For homeowners, businesses and installers · Checked November 5, 2026
Colorado solar rules calendar
The next major dates are December 31, 2026 for photovoltaic installer registration and meter collar rules, and January 1, 2027 for plug-in solar rules. Every date below links to its source.
Coming up
| Date | What happens | Who it affects | Source |
|---|---|---|---|
| Nov. 9, 2026 | PUC public comment hearing on meter collar adapter rules, docket 26R-0356E, 11:30 a.m. on Zoom | Homeowners, installers, utilities | PUC |
| Dec. 15, 2026 | Utilities with more than 500,000 customers file working group recommendations with the PUC under HB26-1225 | Utilities, installers | Chapter 293 |
| Dec. 31, 2026 | Registration deadline for qualifying photovoltaic installers | Installers | SB25-165 |
| Dec. 31, 2026 | PUC rules and municipal utility standards on meter collar adapters are due | Homeowners, installers, utilities | HB26-1007 |
| Jan. 1, 2027 | Plug-in solar devices over 391 watts must be UL labeled and listed to be sold, leased or rented. Limits on unreasonable bans also begin | Homeowners, renters, sellers | HB26-1007 |
| About Mar. 1, 2027 | End of the 60-day grace period for photovoltaic installer registration, by our count. Confirm the exact day with the Board | Installers | SB25-165 |
| Apr. 1, 2027 | Proposed start date for new Colorado Springs Utilities net metering options, from its July 2026 rate filing. Final date unconfirmed | Colorado Springs customers | CSU filing |
| Dec. 31, 2027 | To qualify for the federal Section 48E credit, solar that began construction after July 4, 2026 must be placed in service by this date. Storage is excepted | Businesses, system owners | 26 USC 48E |
| Apr. 1, 2032 | Proposed mandatory transition date for current Colorado Springs net metering customers, with earlier transition allowed. Final date unconfirmed | Colorado Springs customers | CSU filing |
Recent changes
| Date | What happens | Who it affects | Source |
|---|---|---|---|
| Sept. 22, 2026 | Colorado Springs City Council approved net metering changes, as reported locally. We haven't confirmed final tariff sheets | Colorado Springs customers | The Gazette |
| About Aug. 12, 2026 | HB26-1007 took general effect, assuming the session ended as the act anticipated | Homeowners, renters | HB26-1007 |
| July 4, 2026 | Begin-construction date for federal Section 48E solar | Businesses, system owners | 26 USC 48E |
| July 1, 2026 | Colorado's solar sales law began applying to new residential agreements | Homeowners, solar sellers | SB25-299 |
| June 30, 2026 | Section 179D ended for property whose construction begins after this date | Businesses | IRS |
| June 6, 2026 | A federal court vacated IRS Notice 2025-42 on beginning of construction. No appeal had been filed as of September 4, 2026 | Businesses, system owners | Clifford Chance |
| Dec. 31, 2025 | Federal residential clean energy credit ended for property placed in service after this date | Homeowners | IRS |
| Nov. 1, 2025 | New Xcel Energy residential time-of-use periods began. Time-of-use is the default rate, with opt-out, and on-peak is 5 to 9 p.m. on non-holiday weekdays | Xcel customers | PUC |
This calendar explains published dates and isn't legal or tax advice. Dates can change, so confirm them with the source.