GoodWe GW25K-ET - three-phase hybrid inverter 25 kW.

GoodWe GW25K-ET is a three-phase hybrid inverter rated at 25 kW with two MPPT inputs and a high-voltage LiFePO₄ battery at 180–600 V. Efficiency 98.2%, nominal output current 36.1 A per phase, three CAN channels, generator support. IP65, passive cooling, 5-year warranty.

Twenty-five kilowatts for agriculture

The agricultural sector is one of the most frequent buyers of inverters in this class, and the reason lies in the very nature of farm loads. Irrigation pumping stations, grain dryers, cold stores for vegetables and fruit, ventilation for livestock buildings — all of these are powerful three-phase motors that switch on periodically but immediately at full power.

An irrigation pump for several hectares can draw 10–15 kilowatts at a time. Add a dryer in the harvest season, or the compressors of a cold store, and fifteen kilowatts is no longer enough.

The second argument is that the seasonality of the sun and of the load itself often coincide. Peak irrigation demand falls in the sunniest months of the year, so an array sized for twenty-five kilowatts works precisely when its output is highest.

Technical specifications

• rated power 25 kW, apparent power 25000 VA, three phases 380/400 V;

• two MPPT inputs, tracking efficiency 99.9%;

• MPP range 200–850 V, maximum input voltage 1000 V;

• LiFePO₄ battery 180–600 V, nominal voltage 500 V;

• BMS communication: three CAN channels;

• efficiency 98.2% peak, 97.8% European weighted;

• output current 36.1 A nominal, 39.7 A maximum;

• generator support, THD below 3%;

• IP65, passive cooling, up to 4000 m, -25 to +60 °C;

• dimensions 415 × 516 × 180 mm, mass 24 kg, 5-year warranty.

Autonomy for a remote field

A pumping station or dryer is often located far from the nearest substation, and grid quality there is not always stable — voltage sag at the end of a long line occurs regularly, especially on peak summer days when everyone irrigates at once.

The battery in such a system serves not only a backup function but a stabilising one too. It smooths grid voltage fluctuations, absorbing short-term peak loads itself while the grid recovers.

For a site without permanent staff this matters particularly: the system decides for itself when to draw from the grid, when from the battery, and when to start the backup generator, requiring no manual operator intervention.

Starting current headroom

The difference between nominal and maximum current is 3.6 amperes per phase — about ten per cent. For an agricultural site this is not a secondary figure.

Large pumps carry a substantial starting surge that can exceed the running current fivefold for a fraction of a second. Without headroom the inverter goes into protection and the pump simply fails to start — and this is especially unwelcome on a hot day, exactly when irrigation is needed most.

For large pumps it is worth considering a soft starter or a frequency converter — inexpensive relative to the cost of the whole system, but it removes the burden of the starting current entirely and extends the life of both the pump and the inverter.

Three CAN channels and seasonal capacity planning

Independent BMS channels allow the battery to be grown in stages. For a farm this is particularly apt: the real backup requirement only becomes visible after a first full season — spring sowing, summer irrigation, the autumn harvest.

You can start with a baseline capacity covering the overnight reserve and short grid sags, then add a second stack after the first season for expanded needs — without replacing the inverter and without stopping a system already in service.

Twenty-five kilowatts is the level that withstands real agricultural load with its sharp peaks. Describe your pumps and equipment, and the distance to the substation: we will calculate the battery configuration and check whether a soft starter is needed.