FOX ESS P3-8.0-SH - three-phase hybrid inverter 8 kW.

FOX ESS P3-8.0-SH is a three-phase hybrid inverter rated at 8 kW, two MPPT inputs, a high-voltage LiFePO₄ battery in the 100–800 V range, three CAN channels, generator support. Efficiency 97.7%, nominal output current 12.1 A per phase. IP65, 5-year warranty.

Eight kilowatts: headroom for EV charging

An 11-kilowatt three-phase charging station is the typical choice for home EV charging, and it spreads load across three phases at roughly 3.7 kilowatts each. Eight kilowatts of inverter rating gives margin for the house and charging to run simultaneously without overload.

The most interesting scenario is daytime charging from solar surplus. If the car is at home during the day even a few times a week, charging from the panels turns solar energy directly into kilometres driven at no cost to the grid.

This requires automation that sees current generation and controls the charger's power. The inverter publishes that data over Modbus, so linking it to a charging station is technically straightforward.

The eight-kilowatt rating also leaves headroom for the future: if a family later buys a second electric car or extends the house, the unit already has a capacity reserve without needing replacement.

Technical specifications

• rated power 8 kW, three phases 380/400 V;

• two MPPT inputs, tracking efficiency above 99%;

• MPP range 120–950 V, maximum input voltage 1000 V;

• high-voltage LiFePO₄ battery, range 100–800 V;

• BMS communication: three CAN channels;

• efficiency 97.7% peak, 97.2% European weighted;

• output current 12.1 A nominal, 13.3 A maximum;

• generator support, THD below 3%;

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

• mass 34 kg, 5-year warranty.

Priorities between house, battery and car

An eight-kilowatt hybrid serves three competing tasks: powering the house, charging the home battery and charging the car. A sensible sequence is self-consumption first, then the home battery to its reserve level, then the car.

The home battery is your protection against an outage and should always be charged. The car, by contrast, has its own large store and tolerates an incomplete daytime charge — this logic is worth setting in the system configuration during commissioning.

Wide battery range and generator

The 100–800 volt range and three CAN channels allow battery capacity to be grown in stages, and generator support covers long winter outages when there is not enough sun to cover both the house and car charging at once.

Protection and compactness

An integrated DC switch, type II surge protection on both sides and all-pole residual current monitoring operate across all three phases simultaneously, removing the need for extra external boxes on the wall.

A mass of 34 kilograms allows one-person installation on an ordinary interior wall, and passive cooling with no fans means no moving parts wear out over years of continuous operation.

Eight kilowatts is the balance between powering the house and charging an EV on a three-phase supply. Write to us with your car model and daily mileage: we will calculate the battery and show how many kilometres a year you can drive on your own sunlight.