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.

How many batteries do i need for my solar panels.

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

Always round this off to the higher number. Batteries can be found in sizes ranging from under 2 kwh up to 16 kwh or more. You may want to consider 600 800 amp hours of capacity based on this example depending on your budget and other factors. What this means is that to meet the typical energy needs for this time frame you will need a battery that is around 10 kwh in capacity with a power rating of at least 5 kw.

If you were using 200 watt panels you would need only three panels and four 300 amp batteries.