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  • Solar Calculators

    Use these tools to see what size system you might need and how much solar will save you!


    Use the Tucson Electric Power (TEP) calculator to find out how much money a solar photovoltaic (PV) system on your home can save you.

    NREL's PVWatts™calculator determines the energy production and cost savings of grid-connected photovoltaic (PV) energy systems throughout the world. It allows homeowners, installers, manufacturers, and researchers to easily develop estimates of the performance of hypothetical PV installations.  Calculator provided by NREL (National Renewable Energy Laboratory).

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    Solar One Stop

    A partnership of Pima County,
    the City of Tucson.

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    Pima County
    Development Services
    (520) 724-6490 

    City of Tucson
    Planning and Development
    Services Department
    (520) 791-5550

    201 N. Stone, 1st Floor
    Tucson, AZ 85701