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    Construction & Electrical

    Battery Runtime Estimator

    Estimate battery runtime for loads entered in watts (W) or amperes (A) with operating voltage and usable battery energy. Choose watts or amperes. If using A, the load power is current × load operating voltage. Battery Ah ratings and age may change actual runtime. This browser-local calculator updates from numeric inputs and shows a labelled breakdown without uploading your data.

    MAKE IT SIMPLE
    Calculation assumptions

    W uses entered power directly. In A mode, load watts = current (A) × separate load operating voltage (V). Battery Wh = nominal battery V × Ah. Inverter efficiency and usable discharge are applied to battery energy.

    Result

    Worked examples

    Battery voltage (V) 12 · Capacity (Ah) 100 · System efficiency (%) 85 · Usable discharge (%) 80 · Constant load (W) 200

    First calculated quantity: 1200.00 Wh

    Estimate battery runtime for loads entered in watts (W) or amperes (A) with operating voltage and usable battery energy. Choose watts or amperes. If using A, the load power is current × load operating voltage. Battery Ah ratings and age may change actual runtime.

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