What rate cases do to a bill
Colorado’s regulated utilities change base rates through cases before the Public Utilities Commission. Xcel Energy’s most recent Colorado electric case was reported to add roughly 4.77% — about $5 a month — to a typical residential bill, effective in late August 2026. Check the PUC’s final order for the exact figure on your rate schedule.
Single increases like that are modest. What matters for solar is the pattern over decades: fuel costs, grid hardening, wildfire mitigation and transmission all flow into rates over time. Every kilowatt-hour your panels produce is one you don’t buy at whatever the future price turns out to be.
Fixed payment versus moving bill
If you finance a system with a fixed-rate loan, your payment is set on day one. RENU loans through Westerra Credit Union run about 7.74–8.99% APR for up to 20 years; Concert Finance offers 8.99% for up to 25. Once the loan is paid off, the power your panels make costs you essentially nothing beyond occasional maintenance.
The trade is that you’re committing to that payment even if utility rates stay flat. If rates rise faster than you expected, you win bigger; if they barely move, your savings are thinner. We model a few rate-escalation assumptions side by side so you can see how sensitive your result is.
Read the lease escalator carefully
Leases and PPAs are priced below the utility — our offers typically run 20–30% under retail — but most carry an annual escalator between 0% and 3%. A 3% escalator raises a $150 payment to about $270 over 20 years. If utility rates rise slower than that, the gap you started with shrinks.
A 0% or 1% escalator is closer to a true lock. A higher escalator can still make sense if the starting discount is deep, but look at year 15 and year 20, not just year one.
What solar doesn’t lock
Your utility’s fixed monthly customer charge, any future solar-specific fees, and time-of-use differentials all stay outside your control. Colorado Springs Utilities’ September 2026 net-metering decision is a live example: new solar customers there face a daily fee or a demand charge that didn’t exist before. Rules can change, and a good proposal says so.
FAQ
Questions we hear
How much have Xcel’s Colorado rates gone up?
The latest electric rate case was reported at about a 4.77% residential increase, around $5 a month for a typical home, effective late August 2026. Rate history varies by year and by rate schedule; the PUC’s decisions are the authoritative record.
If I lease, am I protected from rate increases?
Partly. Your lease payment is contractually set, including any escalator. The power you still buy from the utility — and your fixed customer charge — continue to track utility rates. A lease with a 0–1% escalator protects you more than one with 3%.
What happens if utility rates actually go down?
Then your savings shrink, and a fixed loan or escalating lease can look worse in hindsight. It’s uncommon for Colorado residential rates to fall over long stretches, but it’s possible, and small decreases do happen — Colorado Springs Utilities approved one for October 2026. That’s the honest risk on the other side of the bet.
Is it better to pay cash to lock in rates?
Cash avoids interest and gives the cleanest lock, but it ties up capital. With loan rates near 8–9%, cash usually produces the best lifetime return if you have it and plan to stay; a loan spreads the cost with the payment fixed from day one.