Home Battery Storage Costs UK 2026
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Adding battery storage to a solar system increases self-consumption from around 30% to 70–80%, significantly improving the economics of solar panels. Most homeowners pair battery storage with existing or new solar installations.
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Solar panels typically generate most electricity during the middle of the day when many households are at work and consumption is low. Without storage, that surplus electricity is exported to the grid (via the Smart Export Guarantee) for a modest payment.
A home battery stores that surplus electricity so you can use it in the evening — when consumption is higher and solar generation has stopped. This increases self-consumption — the proportion of your solar generation that you use yourself — from around 30% to 70–80%, making the solar system much more economical.
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