Solar Battery Storage in Birmingham

Solar battery storage in Birmingham lets you keep the power your panels make during the day and use it after dark. Without a battery, anything you don’t use at the moment it is generated goes out to the grid. With one, it is stored and used in the evening, when most homes use the most electricity.

The size of battery that makes sense depends on your household, not your roof. A family that is out at work and school all day uses most of its power in the evening, so a battery earns its keep. A household that is at home in the daytime already uses much of its solar as it is made, so a battery adds less.

How much a battery costs

The Energy Saving Trust puts home battery prices between £1,500 and £10,000, with a 5 kWh system at around £4,600. Checkatrade lists Birmingham battery installs at £4,240 to £7,207, with an average of £5,503. The Energy Saving Trust also says you should save money by fitting a battery at the same time as solar panels, because the electrician’s time and some of the equipment are shared.

Home installation is zero-rated for VAT until 31 March 2027 under HMRC’s rules for energy-saving materials. Solar Energy UK says batteries fitted with solar qualify, and that home batteries installed on their own should be zero-rated too. The cost guide puts battery prices next to panel prices.

How big a battery should be

Battery capacity is measured in kilowatt hours. The Energy Saving Trust says a typical home system might be 10 kWh. The right figure for you comes from how much electricity you use between late afternoon and the next morning. A recent bill, or the half-hourly figures from a smart meter, is enough to work it out.

Season matters too. PVGIS puts a 4 kWp south-facing system in Birmingham at about 476 kWh in July and 136 kWh in December. In summer a battery fills easily. In winter, the panels may not produce enough surplus to fill a large one, which is why the biggest battery available is rarely the best value. The solar panel calculator includes a battery option so you can see the difference.

Batteries with new panels or on their own

If you are fitting panels, the neatest route is a hybrid inverter, which handles both the panels and the battery in one box. If you already have panels, the battery can usually be added on the AC side without touching what is on the roof. Adding a battery to existing solar panels covers that job, and does adding a battery affect your Feed-in Tariff? covers older systems still paid under the scheme.

A battery can also be fitted without solar panels at all, charging from a cheaper overnight tariff. That can suit flats and homes where the roof isn’t suitable. Every battery connected to the grid has to be registered with National Grid Electricity Distribution, under the same G98 and G99 rules as solar panels.

Where the battery goes

The Energy Saving Trust describes a typical battery as about 100 by 60 by 25 centimetres, a little taller and wider than a washing machine but much less deep. Most go in a garage, utility room or cupboard, close enough to the consumer unit to keep the cable run short. The survey agrees the location before anything is ordered.

If you are also thinking about an electric car, plan the two together. EV charger installation explains how a charger can share the same spare solar.