TEP rate increases and what they mean for solar
Tucson Electric Power rates run through the Arizona Corporation Commission, the same way APS rates do. We will keep the verified figures here as cases are decided. In the meantime, the logic is the same statewide: rising rates make owning your power the move that pays off.
We have not posted a TEP percentage yet because we will only publish a figure we can cite to the official filing. For the current case, check the Arizona Corporation Commission eDocket and TEP’s rates page directly.
TEP rate increase: 13%
pending ACC decision; requested for September 2026. Source: TEP 2026 rate case, Arizona Corporation Commission (Docket E-01933A-25-0103).View the filing.
What it looks like over 25 years
A rate increase does not happen once. It compounds. The line below shows the difference between staying on the TEP rate and locking your cost in with solar.
Illustration of the two cost paths over 25 years, not a quote. Your real numbers come from the free savings review.
| Year | Cumulative utility cost | Cumulative solar cost |
|---|---|---|
| 0 | $0 | $18,000 |
| 5 | $13,262 | $19,250 |
| 10 | $30,187 | $20,500 |
| 15 | $51,789 | $21,750 |
| 20 | $79,358 | $23,000 |
| 25 | $114,545 | $24,250 |
How solar caps your rate
Whatever a TEP rate case lands on, owning solar changes your exposure to it. The power your panels produce costs the same every year, so a rate increase only applies to what you still buy from TEP. Southern Arizona’s strong sunlight means a well-sized system can cover a large share of a home’s usage.
We serve homeowners across Arizona, Tucson and southern Arizona included. If you are a TEP customer, the first step is a quick conversation about your roof and your rate plan. Start with the savings calculator to see the shape of the numbers.
Rates are rising statewide. Run your numbers.
See what owning your power would do for your bill. Free, honest, and no pressure.