Off Grid Calculator

The Battery stories the energy generated from your solar panels until needed. A Battery Bank is simply a group of batteries.

Information

Name:
Date:
This information will be used if you choose to save your calculator for later use

Battery Bank Sizing

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

Step 1:

Watt Hours per Day:

Is your load (kwh) too high? Don't despair, our Knowledgeable Sales Folks can help you find other solutions that may help.

Step 2:

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

Step 3:

What is the lowest temperature your battery bank will experience?

Degrees

Results:

Select a battery bank voltage:
*All calculations assume only a 50% discharge to your batteries to optimize battery life.

Find the battery that fits your needs here.

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.

Select the State-City Closest to your location (currently only US states are provided)

or Manually enter the average sun-hours for your location.

Step 2:

The total wattage of Solar Panels that you need is:

Watts, or kilowatts

This 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 panel

Find the solar panel that fits your needs here.

You will need panels for a total of watts.

You will need a charge controller that can handle amps

Find the charge controller 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.

Now that you have sized up the system that fits your needs, call our Knowledgeable Sales Folks at 877-878-4060 and let them help you find the exact products for your system.

© 2005 - 2009 Alternative Energy Store - www.AltEnergyStore.com

Call us for solar panel system design help.
877-878-4060

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