Is plug-in solar legal in Colorado?

What the Colorado law says

• Size. Up to 1,920 W of AC output.
• Safety listing. UL Solutions standards for devices over 391 W.
• Telling the utility. We have not confirmed a notice rule.
• Timing. General effective date. The Public Utilities Commission has until 31 Dec 2026 to write meter collar interconnection rules, and news reports say full effect starts in 2027.

Chapter 127. Renters can install a kit after telling their landlord. Utilities cannot prohibit the devices and must allow meter collars.

What has started and what has not

The bill is signed, which means the direction is settled. What is still open is timing and detail: General effective date. The Public Utilities Commission has until 31 Dec 2026 to write meter collar interconnection rules, and news reports say full effect starts in 2027.. Until then there is no settled legal route here, so check this page again before you buy a kit. We will change the status once it is running.

Renters, condos and apartments

A renter can install a kit after telling the landlord.

What it might save you

We have not put a Colorado savings figure on this page yet, because we have not finished checking the state electricity price and a solar output figure for Denver. Our calculator is the place to try your own numbers once the US version is up. The method is on the methodology page.

Nearby states we have covered

Utah. See the full state tracker to compare rules.

How Colorado compares

Other states with a signed law that has not fully started: Virginia, Connecticut and New Hampshire. For a different picture, see Maine. While you wait for the start date, it helps to know what you would be buying. How plug-in solar works explains the parts, and it is worth reading before you shop.