Growatt WIT 25K-HU 3 Phase Hybrid Inverter
- Up to 50kW recommended PV input
- 1000V DC maximum PV voltage
- 150–850V DC MPPT operating range
- 2 MPPT trackers
- 40A maximum input current per MPPT
- 40–60V battery voltage range
- 51.2V recommended battery voltage
- 420A maximum battery charge/discharge current
- 97.6% maximum efficiency
- 99.90% MPPT efficiency
$2,500
Description
Growatt WIT 25K-HU Technical Data
Solar PV Input
this solar inverter provides a PV input capacity that is twice its nominal AC rating. This gives the system considerable flexibility when designing the solar array.
| Solar Input Specification | WIT 25K-HU |
|---|---|
| Recommended Maximum PV Power | 50,000W |
| Maximum PV Input Voltage | 1000V DC |
| PV Start-Up Voltage | 180V DC |
| Nominal PV Voltage | 625V DC |
| MPPT Voltage Range | 150–850V DC |
| Maximum MPPT Input Current | 40A |
| Maximum Short-Circuit Current per MPPT | 50A |
| Number of MPPT Trackers | 2 |
| Number of Strings per MPPT | 2 |
| Maximum MPPT Efficiency | 99.90% |
Each MPPT tracker can accept two PV strings, while the maximum input current per tracker is specified at 40A.
AC and Backup Output
The inverter provides a nominal three-phase output of 25,000W. For short periods, its backup section can provide up to twice the rated power.
| Output Characteristic | Rated Value |
|---|---|
| Nominal AC Output | 25,000W |
| Maximum Grid Apparent Output | 27,500VA |
| Backup Apparent Power | 2 × Rated Power for 10 seconds |
| Maximum Backup Current | 75.76A |
| AC Voltage | 220/380V, 230/400V, 240/415V |
| Frequency | 50/60Hz |
| Adjustable Power Factor | -1 to +1 |
| THDv | 3% @ Linear Load |
| Three-Phase Load Balance Capability | 100% Unbalanced |
| Grid-to-Backup Transfer | <10ms |
| AC Wiring | 3P+PE / 3P+N+PE |
Battery Compatibility and Storage
It is compatible with both lead-acid and lithium-ion batteries. The manufacturer specifies a recommended battery voltage of 51.2V.
| Battery Specification | WIT 25K-HU |
|---|---|
| Supported Battery Types | Lead-acid / Lithium-ion |
| Operating Battery Voltage | 40–60V |
| Recommended Battery Voltage | 51.2V |
| Maximum Charge Current | 420A |
| Maximum Discharge Current | 420A |
| Battery Communication | RS485 / CAN |
Grid and Generator Connection
The WIT 25K-HU can operate as part of a hybrid system that includes the utility grid and additional AC sources such as a generator.
| AC Input / Grid Specification | WIT 25K-HU |
|---|---|
| Grid AC Input / Output Rated Power | 50,000W / 25,000W |
| Maximum Grid Apparent Input / Output | 55,000VA / 27,500VA |
| Maximum Grid Input / Output Current | 83.33A / 41.67A |
| Maximum GEN / AC Couple Current | 75.76A / 37.88A |
| Supported AC Voltage | 220/380V, 230/400V, 240/415V |
| Voltage Range | -15% to +10% |
| Nominal Frequency | 50/60Hz |
| Frequency Range | 45–55Hz / 55–65Hz |
| Power Factor | -1 to +1 |
| Grid Configuration | 3P+PE / 3P+N+PE |
Generator input and AC coupling expand the possible system configurations, particularly where multiple power sources need to work alongside battery storage.
Energy Storage and System Functions
| System Function | Specification |
|---|---|
| Hybrid Operation | Supported |
| Generator Input | Supported |
| AC Coupling | Supported |
| Parallel Operation | Up to 10 Units |
| Maximum Three-Phase Load Unbalance | 100% |
| Temporary Overload | 200% for 10 Seconds |
| Grid / Backup Transfer | <10ms |
| Battery BMS Communication | RS485 / CAN |
| Wi-Fi / LAN | Supported |
| RS485 / USB | Supported |
When 10 units are installed in parallel, the combined nominal inverter capacity based on the individual 25kW ratings is 250kW.
Efficiency Ratings
| Efficiency Parameter | Value |
|---|---|
| Maximum Efficiency | 97.6% |
| European Efficiency | 97% |
| MPPT Efficiency | 99.90% |
It reaches a maximum efficiency of 97.6%, while the maximum MPPT efficiency is specified as 99.90%.
Integrated Protection Features
| Safety / Protection Function | Specification |
|---|---|
| PV Reverse Polarity Protection | Yes |
| DC Disconnect / Switch | Yes |
| DC Surge Protection | Type II |
| AC Surge Protection | Type III |
| Insulation Monitoring | Yes |
| Residual Current Monitoring | Yes |
| AC Short-Circuit Protection | Yes |
| Ground Fault Monitoring | Yes |
| Grid Monitoring | Yes |
| PV String Monitoring | Yes |
| Anti-Islanding | Yes |
| AFCI | Optional |
Growatt 25K-HU solar inverter Size and Hardware
| Physical Characteristic | Specification |
|---|---|
| Width | 475mm |
| Height | 695mm |
| Depth | 241mm |
| Weight | 58kg |
| Enclosure Rating | IP66 |
| Cooling Technology | Smart Air Cooling |
| Internal Topology | Transformerless |
| Noise Emission | ≤55dB(A) |
| Display | OLED / LED + APP |
| Communication Ports | RS485 / USB / Wi-Fi / LAN |
Environmental Specifications
| Operating Condition | Specification |
|---|---|
| Temperature Range | -30°C to +60°C |
| Derating | Above 45°C |
| Relative Humidity | 0–100% |
| Maximum Altitude | 4000m |
| Enclosure Protection | IP66 |
The WIT 25K-HU is specified for operation across a temperature range of -30°C to +60°C. According to the specifications, power derating applies when the ambient temperature exceeds 45°C.
Suitable Applications for Growatt WIT 25K-HU
It can be incorporated into a range of three-phase solar and storage projects, including:
- Commercial solar PV installations
- Three-phase hybrid energy systems
- Solar battery storage projects
- Large residential energy storage systems
- Generator-supported solar systems
- AC-coupled PV systems
- Backup power installations
- Off-grid energy systems
- Systems with uneven three-phase loads
- High-capacity PV and battery applications
Growatt 25K-HU Hybrid inverter Selection Checklist
| What to Check | WIT 25K-HU Specification |
|---|---|
| Nominal Inverter Output | 25kW |
| Maximum Recommended PV Input | 50kW |
| Maximum PV Voltage | 1000V DC |
| MPPT Operating Range | 150–850V DC |
| MPPT Trackers | 2 |
| Battery Voltage Range | 40–60V |
| Recommended Battery Voltage | 51.2V |
| Maximum Battery Charge/Discharge Current | 420A |
| Parallel Units | Up to 10 |
| Generator Input | Yes |
| AC Coupling | Yes |
| Three-Phase Output | Yes |
FAQs
What is the maximum AC output current of the Growatt WIT 25K-HU?
It has a maximum backup output current of 75.76A. Its rated AC output power is 25,000W, while the maximum AC apparent output power reaches 27,500VA.
The Growatt 25kW hybrid inverter has a maximum efficiency of 97.6% and an MPPT efficiency of 99.90%, helping reduce conversion losses and improve solar energy utilization.
The WIT 25K-HU has a PV start voltage of 180V DC. Its nominal PV voltage is 625V DC, while the MPPT operating range extends from 150V to 850V DC.
Yes. The 25K-HU supports 3P+PE and 3P+N+PE grid connection configurations. Compatible rated AC voltage options include 220/380V, 230/400V, and 240/415V.
The Growatt 25kW inverter includes PV reverse polarity protection, a DC switch, DC Type II and AC Type III surge protection, insulation resistance monitoring, residual current monitoring, AC short-circuit protection, ground fault monitoring, grid monitoring, PV string monitoring, and anti-islanding protection. AFCI is available as an optional feature.
The WIT 25K-HU can operate between -30°C and +60°C, with temperature derating above 45°C. Its IP66 enclosure and smart air cooling system are designed for operation in demanding environmental conditions.
This hybrid inverter provides RS485, USB, Wi-Fi, and LAN communication interfaces. The battery system can communicate with the inverter through RS485 or CAN.
It has a specified noise level of no more than 55dB(A). Its smart air cooling system helps regulate the inverter temperature during operation.
This Growatt solar inverter is designed for installations at altitudes of up to 4000 meters. Its operating temperature range is -30°C to +60°C, with derating applied above 45°C.
1 review for Growatt WIT 25K-HU 3 Phase Hybrid Inverter
1 review for Growatt WIT 25K-HU 3 Phase Hybrid Inverter
-
Can Growatt WIT 25K-HU work with lithium batteries?
Michael Carter –
Can Growatt WIT 25K-HU work with lithium batteries?
webmaster –
Yes, it is compatible with high-voltage lithium battery systems for energy storage applications.