What size battery do I need?


How to determine the amount of solar battery storage for your home? Easy, get your most recent winter bill and see how much solar power you exported. This usually shown on your bill as ‘solar exports’ or ‘feed-in value’ and expressed in kWh. Divide this number by the number of days in that billing period, which gives your final value. The final value is the amount you exported to the grid i.e. did not consume within your household. Important, do not install a large solar battery storage system than what you can fill with the excess power – don’t over invest, unless you’re considering future requirements, such as additional solar panels, going off grid…etc Solar Battery sizing table: Daily winter export to grid in kWh Recommended Battery Size Between 2 kWh and 4 kWh 4.8 kWh Between 4 kWh and 7 kWh 7.2 kWh Between 7 kWh and 10 kWh 9.6 kWh Between 10 kWh and 12 kWh 12.0 kWh Between 12 kWh and 14 kWh 14.4 kWh Greater than 14 kWh 16.8 kWh How does it work? Review at your last mid-winter electricity bill to determine your existing daily solar system export to the grid in kWh. Select the [...]