I put together the following battery state-of-charge chart which indicates the state-of-charge (percent) as it relates to battery voltage or specific gravity. Voltages and Specific Gravity are listed for a 6-volt or 12-volt battery, and battery banks of 24 and 48.
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Required battery specifications include: 1) capacity, expressed in kilowatt-hours (kWh), 2) voltage rating, typically ranging from 48V to 800V, 3) chemistry type, most commonly Lithium-ion, and 4) charge/discharge efficiency, ideally above 90%.
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LiFePO4 Battery Pack: Multiple cells combined to boost voltage (series) or capacity (parallel)., 24V for solar inverters, 48V for EVs).
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Ensure your inverter and battery are properly matched by checking voltage, current draw, and required battery capacity. Formula: Battery Capacity (Ah) = (Inverter Power × Runtime) ÷ (Voltage × Efficiency).
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