Thinking about going solar? Once you connect your solar PV system to the grid, you receive credit for electricity you provide to the grid – a system called net energy metering. Your electric rate structure also changes so that you are charged (or credited) differently depending on the time of day. Kilowatt-hours used (or produced) weekdays from 11am-6pm would have a higher value than those used (or produced) at other times.

Use this calculator to estimate your new electric bills after going solar.

1. Enter your address

This will allow us to estimate solar production at your exact location.

2. Upload your greenbutton data (XML File)

Your Green Button data shows your energy consumption patterns over time. You can download it by accessing your SDG&E account.

1. Log in to your SDG&E account.

2. Click on the 'My Energy' tab and then on the 'My Energy Overview' underneath the My Energy tab.

4. From the dropdown menu that appears, select 'My Energy Use'.

5. Click on the Greenbutton icon.

6. Choose your electric meter with a date range covering the last year.

7. Open the ZIP file so that you can upload the XML file to this web page.


3. See your current consumption and potential solar production

4. Your estimated Monthly Bill With a Solar PV System

Before we can estimate your electricity bills, please answer a few questions. First, enter your climate zone. If you don't know what climate zone you live in, check here or look at the Electric Service section of your SDG&E bill.

Second, how do you heat your home? If you have a natural gas-burning furnace or you’re not sure, select “natural gas”.

Finally, do you receive any discounts on your bill? Discounts available to SDG&E customers are the California Alternate Rates for Energy (CARE) Program and the Family Electric Rate Assistance (FERA) Program.

Total Annual Estimated Current Electric Bill: $-
Total Annual Estimated Electric Bill with Solar PV System: $-
Total Annual Electric Bill Savings: $-
Estimated Optimal System Capacity:

5. Optional advanced options

In the above calculations, we have chosen a solar PV system size that produces 80% of your annual electricity consumption. This is the recommended size for a single-family home rooftop system. We have also assumed optimal tilt and azimuth for your system.

If you have more precise information on these variables (for example, from a solar contractor’s bid), you can recalculate your estimated bill by entering new assumptions in the boxes below. Otherwise, just skip to the next section.

System Size (kW) Azimuth (degrees) Tilt (degrees)
Total Annual Estimated Current Electric Bill: $-
Total Annual Estimated Electric Bill with Solar PV System: $-
Total Annual Electric Bill Savings: $-

6. What if peak billing hours change?

You may be wondering how your bills would change if the electric rate structure changes. We can’t predict the future, but we can show you a possible scenario.

To see what your bill would look like if the peak billing period shifted from 11am-6pm to 2pm-8pm, click “Recalculate!”

Total Annual Electric Bill Savings with Current Peak: $-
Total Annual Electric Bill Savings with Later Peak: $-