How Many Batteries Do I Need To Run A Refrigerator. Here are example battery banks for both lead acid and Lithium based on an off-grid home using 10 kWh per day. The best size solar panel for running a 12-volt fridge is 150-watts with a 200-watt battery.
Option using 19 kWh daily turned into watts first for simplicity. If you are using a lithium battery you need 5252 Ah battery to run the same fridge for two days. That many amps would require a massive bank of batteries to operate.
6 amps at 72 hours is about 580 amp hours for a battery load so thats like 4 batteries depending on size.
Do not connect many batteries in parallel as it is detrimental to battery health. Freezer uses 120 watts an hour. You need a lead-acid battery of 104 Ah to run an efficient top-loading fridge for two days. The wattages given below are estimates.
