This solar panel reference table shows the panels needed for a range of daily energy need values, assuming a peak sun hours per day of 5 hours and a panel wattage of 400 W. Every figure is computed with the same engine that powers our Solar Panel Calculator, so the numbers are exact.
| Daily energy need | Panels needed | System size (kW) |
|---|---|---|
| 2.5 kWh | 2 | 0.80 |
| 5 kWh | 3 | 1.20 |
| 7.5 kWh | 4 | 1.60 |
| 10 kWh | 5 | 2.00 |
| 15 kWh | 8 | 3.20 |
| 20 kWh | 10 | 4.00 |
| 30 kWh | 15 | 6.00 |
| 50 kWh | 25 | 10.00 |
| 70 kWh | 35 | 14.00 |
| 100 kWh | 50 | 20.00 |
How to use this table
Find the row closest to your daily energy need and read across to the panels needed. For a value between two rows, the real figure sits between them — or enter your exact numbers in the Solar Panel Calculator for a precise answer.
Need a value that is not in the table? — the Solar Panel Calculator does it instantly, for free, with the formula and a worked example built in.
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