What size solar battery do I need in the UK?

The right size of solar battery for a home in the UK – that is, the capacity of the battery system – will depend on a variety of factors, including:

  • How much electricity your solar panels generate
  • How much electricity you use during the day
  • How much electricity you use at night
  • Whether you want to simply reduce your energy bills or go completely off-grid

Most solar batteries have a capacity of 10kWh . Typically, UK households use between 8.5 and 10kWh of electricity per day, so if you’re looking to reduce energy bills, one battery should be enough, although this will depend on your household’s energy use. If you’re planning to go off-grid, multiple batteries may be required to maintain an electricity supply through several days of bad weather.

A solar battery is the perfect addition to a home solar photovoltaic system, such as the Marley SolarTile. That’s because a solar battery will store unused electricity during the day, so you can use it in the evening after the sun has gone down.