Does a heat pump work in a power cut?

What stops

• The heat pump itself: the compressor, fan and pumps all need mains power.
• Your radiators or underfloor heating, because the water is no longer being heated or pumped.
• Hot water production. Water already in the cylinder stays warm for a few hours.

Most homes lose heating in a power cut, whatever they use. See does my boiler work in a power cut for gas and oil.

Can a home battery run a heat pump?

Usually only for a short time, if at all. Heat pumps use a lot of power compared with lights, a fridge and a router. Many backup systems are set up to cover only some circuits. Ask your installer exactly what your battery would keep on. See solar panels and batteries in a power cut.

A simple plan to stay warm

1. Pick one small room with a door. This is your warm room.
2. Keep spare blankets, coats, hats and socks there.
3. Share the room at night so you keep each other warm.
4. Eat and drink regularly. Warm food and drinks help, if you have a safe way to heat them.

Check on people who feel the cold first

Babies, older people and anyone unwell feel the cold more. If someone relies on medical equipment that uses power, join the free Priority Services Register with your energy supplier and network operator.

Questions people ask

Related guides

• Does my gas boiler work in a power cut?
• Do solar panels and home batteries work in a power cut?
• How do I cook in a power cut?