Data approachEIA rates · NREL sun hours · 2026 federal policy · methodology
In 2026, Utah homeowners who buy solar with cash or a loan get no federal tax credit, because the 25D residential credit ended on December 31, 2025. New Rocky Mountain Power customers are also on net billing rather than net metering, so exported solar earns roughly 4–5¢/kWh while power you use on-site offsets about 11¢/kWh. Solar can still make sense in Utah’s sunny climate, but payback is longer than older guides suggest and system sizing matters more than ever.
This guide explains the current rules, realistic costs, and a transparent payback model you can adapt to your own bill. We cite sources for each policy claim and label our own calculations as estimates.
⚖️ Policy & Net Billing
How Rocky Mountain Power Net Billing (Schedule 137) Works
Rocky Mountain Power (RMP) serves most of Utah, and new rooftop solar customers fall under Schedule 137, Net Billing Service. It applies to customers who file an interconnection agreement after October 30, 2020. Exported kilowatt-hours are valued at a set export credit rate that RMP updates every March 1, and exports are netted against your grid purchases instantaneously rather than monthly. According to Utah Clean Energy’s Utah Energy Hub, the current rates are 4.855¢/kWh for June–September and 4.030¢/kWh for October–May, compared with an average of about 10.2¢/kWh that RMP residential customers pay for grid power. Statewide, the U.S. Energy Information Administration (EIA) reported an average residential price of about 11¢/kWh in April 2026.
Older programs are closed to new customers. Schedule 135 net metering (retail-rate credits) is grandfathered through January 1, 2036 for systems interconnected before November 15, 2017, and Schedule 136 (about 9.2¢/kWh for residential customers) runs through January 1, 2033 for systems interconnected between November 15, 2017 and October 30, 2020. Because the export rate is recalculated every year, always verify the current figure on RMP’s Schedule 137 page before signing.
Data visualization
One kWh used on-site is worth more than twice one exported. Retail is roughly 11.0 cents/kWh versus 4.855 cents (Jun-Sep) and 4.030 cents (Oct-May) for exports under Rocky Mountain Power Schedule 137. Source: Utah Clean Energy Utah Energy Hub; EIA Electric Power Monthly, Apr 2026.
Chart summary: A kilowatt-hour of solar that you use at home is worth about two to three times more than one you export. That gap is why Utah installers now emphasize right-sizing and batteries: the more of your solar output you consume yourself, the faster the system pays back.
Practically, this changes sizing advice. Older guides recommended covering 100–105% of annual usage. Under net billing, a system sized to your annual total can export a lot of low-value power at midday, so many households do better with a system matched to daytime load or paired with storage. Some municipal utilities have different programs (reports indicate St. George and Murray offer retail-rate credits), so confirm your utility using the Utah Office of Consumer Services’ “Find my utility” tool.
🏛️ Incentives
Utah Solar Incentives in 2026: What Actually Exists
Incentives have changed sharply, and this is where many older articles are now wrong.
Federal credit. The One Big Beautiful Bill Act, signed July 4, 2025, ended the homeowner-claimed 30% residential clean energy credit (25D) for expenditures after December 31, 2025. IRS guidance indicates that installations completed after that date cannot claim it. Homeowners who finished installation in 2025 keep the credit and can carry forward unused amounts. Third-party-owned systems (leases and PPAs) can still be claimed by the owner company under the commercial 48E credit, which requires projects to begin construction by July 4, 2026 or be placed in service by December 31, 2027, and it carries foreign-sourcing rules. Any savings you see from a lease depend on the contract terms, including escalators and buyout clauses.
State tax credit. Utah’s residential renewable energy tax credit has expired, and trackers place its end at or around the 2023 tax year. Confirm with the Utah State Tax Commission or a tax professional if you think you may qualify for anything.
Utility incentives. The Rocky Mountain Power Wattsmart program we could verify for residential solar customers is the battery program, covered below. We did not find a current cash rebate from RMP for solar panels themselves, so be cautious with any quote that includes one.
What this means: if a salesperson’s savings estimate subtracts 30% from the system price, ask them to remove it and re-run the numbers. Use our solar tax credit calculator to see how the credit applies to systems placed in service in earlier years, or to compare lease offers.
📈 Payback Period
Utah Solar Payback Period: What to Expect in 2026
Published installed prices for Utah vary by source. EnergySage’s marketplace data showed an average of about $2.50 per watt in August 2026 (about $32,000 for a 12.85 kW average-sized system), while city-level estimates from other sources run closer to $3.30–$3.40 per watt. We use $2.80/W as a mid-range planning figure, so an 8 kW system costs about $22,400 before incentives, and show the effect of lower pricing below.
Model assumptions (our estimate, not a guarantee):
8 kW system producing about 12,000 kWh per year (roughly 1,500 kWh per kW; Salt Lake City sees about 5.3 peak sun hours per day in NREL PVWatts data; check your own address)
Retail value of on-site use: 11¢/kWh
Export value: about 4.3¢/kWh (weighted average of the summer and winter export rates)
No federal or state credit, flat electricity prices, no panel degradation, no financing cost
Self-consumption (share of solar used on-site)
Year-1 savings
Simple payback at $22,400
40% (no battery, away during the day)
≈ $840
≈ 26.7 years
60% (partly home during the day)
≈ $1,000
≈ 22.4 years
80% (daytime-heavy use or battery)
≈ $1,160
≈ 19.3 years
At a lower installed price of $20,000 ($2.50/W), the 60% case improves to about 20.0 years.
Data visualization
An 8 kW Utah system breaks even in about 19 to 27 years with no federal credit. Cumulative cash flow from a $22,400 purchase at 40, 60 and 80 percent self-consumption; model assumes 12,000 kWh per year, 11 cents retail, 4.3 cents export and 0 percent annual rate escalation. Source: editorial model using EIA and Utah Energy Hub rates.
Chart summary: Under 2026 rules, a cash purchase in Rocky Mountain Power territory reaches break-even in roughly 19 to 27 years in our model, versus a typical 25-year panel warranty. The 40% line stays slightly negative at year 25, while the 80% line crosses zero around year 19 and ends about $6,600 ahead. Self-consumption is the biggest lever you control, followed by installed price. Rising electricity prices would shorten payback; EIA-based data show Utah residential rates rising from about 9.9¢ in 2020 to about 11¢ in April 2026, a modest pace.
Solar tends to pencil out best for households with high daytime usage, large cooling loads, EV charging, a lower-than-average quote, or a battery. If your bill is already low (EIA-based data suggest Utah households have among the lowest bills in the U.S.), a long payback is a legitimate reason to wait or to shop for a smaller system. To test your own numbers, use the solar payback calculator or the solar savings calculator, and see how other states compare in our guide to Solar Panel Payback Period by State.
🔋 Storage & Usage
Battery Storage and the Wattsmart Battery Program
Under net billing, a battery shifts midday solar into the evening instead of exporting it at about 4–5¢/kWh, which can raise self-consumption toward the 80% case above. It also provides backup power during outages.
Rocky Mountain Power’s Wattsmart Battery program is Utah’s main battery incentive. Participants allow RMP to use part of the battery’s capacity to support the grid. According to program information published by a participating battery maker, enrollment pays up to $400 per kW of battery capacity, capped at $2,000 per household for applications submitted on or after May 1, 2025, plus an annual bill credit of $15 per kW starting in the second year. Solar is required, and only approved battery models qualify. Because terms change, confirm current eligibility with RMP before buying.
Battery pricing runs roughly $10,000 for a typical home unit according to Utah reporting, and the 30% federal credit no longer applies to purchases made after 2025. Treat a battery as a resilience and self-consumption purchase, and ask your installer to model the payback with and without it. Use the battery storage calculator to compare scenarios.
📋 Key Insights
Choosing a Utah Solar Installer and Avoiding Common Pitfalls
Quote spreads for the same system size can be thousands of dollars, so request at least three bids and compare price per watt, panel and inverter brands, workmanship and product warranties, and monitoring.
Ask for a savings model built on Schedule 137. Request a year-by-year production and bill-savings estimate that uses current export credit rates, not retail-rate credits.
Reject quotes that include the 30% federal credit for a purchased system installed in 2026. If a quote cites “net metering,” ask which schedule it assumes.
Right-size the system. Ask what share of output you will use on-site and how the estimate changes with a smaller array or a battery.
Read lease and PPA contracts carefully. Check the escalator, term, transfer terms and what happens if you sell your home.
Verify credentials and references. Look for NABCEP-certified staff where possible, confirm licensing and insurance, and check recent reviews. Utah Clean Energy publishes guidance on selecting a contractor.
Confirm your utility. Not every Utah home is served by Rocky Mountain Power, and municipal and co-op utilities set their own solar rules.
Permit and interconnection timelines vary by city and utility, so ask your installer for the current timeline in your area rather than relying on generic estimates.
Methodology & Sources
Policy statements were checked against the sources below in October 2026. Payback figures are our own calculations from the stated assumptions and will differ from your quote. Policies and rates can change; verify before signing.
No, not for systems you buy with cash or a loan. The 30% residential clean energy credit (Section 25D) ended for expenditures after December 31, 2025 under the One Big Beautiful Bill Act. Homeowners who finished installation by that date keep the credit and can carry unused amounts forward. Leased or PPA systems may still pass along the business 48E credit, but those savings depend on the contract. Confirm with a tax professional.
Mostly no. Rocky Mountain Power closed net metering (Schedule 135) and its transition program (Schedule 136) to new customers. Customers who file an interconnection agreement after October 30, 2020 are on Schedule 137 net billing, where exported energy earns about 4.0–4.9¢/kWh and is netted against usage instantaneously. Some municipal utilities have different rules, so check your utility before you sign.
Published 2026 estimates run from roughly $2.50 to $3.40 per watt installed, so an 8 kW system typically costs about $20,000 to $27,200 before incentives. EnergySage marketplace data showed about $2.50/W in Utah in August 2026, while city-level estimates from other sources are higher. Quotes vary widely by equipment, roof complexity and installer, so collect at least three.
Under the assumptions in this guide (8 kW, 12,000 kWh/year, $22,400 cost, no federal credit), simple payback is about 19 years if you use 80% of your solar on-site, 22 years at 60%, and 27 years at 40%. Payback improves with a lower installed price, daytime-heavy usage or a battery. Your actual result depends on your usage profile and quote.
It can be, because under net billing exported power earns far less than power you use yourself. Rocky Mountain Power's Wattsmart Battery program pays an upfront incentive of $400 per kW of battery capacity, capped at $2,000 per household for applications since May 1, 2025, plus an annual credit of $15 per kW from year two. Solar is required, and the 30% federal credit no longer applies to purchases. Verify current terms.
Utah solar by electric bill
See system size and payback for common monthly bills in Utah.
13.16¢/kWh — Utah average residential price. Source: EIA Electric Power Monthly, Table 5.6.B (year-to-date through July 2026), residential average retail price (July 2026) (EIA)
Solar production
5.8 peak sun hours/day × 0.82 system derate. Approximate state-average daily solar resource (peak sun hours) based on NREL solar resource data (NSRDB); not location-specific — use NREL PVWatts for an address-level estimate. (NREL PVWatts)
Installed price
$3.00 per watt before incentives. Blended 2026 US residential installed price used by this site; EnergySage marketplace reported about $2.60/W (mid-2026); full-market medians are higher.
Federal tax credit
$0 for homeowner-owned systems installed in 2026 — the 30% §25D credit ended Dec 31, 2025 (IRS)
Net metering
Net billing / reduced export credit — solar assumed to offset 70% of the bill. Rocky Mountain Power's Utah export credit rate pays a fraction of retail for exports.
Estimates only — not tax, legal or financial advice. Get at least three installer quotes and confirm incentives with your utility and a tax professional.