Monday, December 22nd, 2014 - 12:45 pm 
(Arizona time)
Updated January 26, 2014

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

National Renewable Energy Lab (NREL) PV Watts Page



Solar Water Savings
Solar Water Savings

By installing a solar water heater, the state’s desert homeowners could save between 50% and 90% on their hot water bill.  This section allows the creation of a "personalized" chart that estimates monthly savings and cash flow based on financing a solar system as part of a home loan.

Solar Water Saving Page


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EPA ENERGY STAR Portfolio Manager®

EPA ENERGY STAR Portfolio Manager® is an online tool to measure and track energy and water consumption, as well as greenhouse gas emissions. The tool can be used to benchmark the performance of one building or a whole portfolio of buildings. Any type of non-residential building can be benchmarked. All you need are your energy bills and some basic information about your building.

EPA ENERGY STAR Portfolio Manager® Website


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Solar Suitability

Arizona homeowners can now instantly find their home's solar potential with the click of a mouse. Sun Number has taken all of the guesswork out of solar analysis by combining high-resolution aerial data, mapping software and advanced algorithms into an easy-to-use online platform. By simply inputting your address, you can get a Sun number score and find out how much a PV system could save you in utility costs each year. The Sun Number score represents the solar suitability of a building's rooftop on a scale from 1 to 100, with 100 being the ideal rooftop for solar.

Get Your Sun Number

AzSC Blog

Partial Eclipse of the Sun: The Good Solar vs Bad Solar Conflict

Earthwise, Solar Choice and Solar Partners are just some of the marketing catchphrases and program names that have characterized utility solar programs in Arizona since 1997.

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