power Factor | ~1 (Adjustable from 0.8 leading to 0.8 lagging) |
| Back-up Nominal Apparent Power (VA) | 20000 |
| Max. Output Apparent Power (VA) | 20000 (24000@60s, 32000@3s) |
| Max. Efficiency | 98.0% |
| European Efficiency | 97.5% |
| Max. Battery to AC Efficiency | 97.5% |
| MPPT Efficiency | 99.9% |
| Communication with BMS | RS485, CAN |
| Communication with Meter | RS485 |
| Operating Temperature Range(°C) | -35 ~ +60 |
| Ingress Protection Rating | IP66 |
| Mounting Method | Wall Mounted |
| Weight | 54 kg |
| Dimension | 520 × 660 × 220 mm |
