What Colorado’s Law Allows

Colorado HB26-1007, signed in May 2026, establishes that any resident — renter or homeowner — may install a plug-in solar system of up to 1,920 watts on their property without:

• Utility interconnection approval or notification
• Building permits or inspections
• Landlord permission
• HOA prohibition (HOAs explicitly cannot prohibit plug-in solar)

The 1,920W ceiling — equivalent to roughly 4–5 standard panels — is 60% higher than the 1,200W standard in Utah, Maryland, and other states. At that scale, a Colorado household could offset a significant portion of their average monthly electricity use.

Law Details

Bill	HB26-1007
Signed	May 2026
Maximum system size	1,920 watts (highest in the US)
Safety certification required	UL 3700 (target standard)
HOA restrictions	Prohibited — HOAs cannot ban plug-in solar
Status	In effect

A note on that certification line: UL 3700 is the safety standard written specifically for plug-in solar, but it only launched in early 2026 and no products have completed certification under it yet. In practice, kits meeting the established UL 1741 standard for grid-connected inverters — like the ones on our recommended kits page — are what’s actually available and used to meet this requirement today.

Colorado Savings Estimates

Colorado’s average electricity rate is around $0.14–0.16/kWh. At that rate:

System size	Monthly savings	Payback
1 panel (400W)	~$8/month	~6 years
2 panels (800W)	~$16/month	~5.5 years
4–5 panels (1,920W, max)	~$35–40/month	~4–5 years

Colorado also has excellent solar resources — Denver averages over 300 sunny days per year, giving plug-in solar systems here some of the highest real-world output in the country.

See all US state plug-in solar laws at the Solarly state law tracker. Last updated: June 2026.