18 kWh Home Battery with Hybrid Inverter, Three-Phase

Four modules of 4.5 kWh under the T10 inverter, together 18 kWh. Compare that with the single-phase range: there, four modules of 9.3 kWh get you to 37.2 kWh. This three-phase setup shows how finely you can adjust with smaller modules when 37 kWh is too much for your situation and 13.5 kWh too little.

Suits a household with a heat pump and an EV charger that still does not want to sit at the top of the range, for example a family that is home a lot, has plenty of solar panels and uses a fair amount in the evening and at night. For a small household without a heat pump or a car this is more than enough, and probably more than needed.

The datasheet for the 4.5 kWh module lists the T10 with a range up to six modules. With four modules you stay below that, so there is even room to expand further without replacing the inverter.

The price is the inverter plus four battery modules together, rounded down. You pay no more than ordering separately, only everything has already been worked out for you.