Growatt Solar Inverter Datasheet — WIT-28-55K-HU
Growatt — the world's #1 residential solar inverter brand by Wood Mackenzie. The WIT 28-55K-HU is a three-phase commercial hybrid inverter (4–100 kW). Designed for schools, mosques, agritech farms, and SMEs across the Middle East replacing diesel gensets with PV+battery.
SKU: WIT-28-55K-HU | Last Updated: 2026-05-01
⚡Electrical Specifications
| Max. recommended PV power (for module STC) | 56kW / 75.6kW / 86.4kW / 108kW |
| Start voltage | 195V |
| Max. open circuit voltage of PV | 630V |
| MPPT voltage range | 360V-1000V / 360V-550V / 360V-550V / 360V-550V |
| Max. input current per MPPT tracker | 32A |
| Max. short-circuit current per MPPT tracker | 40A |
| No. of PV strings per MPPT tracker | 2 |
| No. of MPPT trackers | 5 / 7 / 8 / 10 |
| AC nominal power/max. AC apparent power | 28kW/30.8kVA / 35kW/38.5kVA / 40kW/44kVA / 55kW/60.5kVA |
| Nominal AC voltage/range | 208V/220V, -15%~10% |
| AC grid frequency/range | 60Hz, 55-65Hz |
| Max. output current | 85.4A@208V / 106.9A@208V / 122.2A@208V / 168.1A@208V |
| Adjustable power factor | -1...+1 |
| THDi | <3% (100% load) |
| AC grid connection type | 3P3W+PE/3P4W+PE |
| Battery voltage range | 380V-650V, recommended @ 512V |
| Max. charging / discharging current | 79A / 99A / 113A / 156A |
| Continuous charging / discharging power | 31.7kW / 39.7kW / 45.3kW / 62.3kW |
| BMS communication | RS485/CAN |
| Battery type | Lithium |
| Max. efficiency | 98.2% |
| PV reverse polarity protection | Yes |
| Battery reverse protection | Yes |
| AC/DC surge protection | Type II |
| Insulation resistance monitoring | Yes |
| Ground fault monitoring | Yes |
| Grid monitoring | Yes |
| Residual-current monitoring unit | Yes |
| AC short-circuit protection | Yes |
| String monitoring | Yes |
| Anti-islanding protection | Yes |
| PID protection | Yes |
| AFCI function | Opt |
| Interfaces | RS485/CAN |
| Interfaces/WIFI/4G | Yes/Opt |
🔧Mechanical Specifications
| Dimensions (W/H/D) | 33.5/53.1/20.1 inch (850/1350/510mm) |
| Weight | 153kg/337.3lbs / 160kg/352.7lbs / 160kg/352.7lbs / 160kg/352.7lbs |
🌡️Environmental Specifications
| Operating temperature range | -22°F~+140°F, >122°F derating |
| Altitude | 13123ft(4000m) |
| Topology | Transformerless |
| Cooling | Smart air cooling |
| Enclosure | IP66/NEMA 4X |
| Display | OLED+LED/WIFI+APP |
📏Dimensions
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