Offgrid Solar PV System Calculator
Battery Calculations
Step 1
Total Watt Hours per day:
Step 2
How many days of backup power do you want in case of cloudy/rainy days?
Results
Battery Bank Capacity: watt hours
Select a battery bank voltage:
Battery Bank Capacity: amp hours
Solar Panel/Controller Sizing
This calculator helps you size the solar panel(s) and charge controller(s) needed for your system.
Step 1:
You need to determine the average number of sun hrs per day.
Manually enter the average sun-hours for your location.
hoursStep 2:
The total wattage of Solar Panels that you need is:
Watts, or kilowattsThis value takes into account losses due to system inefficiencies.
Step 3:
How many solar panels do you need? That depends on the panel you choose.
Select the wattage of the panel your interested in, and see the results below:
watts per panelResults
You will need panels for a total of watts.
You will need a charge controller that can handle at least amps
Find a solar panel that fits your needs here.
Find a charge controller that fits your needs here.
Find an inverter that fits your needs here.
Sizing a charge controller can be complex, the above answer is a conservative estimate. Please feel free to call us to find a more accurate fit for your needs.
