Large Power Stations from 2,000 Wh

Large models with 2,000 to over 5,000 Wh often offer 2,400 to 4,000 W of continuous output and sometimes 230 V sockets rated at 16 A. They bridge longer power cuts for selected devices, supply motorhomes without hook-up, or serve as a mobile power source on building sites and at events.

Some manufacturers offer connection solutions that supply selected household circuits during a power cut. Such solutions must be installed by a qualified electrician – a power station must never be fed into a household installation via a male-to-male plug cable, as this is potentially fatal.

In this class, weight and connections become more important than pure capacity.

Assumptions: fridge averaging 50 W, chest freezer averaging 40 W, router and phone charging 20 W, heating circulation pump with controls 60 W. Together that is about 170 W, so roughly 4 kWh over 24 hours. A 2 kWh power station can therefore keep these devices running for roughly ten to eleven hours, and a 5 kWh unit for about a day. The heating should only be supplied via a professionally installed feed-in connection. The figures are example assumptions – ideally, measure your devices beforehand with a plug-in energy meter.

If you have a rooftop PV system, you may wonder whether a large power station can replace a permanently installed home battery. In short: only to a limited extent. A home battery is integrated into the household installation, automatically increases self-consumption and – depending on the system – can provide a backup power circuit. A power station is more flexible and mobile, but must be connected professionally to supply the house.