Tiny House Battery Bank Calculator

Planning tool—not a final electrical design. Verify every battery, inverter, BMS, charger, conductor, fuse, and temperature limit against the exact manufacturer manuals and applicable electrical requirements before buying or building.

The battery calculator may recommend a larger system than the solar calculator because it sizes stored energy across your chosen backup days and accounts for usable depth of discharge, inverter and conversion losses, cold-temperature capacity, aging reserve, and current constraints—not only daily energy use.

Need help turning those assumptions into a plan? Read the step-by-step tiny-house battery sizing guide, then work through the calculator below.

Peak-power limitation: Imported daily energy can size storage, but it cannot establish running or starting power. Replace aggregate imports with actual appliance power profiles before relying on current, inverter, BMS, conductor, or voltage-drop screens.

Affiliate disclosure: TinyHouseGrid participates in the Amazon Services LLC Associates Program. If you buy through qualifying links shown after the technical results, TinyHouseGrid may earn a commission at no extra cost to you. Category links are planning starting points, not proof that a product meets your calculated limits.