Growatt WIT 28-55K-HU
The Growatt WIT 28-55K-HU solar inverter is engineered for superior performance and efficiency. With a maximum recommended PV power of 56kW and a start voltage of 195V, it ensures reliable energy conversion. Its robust design supports a maximum open circuit voltage of 630V, making it ideal for diverse solar installations.
Technical Specifications
| Parameter | WIT 28K-HU-US L2 | WIT 35K-HU-US L2 | WIT 40K-HU-US L2 | WIT 55K-HU-US L2 |
|---|---|---|---|---|
| PV Input | ||||
| 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 | ||
| 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 Output | ||||
| 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 Input | ||||
| 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 | |||
| Efficiency | ||||
| Max. efficiency | 98.2% | |||
| Protection Features | ||||
| 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 | |||
| Mechanical Data | ||||
| Dimensions (W/H/D) | 33.5/53.1/20.1 inch (850/1350/510mm) | |||
| Weight | 153kg/337.3lbs | 160kg/352.7lbs | ||
| Operating Conditions | ||||
| 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 | |||
| Communication | ||||
| Interfaces | RS485/CAN | |||
| Interfaces/WIFI/4G | Yes/Opt | |||
Note: Specifications are based on the official Growatt datasheet. Values may be subject to change; always verify against the latest manufacturer documentation.
Key Features
Scalable system configuration, extend to 165kW
Support UPS function and black start
100% unbalanced load when backup
110% continuous AC overloading capacity
Support remote control of DG
Grid-support functions
Applications & Use Cases
Typical Applications
- Residential solar systems
- Commercial installations
- Industrial solar plants
- Utility-scale projects
- Smart grid integration
Regional Installation Notes (Qatar)
Climate Suitability: Ideal for Qatar's hot climate with wide operating temperature range and dust-resistant design.
- Sand and dust resistant design
- Wide operating temperature range
- High efficiency in hot conditions
- Long-term warranty
Frequently Asked Questions
What is the maximum output power and efficiency rating of the Growatt WIT 28-55K-HU inverter?
The Growatt WIT 28-55K-HU inverter has a maximum AC apparent power of 30.8 kVA and a nominal AC power of 28 kW. It is designed to deliver high efficiency, ensuring optimal energy conversion.
What are the PV input specifications for the Growatt WIT 28-55K-HU inverter?
The inverter supports a maximum open circuit voltage of 630V and operates within an MPPT voltage range of 360V to 1000V. It can handle a maximum recommended PV power of 56 kW.
What are the AC output specifications of the Growatt WIT 28-55K-HU inverter?
The inverter provides a nominal AC voltage range of 208V to 220V with a frequency range of 55-65Hz. It can deliver a maximum output current of 85.4A at 208V.
How many MPPT trackers and PV strings does the Growatt WIT 28-55K-HU inverter support?
The inverter is equipped with 5 MPPT trackers, each capable of supporting 2 PV strings, allowing for flexible and efficient solar array configurations.
What protection features are included in the Growatt WIT 28-55K-HU inverter?
The inverter includes comprehensive protection features such as overvoltage, undervoltage, overcurrent, and short-circuit protection to ensure safe and reliable operation.
What communication and monitoring options are available for the Growatt WIT 28-55K-HU inverter?
The inverter supports various communication protocols and monitoring options, enabling remote monitoring and management to optimize performance and maintenance.
What is the warranty coverage for the Growatt WIT 28-55K-HU inverter?
The Growatt WIT 28-55K-HU inverter typically comes with a standard warranty, which covers manufacturing defects and performance issues for a specified period. Please refer to the warranty documentation for detailed terms.
What are the installation requirements for the Growatt WIT 28-55K-HU inverter?
The inverter is designed for outdoor installation with an IP65 rating, ensuring protection against dust and water. It operates efficiently within a wide temperature range, making it suitable for various environmental conditions.