A home battery cannot move every charged kWh to the expensive period. Enter usable capacity, round-trip efficiency, cycles and the low and high rates. GharGanit reports input energy, delivered energy and gross rate-spread value before purchase cost, degradation or financing. This prevents a common mistake: multiplying full nameplate capacity by the high rate while ignoring charging cost and losses.
Use the current bill or tariff sheet, exact product label, location-specific solar estimate, or measured project dimensions. Example physical values teach the tool; zero money rates prevent an unsourced price from becoming a default claim.
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Every input includes a simple explanation.
Private: calculations run in your browser; a saved scenario stays on this device.
Battery degradation, reserve settings, power limits, taxes, installation cost, programme payments and export rules are excluded.
A 10 kWh usable battery cycled 250 times delivers 2,500 kWh; at 88% round-trip efficiency it needs about 2,841 kWh of charging input.
Source links establish context or measurement relationships. Your personal rate and project values remain your inputs.
Australian Government
Battery planning and safety context; calculator losses remain editable.
Open official resourceU.S. Department of Energy
Independent home-efficiency guidance.
Open official resourceEuropean Commission Joint Research Centre
Location-specific PV production estimates for user-entered solar scenarios.
Open official resourceEnergy Efficiency and Conservation Authority
Independent solar planning guidance.
Open official resourceEstimate delivered battery energy, charging input and gross tariff-spread value before payback claims.
Separate solar electricity used at home from exports and value each with its own rate
Open calculator Working shownEnergy bills & appliancesTime-of-Use Electricity Plan ComparisonCompare peak and off-peak energy charges with a flat-rate plan using the same electricity use
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