Utility Bill to Savings Estimate

Takes the numbers from a customer's utility bills and the owner's proposed system details, then works out an estimated yearly and monthly savings the customer can understand.

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Before and after

BEFORE · what the owner typed

need savings estimate for Marcia Cruz, 2366 Otterbury St, Frostbrook. we are Quailbury Solar. she sent 6 months of bills. kwh by month: 820, 760, 690, 710, 880, 940. total charged each month: 164.00, 152.00, 138.00, 142.00, 176.00, 188.00. fixed charge is 12.00 a month, its on every bill. rate she pays is 0.20 per kwh. system is 6.4 kW, yearly production 9,100 kwh from our design. price 18,500, and she told me a 2,000 utility rebate, it is listed on our quote. call Mark Haddad at 206-555-0196. her last name on the account is Cruz but she goes by Marcia.

AFTER · what the skill produced

Hi Marcia Cruz,

Thank you for sending your bills. Here is our savings estimate for 2366 Otterbury St, Frostbrook. These are estimates based on the numbers you gave us, not a guarantee.

Your bills (6 months provided)

Total electricity used: 4,800 kWh
Total charged: $960.00
Average monthly use: 800 kWh

Scaling to a full year
We only had 6 months, so we doubled the totals to estimate a full year. That gives about 9,600 kWh per year. Winter and summer months can differ, so this may be less accurate than 12 months of bills. If you can send the other 6 months, we will refine it.

Rate we used
$0.20 per kWh, the rate you pay. The $12.00 monthly fixed charge stays on your bill with or without solar, so we did not count it as savings.

System coverage

Proposed system: 6.4 kW
Estimated yearly production from our design: 9,100 kWh
Estimated yearly use: 9,600 kWh
Coverage: 9,100 divided by 9,600 is about 94.8 percent

Estimated savings

Yearly: 9,100 kWh times $0.20 = $1,820.00
Monthly average: $1,820.00 divided by 12 = about $151.67

Simple payback

System price: $18,500.00
Utility rebate listed on our quote: $2,000.00
Price after rebate: $16,500.00
$16,500.00 divided by $1,820.00 = about 9.1 years

Please confirm the rebate, how your utility credits solar production, and any tax questions with your utility and a tax professional. We cannot answer those for you.

Questions? Call Mark Haddad at 206-555-0196.

Questions for the owner

Do you have the other 6 months of bills for Marcia Cruz so we can use a full year?
Should the estimate include any yearly rate increase assumption? None was given, so none was used.

What it does

Takes the numbers from a customer's utility bills and the owner's proposed system details, then works out an estimated yearly and monthly savings the customer can understand. It shows the math so the customer can see where each number came from.

Use it when: Use when a solar company needs to turn a customer's utility bill numbers into a plain-English savings estimate, such as: estimate savings from this bill, what would this customer save with solar, or run the numbers from their electric bill.