Battery amp-hours alone do not determine runtime. Voltage turns amp-hours into nominal watt-hours, while discharge limits and inverter losses reduce usable energy. This tool keeps every step visible and reports a planning runtime for the connected average load. Product limits, surge power, battery chemistry, temperature and age still need to be checked before choosing equipment.
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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This is an energy runtime estimate, not a guarantee. High discharge rates, temperature, aging, standby demand and cutoff voltage can reduce runtime.
A 48 V, 100 Ah bank at 80% usable discharge and 90% efficiency supplies about 3.456 kWh before dividing by the load.
Source links establish context or measurement relationships. Your personal rate and project values remain your inputs.
International Electrotechnical Commission
Authoritative electrical terminology reference.
Open official resourceAustralian Government
Battery planning and safety context; calculator losses remain editable.
Open official resourceU.S. Department of Energy
Independent home-efficiency guidance.
Open official resourceEstimate deliverable shifted energy and gross rate-spread value after round-trip losses
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