Utah has a top-five solar resource in the continental United States. Salt Lake City receives more annual sunlight than Miami. The high elevation, low humidity, and abundance of clear days make Utah one of the best places in the country to generate solar electricity. The problem is not the sun. It is the net metering policy.
Utah transitioned from full retail net metering to a time-of-use export credit structure that pays significantly less for electricity sent to the grid. This policy change fundamentally altered the solar value proposition. Under the old rules, solar was a straightforward good investment. Under the current rules, it is a nuanced decision that depends on your home’s daytime energy usage and whether you are willing to invest in a battery. Here is how to think about it.
What Solar Panels Cost in Utah
Utah solar costs $2.60 to $2.90 per watt installed, which is below the national average. The competitive installer market along the Wasatch Front keeps pricing low. Automated permitting through SolarAPP+ in many Utah cities reduces administrative costs.
| System Size | Installed Cost (Before Incentives) | After Federal Tax Credit | Solar + Battery (After Credit) |
| 5 kW | $13,000–$14,500 | $9,100–$10,200 | $14,700–$17,600 |
| 7 kW | $18,200–$20,300 | $12,700–$14,200 | $18,300–$21,600 |
| 10 kW | $26,000–$29,000 | $18,200–$20,300 | $23,800–$27,700 |
The federal tax credit covers 30 percent. Utah’s state tax credit expired at the end of 2017 and has not been renewed. The state offers a property tax exemption. Rocky Mountain Power does not offer a standalone solar rebate. Some municipal utilities, including those in St. George and Murray, offer limited local incentives.
The Net Metering Shift: The Single Most Important Variable
Under full retail net metering, a kilowatt-hour exported to the grid was worth the same as a kilowatt-hour consumed. Your solar system could be sized to offset 100 percent of annual usage, and summer excess would cancel winter deficits at a one-to-one value. That policy no longer applies to new installations.
Under the current structure, exported electricity is credited at a time-of-use export rate that is lower than the retail rate. During summer peak hours, exports are credited at approximately 5 to 7 cents per kilowatt-hour. During off-peak hours, exports are credited at 3 to 5 cents. Electricity consumed from the grid costs the full retail rate of 11 to 12 cents. The gap between the export credit and the retail rate is the value that was lost when full retail net metering ended.
Systems installed before the transition are grandfathered under the original full retail net metering rules through a defined period. If you are considering buying a home with existing solar, check the installation date. A grandfathered system is worth more than a new system of the same size because it operates under the more favorable legacy rates.
Self-Consumption Is Now the Name of the Game
In the post-net-metering environment, solar electricity used immediately in the home is worth 11 to 12 cents per kilowatt-hour. Solar electricity exported to the grid is worth 3 to 7 cents. The goal is no longer to maximize total generation. It is to maximize self-consumption of that generation.
A typical Utah home without battery storage self-consumes approximately 30 to 50 percent of solar generation. The rest is exported during midday when the sun is highest and the home’s consumption is lowest. A home with a stay-at-home parent, remote workers, or young children during the day self-consumes more. A home that is empty from 8 a.m. to 6 p.m. self-consumes less and exports most of its generation at the lower rate.
Behavioral changes increase self-consumption without spending money on equipment. Run the dishwasher, washing machine, and electric dryer during midday when solar is producing. Charge an electric vehicle during the day instead of overnight. Pre-cool the house with air conditioning in the late afternoon before peak electricity rates begin, using solar power rather than grid power. These changes shift consumption into solar production hours and increase the value of each kilowatt-hour your system generates.
The Battery Decision: Solar Alone vs. Solar Plus Storage
A battery increases self-consumption from 30 to 50 percent to 70 to 90 percent by storing midday surplus and discharging it during the evening when the home is occupied and grid electricity is expensive. The battery adds $8,000 to $12,000 to the upfront cost, with a net cost of $5,600 to $8,400 after the federal tax credit.
For a solar-only system under the current export rates, the annual savings are approximately $700 to $1,000 depending on self-consumption. The payback period is 13 to 18 years. For a solar-plus-battery system, annual savings increase to $1,100 to $1,400. The payback period is 13 to 16 years for the combined system, with the added benefit of backup power during outages.
The battery does not dramatically shorten the payback period. What it does is shift the system from one that exports the majority of its generation at a low rate to one that captures the full retail value of most of its generation. The battery also provides backup power, which has tangible value in Utah communities subject to Public Safety Power Shutoffs during wildfire season and occasional winter storm outages. This resilience value is not captured in a simple payback calculation but is real.
25-Year Financial Picture
Over 25 years, a Utah homeowner with a 7-kilowatt solar-only system can expect net savings of $5,000 to $12,000 after recovering the initial investment. A solar-plus-battery system can expect $10,000 to $18,000. The wider range reflects the uncertainty in self-consumption rates, future export credit rates, and battery lifespan. The inverter replacement at year 12 to 15 is factored in. Battery replacement at year 10 to 15 may be required and is the largest variable in the lifetime cost.
Utah’s solar resource is so strong that it partially overcomes the unfavorable policy environment. The same system in Indiana, which has a similar net metering phase-out but less sun, generates nearly 30 percent less electricity and may not reach breakeven within the panel warranty. Utah’s sun provides a margin of safety that weaker solar states lack.
When Solar Makes Sense in Utah
High daytime occupancy. Homes where someone is present during the day self-consume more solar and export less at the lower rate. Remote workers, families with young children, and retirees benefit disproportionately from solar under the current rates.
Electric vehicle charging during the day. An EV that charges during solar production hours consumes surplus generation that would otherwise be exported at the low rate. The combined solar-plus-EV investment is stronger than solar alone.
Air conditioning load in summer. Utah summers are hot, and air conditioning is the largest residential electricity load. Solar production peaks at the same time of day and season as air conditioning demand. This natural alignment increases self-consumption without behavioral changes or battery storage.
Ground-mount systems. A ground-mount array in a Utah yard can be oriented for maximum production, manually cleared of snow, and expanded more easily than a roof-mounted system. The added production from optimal orientation and tilt reduces the per-kilowatt-hour cost and improves the return.
When Solar Is Probably Not Worth It in Utah
Empty home during the day. If everyone leaves for work and school from 8 a.m. to 6 p.m., self-consumption is minimal. Without a battery, most generation is exported at the low credit rate.
Moving within 10 years. The payback period under the current export rates requires a longer time horizon than under the old net metering rules.
Heavy mountain or tree shade. Utah’s mountain topography creates shade patterns, particularly for homes on east-facing slopes in the Wasatch foothills. A shaded roof produces too little to justify the cost.
Old roof. Utah’s intense UV at high elevation degrades asphalt shingles faster than in most states. Replace before installing solar.
Frequently Asked Questions
How much better was solar under the old net metering rules?
Under full retail net metering, a 7-kilowatt system in Utah had a payback of 6 to 8 years and net savings of $18,000 to $25,000. Under the current export credit structure, the payback is 13 to 18 years for solar-only and net savings of $5,000 to $12,000. The policy change roughly doubled the payback period and halved the lifetime savings. Every kilowatt-hour you can self-consume rather than export recovers some of that lost value.
I am buying a home with existing solar. How do I know if it is grandfathered?
Ask the seller for the interconnection agreement with Rocky Mountain Power. The agreement states the rate structure and any grandfathering terms. If the system was installed before the net metering transition deadlines, it is likely grandfathered under the original full retail net metering rules through at least 2032. A grandfathered system is a meaningful financial asset that increases the value of the home beyond the value of the panels alone. The higher effective rate for exported electricity should be factored into your offer.
Does adding an electric vehicle improve the solar payback?
Yes, if you charge during the day. An EV that charges overnight from the grid does not improve solar payback. An EV that charges during solar production hours consumes surplus generation that would otherwise be exported at the low credit rate. Every kilowatt-hour of solar that goes into an EV instead of the grid is worth the full retail rate plus the avoided cost of gasoline. At Utah’s gasoline prices and electricity rates, charging an EV with self-consumed solar costs the equivalent of about $1.00 per gallon of gasoline. The combined solar-plus-EV investment is one of the strongest energy economics available to Utah homeowners.
