Where Does Your Electricity Actually Come From? How to Read the Power Content Label in Your Mailbox

Where Does Your Electricity Actually Come From?
How to Read the Power Content Label in Your Mailbox

Once a year, a small chart arrives with your bill. Most of us toss it. It actually tells you a lot. The problem: "clean" and "renewable" don't always mean the same thing. Your utility or community choice provider is required to publish a Power Content Label. It breaks down the sources behind the electricity it sold, based on the prior year's generation from resources it owns or has contracted for. The California Energy Commission reviews and approves it. The trouble is that the categories can sound alike. Renewable, carbon-free, large hydro and "unspecified" are not the same thing.

Four lines worth knowing

-Renewable: solar, wind, geothermal, eligible hydro, biomass and biogas.

-Large hydroelectric and nuclear: carbon-free, but not counted as renewable.

-Unspecified power: electricity from the general grid mix that can't be traced to one plant or fuel.

-Emissions intensity: some labels also show how carbon-heavy the mix is.

What real labels look like

Ava Community Energy's 2025 label gives a good example. Its default Bright Choice product was 55% renewable, 36% large hydro, 9% nuclear and 1% unspecified. Its Renewable 100 product was 100% renewable. Clean Power Alliance's 100% Green Power product, for 2025, lists solar as 100% of its content. The same plan name can mean very different mixes from one provider to the next, so read your own label rather than assuming.

What's changing

Newer reporting rules add line losses, the power lost in transmission, starting with the 2026 submission that covers 2025. Hourly load accounting follows for the 2028 submission, which covers 2027. In plain terms, labels are getting more precise about when and where power is generated.

What the label can't tell you

The label tells you the mix. It doesn't tell you what you'll pay, and it doesn't keep your lights on during an outage. Your bill still includes generation, delivery and other charges. The most direct way to change what you buy from the grid is to produce and store some of your own power.

How third-party ownership (TPO) works
In a TPO program, a company installs, owns and maintains the solar and battery system at your home. You pay for the power it produces without buying, leasing, or financing equipment. Many programs are designed to come in below utility rates, with savings of up to 40% depending on your home and program.

Here is what a TPO solar and battery program can offer:

-A known source for part of your power, generated on your own roof

-Stored solar for evening hours, when rates are typically highest

-Backup power during outages, with maintenance handled by the provider

-Availability depends on your home and utility, so see what fits your situation.

To find out if your home qualifies for a TPO solar and battery program, visit myhomesolution.org

Clean Power Alliance, 2025 Power Content Label data (Aug. 2026): https://files.cleanpoweralliance.org/uploads/2026/08/2025-Historical-PCL-HPCL-CPA_5.15.2026.pdf

Ava Community Energy, Renewable and Clean Energy Compliance (Sep. 2, 2026): https://avaenergy.org/wp-content/uploads/2026/08/8.-9-2-26-Renewable-and-Clean-Energy-Compliance-ExCom_Final.pdf