How Many Batteries Do I Need For My Solar Panels

It s usually a good idea to round up to help cover inverter inefficiencies voltage drop and other losses.

How many batteries do i need for my solar panels.

For this system you would need seven 75 watt solar panels and four 300 amp hour batteries. So in the case above to achieve my 9600 watts a day i would need sixteen 100 watt panels. Using the 2400 daily watt hour figure from the above example you would divide the 2400 by 375 and need 6 4 panels. For the 9600 watt system i need sixteen 100 watt panels and four 200 ah batteries.

They can even be connected together for a doubling of capacity. If you were using 200 watt panels you would need only three panels and four 300 amp batteries. You may want to consider 600 800 amp hours of capacity based on this example depending on your budget and other factors. Now of course this will depend on the wattage of your panels but you should be getting a better idea of what you need to power your setup.

Think of this as the minimum battery bank size based on your typical usage.