A home battery on its own won’t power the house after a grid failure. You need an inverter with a backup output and a consumer unit that knows what should keep working at that moment. There are two approaches.
Selected circuits (EPS)
The inverter’s backup output feeds a separate sub-board for critical circuits: the fridge, the boiler or circulation pump, the router, some of the lighting, kitchen sockets. The rest of the house is off during the outage. This is cheaper and enough for most homes — the backup output (usually 3–5 kW) couldn’t carry an induction hob and an oven anyway.
The whole house (ATS)
An automatic transfer switch moves the entire installation onto battery power. It needs an inverter and battery that can handle the house’s peak load, plus a separate enclosure for the ATS. It makes sense with large batteries and electrically heated homes, where a power cut in winter is a real problem.
What goes in the consumer unit
- a battery / hybrid inverter section with a switch disconnector,
- with EPS: the supply to the critical-circuits sub-board (4 modules on the main rail + a separate enclosure),
- with ATS: a 63 A transfer unit in a separate enclosure,
- a circuit schedule that tells the electrician — and you — what is “on the battery”.
In the configurator, choose “Home battery” and the type of backup power — you’ll see the difference in price and number of modules immediately.