This battery bank size reference table shows the battery capacity needed for a range of daily energy use values, assuming a days of backup of 2, a depth of discharge of 5% and a battery bank voltage of 12 V. Every figure is computed with the same engine that powers our Battery Bank Size Calculator, so the numbers are exact.
| Daily energy use | Battery capacity needed |
|---|---|
| 500 Wh | 167 |
| 1,000 Wh | 333 |
| 1,500 Wh | 500 |
| 2,000 Wh | 667 |
| 3,000 Wh | 1,000 |
| 4,000 Wh | 1,333 |
| 6,000 Wh | 2,000 |
| 10,000 Wh | 3,333 |
| 14,000 Wh | 4,667 |
| 20,000 Wh | 6,667 |
How to use this table
Find the row closest to your daily energy use and read across to the battery capacity needed. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Battery Bank Size Calculator for a precise answer.
Need a value that is not in the table? — the Battery Bank Size Calculator does it instantly, for free, with the formula and a worked example built in.
Related calculators
Continue exploring energy calculators with these tools: Generator Fuel Consumption Calculator, Solar Panel Calculator, Solar Savings Calculator, Solar Payback Period Calculator, Generator Size Calculator.