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Solar battery savings calculator
Estimate the annual value of shifting excess solar electricity into evening household use.
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Your estimate
Estimated annual bill savings—
Projected annual net savings
How this estimate works
Annual energy charged is estimated as usable capacity × cycles/day × days/year. Delivered energy is charged energy × round-trip efficiency. Savings equal avoided grid purchases minus the export value of solar energy used for charging. This assumes sufficient excess solar and household demand.
All results are illustrative estimates, not quotes or guaranteed savings. Enter your own tariffs and consumption data. Check your provider's current terms before making a purchase.
Frequently asked questions
Why subtract the feed-in tariff?
Solar stored in a battery might otherwise be exported, so export revenue is an opportunity cost.
Does this calculate government incentives?
No. Enter a net cost after any confirmed incentives.