Home Battery Savings Calculator
See how much a home battery could save you per year — with or without solar panels.
Your Details
UK average: ~£1,500/year
5kWh suits most homes • 10–13.5kWh for large homes/EVs
Your Savings Estimate
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Tariff Arbitrage
Charge at 7p/kWh off-peak, use at 24–28p/kWh peak. Works without solar — save £300–£500/year.
Solar Storage
Store excess solar generation for evening use. Boost self-consumption from 35% to 75%+.
5–8 Year Payback
Batteries last 10–15 years. After payback, every year of savings is pure profit.
Estimates are indicative and based on UK average electricity rates as of Q1 2026. Actual savings depend on your tariff, usage patterns, solar system orientation, and local weather. This calculator assumes one full charge/discharge cycle per day with 90% round-trip efficiency.