Growatt WIT 25K-HU 25kW Three-Phase Hybrid Solar Inverter – IP66

Product Specifications

The Growatt WIT 25K-HU 25kW Hybrid Solar Inverter is a powerful three-phase low-voltage hybrid inverter designed for large residential, commercial and high-demand solar energy storage installations.

Rated at 25kW, the inverter combines solar PV generation, battery storage, grid supply and generator input within a flexible energy management system. It supports 40–60V low-voltage lithium-ion or lead-acid batteries, with a recommended battery voltage of 51.2V.

The WIT 25K-HU features dual MPPT trackers, a wide 150–850V MPPT operating range, and supports up to 50,000W recommended PV power, making it suitable for substantial solar arrays.

For backup applications, it provides 25kW rated AC output and can deliver up to 200% of rated power for 10 seconds, helping accommodate demanding loads and temporary startup surges. Its less than 10ms on/off-grid transfer time provides rapid transition when backup power is required.

Built for demanding installations, the inverter incorporates smart air cooling, an IP66-rated enclosure, comprehensive electrical protection and remote monitoring capabilities.

Key Features

• 25kW Rated Power: Designed for high-capacity three-phase solar installations.
• Three-Phase Hybrid Operation: Integrates solar PV, battery storage, grid and generator power.
• 50kW Recommended PV Capacity: Supports substantial solar arrays for high-energy-demand applications.
• Dual MPPT Trackers: Provides flexible and efficient PV array configuration.
• Wide MPPT Range: Operates across 150–850VDC.
• High PV Input Capability: Maximum PV input voltage of 1000VDC.
• Low-Voltage Battery System: Supports 40–60V batteries with a recommended 51.2V battery voltage.
• High Battery Current: Supports up to 420A charging and discharging current.
• Fast Backup Transfer: On/off-grid transfer time of less than 10ms.
• 200% Overload Capability: Supports up to twice the rated backup power for 10 seconds.
• Generator Input: Allows generator integration as an additional AC power source.
• Smart Load Control: Supports flexible energy and load management.
• 97.6% Maximum Efficiency: Designed for efficient energy conversion.
• 99.9% MPPT Efficiency: Optimises available solar energy harvesting.
• IP66 Protection: Suitable for demanding installation environments.
• Smart Air Cooling: Provides active thermal management during operation.
• Remote Monitoring: Supports Wi-Fi/LAN connectivity and app-based monitoring.

Specifications

General

• Brand: Growatt

• Model: WIT 25K-HU

• Inverter Type: Three-Phase Hybrid Solar Inverter

• Rated AC Output Power: 25,000W (25kW)

• Protection Rating: IP66

• Cooling: Smart Air Cooling

Solar PV Input

• Recommended PV Power: 50,000W

• Maximum PV Input Voltage: 1000V

• PV Start Voltage: 180V

• Nominal PV Voltage: 625V

• MPPT Operating Range: 150–850V

• Number of MPPT Trackers: 2

• PV Strings per MPPT: 2

• Maximum Input Current per MPPT: 40A

• Maximum Short-Circuit Current per MPPT: 50A

AC Output & Grid

• Nominal AC Voltage: 220/380V, 230/400V, 240/415V

• Grid Frequency: 50/60Hz

• Maximum Grid Apparent Power: 27,500VA

• Rated Backup Output: 25,000W

• Backup Overload Capability: 200% of rated power for 10 seconds

• On/Off-Grid Transfer Time: <10ms

Battery

• Battery Type: Lithium-ion / Lead-acid

• Battery Voltage Range: 40–60V

• Recommended Battery Voltage: 51.2V

• Maximum Charge/Discharge Current: 420A

• BMS Communication: RS485 / CAN

Efficiency

• Maximum Efficiency: 97.6%

• European Efficiency: 97%

• MPPT Efficiency: 99.9%

Physical Specifications

• Dimensions (W × H × D): 475 × 695 × 241mm

• Weight: 58kg

• Operating Temperature: -30°C to +60°C

• Display: OLED / LED + App

• Communication: RS485 / USB

• Connectivity: Wi-Fi / LAN

PROTECTION FEATURES 

The Growatt WIT 25K-HU incorporates multiple protection functions, including PV reverse polarity protection, DC switch, DC/AC surge protection, insulation resistance monitoring, residual-current monitoring, AC short-circuit protection, ground-fault monitoring, grid monitoring, string monitoring and anti-islanding protection.

Applications

Suitable for:

• Large residential solar systems
• Commercial buildings
• Offices and business premises
• Hotels and hospitality facilities
• Schools and institutions
• Farms and agricultural facilities
• Workshops and light industrial facilities
• Three-phase solar backup installations
• High-capacity solar and battery storage systems