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SolarCity's building scientists are passionate about using the best technologies to evaluate your home. The data gathered during your Home Energy Evaluation is entered into our proprietary software tool to holistically assess your energy consumption. We employ the principles of building science, modeling the dynamics of air flow and moisture.

Where others make recommendations using data gathered only from the hottest and coldest days of the year, our technology utilizes sub-hourly simulations for an entire year.

We take the data gathered from your audit and construct a 3-D model of your home and place it into a weather simulation utilizing U.S. Department of Energy weather and solar data from every 15 minute interval throughout the year to accurately assess your home's true energy needs and year-round saving calculations.


Our model looks at how your home works as a system; we consider how much heat is generated by appliances as they are running, lighting, even the people who live in your home. Over 4 billion calculations go into creating a one-of-a-kind proposal that provides you accurate annual savings calculations.

This proposal then helps identify the greatest opportunities for energy savings tailored specifically to meet the needs of your family and your home.


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