| | | GT-20kW-B | GT-17KW-B | GT-15KW-B | GT-12KW-B |
| Efficiency | Max efficiency | 98.50% | 98.43% | 98.30% | 98.20% |
| Euro efficiency | 98.10% | 98.00% | 97.90% | 97.80% |
| MPPT | 99.90% | 99.90% | 99.90% | 99.90% |
| PV port | Absolute maximum PV input voltage | 1050V | 1050V | 1050V | 1050V |
| Start-up voltage | 180V | 180V | 180V | 180V |
| Rated PV input voltage | 630V | 630V | 630V | 630V |
| MPPT range for full load | 450V-800V | 450V-800V | 450V-800V | 500V-850V |
| Operating MPPT voltage range | 200V-1000V | 200V-1000V | 200V-1000V | 200V-950V |
| Number of independent MPPT | 2pcs(2+2)pcs | 2pcs(2+2)pcs | 2pcs(2+1)pcs | 2pcs(1+1)pcs |
| MaxPV input current for each MPPT | 23A23A | 23A23A | 23A12A | 12A |
| Max input short circuit current for each MPPT | 28A28A | 28A28A | 28A15A | 15A |
| Output AC | Nominal AC power | 20000W | 17000W | 15000W | 12000W |
| Absolute maximum AC power | 21500VA | 18800VA | 16500VA | 14000VA |
| Rated grid voltage/grid connected voltage range | 400V(230V)270V-480V |
| Grid type | 3LNPE | 3LNPE | 3LNPE | 3LNPE |
| Nominal grid current | 31A | 28A | 23A | 20.3A |
| Rated grid frequency | 50Hz60Hz 45Hz-55Hz55Hz-65Hz |
| Output THDi | <3% | <3% | <3% | <3% |
| Dc component | <0.5%*In | <0.5%*In | <0.5%*In | <0.5%*In |
| Nominal power factor and adjustable range | 1 and 0.8 leading-0.8 lagging |
| Protection | Dc switch | Y | Y | Y | Optional |
| Output over current protection | Y | Y | Y | Y |
| Anti-islanding protection | Y | Y | Y | Y |
| Current surge protection | DC level 2AC level3 |
| Dc reverse | Y | Y | Y | Y |
| Residual current | Y | Y | Y | Y |
| Insulation resistor detection | Y | Y | Y | Y |
| Current overvoltage protection | Y | Y | Y | Y |
| General data | Dimensions(W/H/D)mm | 505420210 |
| Weight | 25kg | 25kg | 23kg | 20kg |
| IP grade | IP65 | IP65 | IP65 | IP65 |
| Mounting | Wall bracket | Wall bracket | Wall bracket | Wall bracket |
| Cooling | Wind cooling | Wind cooling | Wind cooling | Wind cooling |
| Isolation level | Transformerless | Transformerless | Transformerless | Transformerless |
| Standby consumption | <15W | <15W | <12W | <10W |
| Ambient temperature | -30℃-60℃(derating at 45℃) |
| Relative humidity | 0~100% |
| Operating altitude | <3500m,derating at 2000m |
| Display/monitoring | LED |
| Communication | GPRSWIFI |
| AC/DC connection | Plug |
| Standard | Safety | IEC62109-1/-2,IEC62116,IEC61727 |
| EMC | EN61000-6-2, EN61000-6-3 |
| Grid | AS4777.2,NBIT 32004-2018 |
