How do I calculate how many batteries I need ...
How many Batteries do I need? To answer this, you need to know your power consumption rate, how long you run it for, and much reserve you want for rainy days. Let''s say you look at your monthly power bill and it says you consume on average 892 kWh in 31 days. So, 892/31/24 = 1.2 kWh/hr