# Is a home battery worth it without solar panels? | Eco Solar > Is a home battery worth it without solar? How charging on a cheap overnight tariff works, the Derby costs, 0% VAT, and when adding solar makes more sense. URL: https://ecosolarpanelsderby.co.uk/guide/home-battery-without-solar/ 1. [Home](https://ecosolarpanelsderby.co.uk/) 2. [Solar Battery Storage](https://ecosolarpanelsderby.co.uk/solar-battery-storage/) 3. Is a home battery worth it without solar panels? Decision Guide # Is a home battery worth it without solar panels? [Eco Solar Panels UK](https://ecosolarpanelsderby.co.uk/) fits home batteries across Derby, with or without panels. A battery on its own can make sense for some households and not others, and this guide shows how to tell which you are. Published 30 September 2026 · Updated 30 September 2026 · By Eco Solar Panels UK **Short answer:** It can be, if you are on a time-of-use tariff with cheap overnight electricity and use a lot in the evening. The battery charges cheaply at night and runs the house at peak times. On a flat-rate tariff it saves very little. In Derby, batteries cost £4,317 to £7,434 on Checkatrade's figures. ## How a battery saves money without panels Without solar panels, a home battery works on the difference between electricity prices at different times of day. On a time-of-use tariff, electricity is much cheaper for a few hours overnight. The battery charges then and supplies the house through the evening, when you would otherwise pay the full rate. On a flat-rate tariff there is no gap to use, so a battery on its own saves almost nothing. The whole case depends on the tariff. ## Working out the saving Take the price you pay for daytime or evening electricity and subtract the overnight price. That is roughly what each unit shifted by the battery saves, less a small loss for charging and discharging. Multiply by how many units you use in the evening, up to the battery’s usable capacity, and by the days in a year. For comparison, the East Midlands price cap is 25.36p per kWh for 1 October to 31 December 2026 ([Ofgem](https://www.ofgem.gov.uk/your-energy-supply/your-energy-bill/energy-price-cap-unit-rates-and-standing-charges)). Time-of-use tariffs set their own cheaper overnight rates, which vary by supplier, so check your own tariff before relying on any figure. ## What it costs in Derby Checkatrade lists solar battery storage in Derby at £4,317 to £7,434, averaging £5,640 ([Checkatrade](https://www.checkatrade.com/Search/Solar-Battery-Storage/in/Derby)). HMRC’s VAT notice includes batteries among the energy-saving materials zero-rated in homes until 31 March 2027, and says stand-alone electrical storage batteries in residential accommodation qualified from 1 February 2024 ([HMRC VAT Notice 708/6](https://www.gov.uk/guidance/vat-on-energy-saving-materials-and-heating-equipment-notice-7086)). Ask for the VAT treatment to be shown on the quote. Thinking about a battery? We size it from your meter data, with or without panels. Call for a free quote. 01332 919162 (+441332919162) ## When adding solar is the better move A battery charged only from the grid depends entirely on the tariff gap. With panels as well, it also stores free daytime power. PVGIS gives a south-facing Derby roof about 979 kWh per kWp a year ([PVGIS](https://re.jrc.ec.europa.eu/pvg_tools/en/)), most of it from spring to early autumn, so in summer the battery can often be filled from the roof and in winter from cheap overnight rates. If your roof faces south, east or west and isn’t heavily shaded, it is worth pricing panels and a battery together. The scaffold, survey and electrical work are shared, and a single hybrid inverter can run both. [Solar battery storage](https://ecosolarpanelsderby.co.uk/solar-battery-storage/) covers the options, and [How much do solar panels cost in Derby?](https://ecosolarpanelsderby.co.uk/guide/solar-panel-cost-derby/) covers the panels. ## Who a battery-only setup suits A battery without solar tends to suit homes with a north-facing or heavily shaded roof, flats without roof access, and households on a time-of-use tariff who use a lot of electricity in the evening, such as those with an electric car or electric heating. For most houses with a usable roof, panels and a battery together make a stronger case. ## Bottom line A battery without solar only pays if your tariff has a big gap between cheap overnight and daytime prices and you use a lot in the evening. Batteries in Derby cost £4,317 to £7,434 on Checkatrade's figures, with 0% VAT. If you have a suitable roof, adding panels usually improves the numbers. Call 01332 919162 (+441332919162), 9am to 7pm, 7 days. ## Questions people also ask ### How does a battery save money without solar? It charges from the grid when electricity is cheap, usually overnight on a time-of-use tariff, and powers the house when electricity is dearer. The saving on each unit is the gap between the two prices, minus a small loss in the battery. ### Can I add solar panels to a battery later? Usually, yes. With a hybrid inverter, panels can often connect to the same inverter later. With an AC-coupled battery, the panels get their own inverter. Tell the installer if solar is likely, so the battery is chosen with that in mind. ### Does a battery without solar get 0% VAT? HMRC's notice says the zero rate for energy-saving materials in homes includes batteries, with a specific rule that stand-alone electrical storage batteries in residential accommodation qualified from 1 February 2024. Ask the installer to confirm the VAT treatment on your quote. Related service [Solar Battery Storage](https://ecosolarpanelsderby.co.uk/solar-battery-storage/) Keep the daytime power your panels make for the evening. Fitted with a new system or added to panels you already own, sized from your meter readings. [View service](https://ecosolarpanelsderby.co.uk/solar-battery-storage/) Talk it through Lines open Monday to Sunday, 9am to 7pm. 01332 919162 (+441332919162) ## More guides - [Decision Guide How much do solar panels cost in Derby?](https://ecosolarpanelsderby.co.uk/guide/solar-panel-cost-derby/) - [Decision Guide Is this a good solar quote?](https://ecosolarpanelsderby.co.uk/guide/check-a-solar-quote/) - [Learn Can I charge my electric car from solar panels?](https://ecosolarpanelsderby.co.uk/guide/charge-electric-car-with-solar-panels/) - [Learn Are plug-in solar panels worth it?](https://ecosolarpanelsderby.co.uk/guide/plug-in-solar-panels/)