Please add Time of Use in calculating accurate solar system size and provide more accurate financial information

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DougRs
Please add Time of Use in calculating accurate solar system size and provide more accurate financial information

I am in California where our utility company has us on a Time of Use (TOU) billing plan. During the day the we use the least amount of power and the power company will pay us $0.45 kWhr. In the evening and weekends when we are charged $0.12 kWhr is when we use the most electricity. This means for every Kwhr the power company purchase from us at $0.45 we can buy it back for $0.12. The software currently only models for yearly kwr offset and when it should be calculating the yearly financial offset of solar. With our power company paying over 3 times for kWhr what we buy have to buy it for we could get by with a solar system that would be one-third the size of the number of kWhr we need per year.

Can you add the feature to factor in TOU?

Paul Gilman

Dear Doug,

SAM's Residential, Commercial, and Third Party Financing financial models support electricity rate structures with time-of-use rates for both energy and demand charges on the building owner's electricity bill. Please see the Electricity Rates and Bill Savings for Residential and Commercial Projects in SAM 2017.1.17 webinar recording for more details:

https://sam.nrel.gov/node/74846

For links to other webinars, see https://sam.nrel.gov/webinars.

Best regards,
Paul.

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