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Off Grid Calculator

Battery Bank Sizing

This calculator will help you size the battery bank for your system.

Step 1

Your Daily Energy Usage


This value is usually printed on your electric bill. Take your monthly kilowatt-hour usage from your electric bill and divide it by 30 to get your daily kilowatt-hour usage. Since it's in kilowatt (1000's of watts) you'll need to multiply that number by 1000 to get the number into watt-hours.

Step 2

How Many Days Should Your System Run without Sun?

How many days of backup power do you want in case of cloudy/rainy days?

(when your solar panels will produce little energy)

Step 3

Adjust the Effective Capacity of Your Battery Bank Due to Low Temperatures

What is the lowest temperature your battery bank will experience?

Results:

Battery Bank Capacity: 0 watt hours

Select a battery bank voltage

Battery Bank Capacity: 0 amp hours
3 String Configuration: 0 amp hours per string

Solar Panel and Solar Charge Controller Sizing

This calculator helps you size the solar panel(s) and charge controller(s) needed for your system.

Step 1

Determine the Solar Exposure for Your Site

Step 2

The total wattage of Solar Panels that you need is:

0 Watts, or 0 kilowatts

Step 3

How many solar panels do you need? That depends on the panel you choose.

Select the wattage of the panel you're interested in, and see the results below:

You will need 0 panels for a total of 0 watts.

You will need a charge controller that can handle:

You will need a charge controller that can handle: 0 amps.

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