• STEP 1

  • Building Your Off-Grid Solar System

  • You can calculate your daily electricity usage in Watt-hours by identifying the wattage ratings of the appliances and how many hours you intend to run them each day. For example, a single 50 Watt fan operating for 3 hours per day will result in 150 Wh per day (50W x 3 hours = 150Wh).

    Additional note: appliances with large power draws, such as air conditioners and refrigerators, may require many solar panels and special DC-AC inverters to operate. Please contact a Grape Solar customer service representative to learn more.
    Solar panels produce more power in the summer and less in the winter. For example, if you only need power during the summer months, your solar system would require less panels than a system that needs to provide adequate power year-round. This is due to decreased solar production during winter months. Please contact a Grape Solar customer service representative to learn more.
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  • STEP 2

  • Sizing Your DC/AC Inverter

  • The amount you enter is the minimum recommended inverter size.

    Example: If you want to run a 50-watt LED light and a 1500-watt blow dryer at the same time, you would need a DC/AC inverter that is rated to handle more than 1,550 watts (1,500w + 50w = 1,550w peak watt usage). In other words, the result will be the minimum wattage rating we suggest for your DC-AC inverter, otherwise you won’t be able to simultaneously power all of your electronics.

    Please contact a Grape Solar customer service representative to learn more.
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Disclaimer: This calculator is intended to be used as a very rough estimation tool by averaging solar data across the continental U.S. mainland. A Grape Solar customer service representative can provide more information on how to obtain a more customized quote. Contact us here.