Tools you might need next
Estimate daily solar energy output from system size, sun hours, and losses. Free solar panel output tool for solar, panel, and more.
Estimate wind turbine power output from rotor diameter, wind speed, and power coefficient. Free wind turbine power tool for wind, turbine, and more.
Size inverter from peak continuous load and motor surge requirements. Free inverter sizing calculator for inverter, sizing, and more.
This tool applies a standard formula from the relevant domain. The computation is deterministic — given the same inputs, the result is always identical. The formula accounts for the primary variables that determine the output.
Ah = Daily load / (DOD × System voltage × Efficiency)The calculation requires: Daily Load, Depth of Discharge, System Voltage, Round-Trip Efficiency. Each parameter contributes to the final result according to the formula above. Accuracy depends on the precision of your input measurements.
Updated: July 2026
A typical use case demonstrating the calculator with representative values.
→ Calculated result based on the formula and provided inputs
Enter your own values to get a personalized result for your specific situation.
→ Result calculated from your specific input values
Check the expected unit for each input field (shown as suffix). Converting between imperial and metric units before entering values prevents calculation errors.
Ensure denominator values (divisors) are non-zero. The calculator validates this, but understanding which fields cannot be zero helps interpret results correctly.
Size off-grid battery bank from daily load, depth of discharge, and system voltage. Free battery bank sizing tool for battery, bank, and more. It applies the calculation formula (Ah = Daily load / (DOD × System voltage × Efficiency)). For example: 5 kwh/day, 48v, 50% dod — A typical use case demonstrating the calculator with representative values.