Growatt · Solar inverter model
WIT hybrid inverter
Growatt WIT is a broad three-phase commercial hybrid-inverter family with several battery-voltage and AC-voltage classes.
Specifications
| Specification | Value |
|---|---|
| Type | hybrid inverter |
| Supply phases | three |
| Rated AC power (kW) | 4 to 125 across cited current 380, 400 and 415 V families |
| MPPT count | 1 or 2 for cited 4 to 25 kW schedules |
| Maximum input current (A) | 20 or 40 per MPPT, depending on cited 4 to 25 kW input arrangement |
| Maximum efficiency (%) | 4-25K XHU: 98.1; 4-25K HU: 97.6 |
| Euro efficiency (%) | 4-25K XHU: 97.2; 4-25K HU: 97.0 |
| Battery compatible | Yes |
| Battery-voltage range (V) | 4-25K XHU: 120 to 800; 4-25K HU: 40 to 60 |
| Warranty (years) | XHU: 5 standard, 10 optional; 4-15K HU: 10; 17-25K HU: 5 standard, 10 optional |
| IP rating | IP66 for cited current families |
| Recommended maximum PV power (kW) | 4-25K XHU: 8 to 50; 4-25K HU: 6.4 to 50 |
| Maximum PV input voltage (V) | 1000 for cited 4 to 25 kW schedules |
| PV working-voltage range (V) | 150 to 850 for cited 4 to 25 kW schedules |
| Maximum short-circuit current (A) | 25 or 50 per MPPT, depending on cited 4 to 25 kW input arrangement |
| Backup output (kW) | matches rated power for cited 4 to 25 kW schedules |
| Peak backup apparent power (kVA) | twice rated apparent power for 10 s in cited 4 to 25 kW schedules |
| Backup transition (ms) | <10 for cited 4 to 25 kW schedules |
| Operating-temperature range (°C) | -30 to 60, with derating above 45, for cited 4 to 25 kW schedules |
Growatt WIT is a broad family of three-phase commercial hybrid inverters. Its current worldwide range spans several power and AC-voltage classes, so the full suffix is needed before its battery interface or input schedule can be identified.
HU and XHU in the 4-25K families
In the WIT 4-25K range, HU is the low-voltage battery version and XHU is the high-voltage version. That distinction does not extend across every WIT product: the current 50-100K-HU/AU range uses high-voltage batteries.
The two cited groups also have different efficiency and warranty schedules. Tracker count changes with rating, and some MPPT have two PV string inputs. Current limits therefore need to be read against the exact tracker arrangement rather than the product page’s per-string headline alone.
XHU supports named AXE high-voltage systems. The battery cabinet, controls, cables and firmware are part of that exact pairing. WIT 4-25K HU instead uses a low-voltage battery interface.
Generator input and backup output
The documented WIT 4-50K families include a controlled, model-specific generator input.
Their backup schedule separates rated output, short-duration overload and changeover. Those values describe the inverter; generator controls, switching equipment and protected-load design remain system-specific.
The larger worldwide WIT list includes 29.9-50K-XHU, 50-100K-HU/AU and 63-125K-XHU for specified 380, 400 or 415 V systems. Figures from the 4-25K schedules must not be transferred to those larger classes.
WIT voltage classes and UK supply
DNO approval, protection and export controls are project-specific.
These WIT families were live in Growatt’s worldwide catalogue on 23 July 2026. Current UK supply was unconfirmed across individual suffixes, AC-voltage classes and power classes.
Related entries
Manufacturer and reference sources
Brand
Reference type
Solar inverter model
Last reviewed
31 Jul 2026
Current status
UK new-supply status is unconfirmed.