Solar in Oklahoma costs about $2.64 per watt, the 6th lowest price of 51, so the typical 7.42 kW system runs about $19,589 before incentives. To get net metering, your system can be at most 125% of your peak load, so your past usage, not your roof, sets the ceiling. Your last twelve months of bills show how much energy you need; ask which peak-load figure the utility uses for the 125% test.
Size a system against your real load
In Oklahoma your usage history sets how big you may build. Enter your ZIP code and we will size a system against your actual load before anyone quotes you.
EcoGen is a referral service. Your request may be shared with installers, marketplaces or lead exchanges, and more than one provider may contact you. Review the contact consent before submitting.
- Free, no-obligation quotesRequest quotes from local installers in minutes. You decide if you go ahead.
- Compare provider credentialsAsk for licensing, insurance and warranty details before signing.
- Your details come lastFour quick questions about your home first. Name, email and phone only at the end.
Your last twelve bills are the blueprint: Oklahoma’s 125% size ceiling
Under 17 O.S. 156 and the Corporation Commission’s rules, a net-metered system may not be designed to make more than 125% of your expected peak load. The overall cap is 300 kW. Your installer has to justify the size against your usage history, so this is a design limit, not a formality.
- About to add load? Add it first. An electric vehicle, a heat pump or a workshop changes what you may build. Installing solar the year before you buy the car can lock you into a smaller array.
- Usage dropped lately? Expect a smaller system. A quiet year, a smaller household or an efficiency upgrade all lower the ceiling.
- Bring all twelve months. Oklahoma summers dominate the total. A design based on spring bills will undersize the array against a rule measured on the whole year.
Cheap hardware, hard limitLow prices against a fixed size limit is an unusual mix. It rewards households that already use a lot of power.
$2.64 a watt, 5 kW to 12 kW: what each Oklahoma size costs and makes
Oklahoma homes use a lot of power, 1,079 kWh a month against a national picture nearer 900, and get good sun: 1,554 kWh per kW a year. The benchmark across sizes, gross before incentives, with what each size makes in a month. Remember that the 125% limit sizes against your existing usage. For every other state, see our national cost of solar overview.
Gross cost at $2.64 per watt (EcoGen Solar Cost Index, September 2026 Edition), before incentives. Monthly output at 1,554 kWh per kW a year. Real quotes vary by roof, equipment and installer.
Full retail up to your usage, about 4¢ past it: the Oklahoma meter
Within a billing period your generation offsets your use one-to-one at full retail energy rates. Oklahoma has no closing deadline, no grandfathering window and no successor proceeding pending, so the terms you connect under look stable.
Power that offsets your use
Valued at the full retail energy rate within the same billing period. Confidence: high. It is in statute and Commission rule.
Net excess beyond your use
The utility’s avoided energy cost, a wholesale-level figure, applied to your next billing cycle. OG&E posted 3.36¢ off-peak for September 30, 2026, and PSO’s table dated September 23, 2026 credits August power, on September bills, at 3.65¢ off-peak and 3.93¢ on-peak.
Each utility sets the surplus rateOG&E’s NEBO tariff credits surplus at a 30-day average of wholesale prices that it posts daily. PSO posts a monthly figure. Both sat near 4¢/kWh off-peak in 2026, with OG&E’s summer on-peak price near 10¢. Ask Oklahoma Gas & Electric or Public Service Company of Oklahoma in writing, and treat surplus as worth far less than the 13.70¢ you pay.
Build to cover your use, not to sell powerIt is the same answer the 125% rule points to. Oklahoma pays you well for power you use and vaguely for power you export.
7.42 kW at PSO: how the typical Oklahoma system reaches 12.1 years or more
Used as it is made, the power offsets your utility’s retail rate. Our per-utility figure for PSO values all output at PSO’s own price, before incentives, with no upkeep or price rises. Rates have climbed 3.69% a year over five years, which works in your favor.
Typical 7.42 kW system at $2.64 per watt
The $0 applies to systems you own whose installation is completed after December 31, 2025, under Public Law 119-21. The whole case rests on install price and self-use, and Oklahoma is unusually good for both. OG&E, the largest utility, has no figure in our per-utility file yet, and Oklahoma prints no state figure.
13.70¢ is not your rateThe statewide average is ranking context, not a billed rate. OG&E and PSO each file their own residential rates, so rerun the year-one value and the payback with the rate on your own bill.
Four Oklahoma buyers who should slow down before signing
Oklahoma’s advantages are cheap hardware and full-retail self-use. Each of these puts one of them at risk:
- Your quote assumes a specific export rate. The figure to assume is your utility’s posted avoided energy cost, near 4¢/kWh off-peak in 2026. Ask what the model uses and where it came from.
- You plan a big load change. The 125% ceiling is set from history, so the order of events matters more here than in most states.
- You buy power from a co-op or a city utility. The Corporation Commission rules bind OG&E and PSO. Oklahoma Electric Cooperative, the City of Edmond and the other non-jurisdictional utilities set their own terms.
- Your quote is much above $2.64 per watt. Sixth-lowest pricing in the country is the state’s whole advantage, and the easiest thing to give away.
Get bids that respect the 125% rule
Your usage history sets the ceiling and your self-use sets the value. Enter your ZIP code and we will design against both.
- Quotes built for your roofEach quote is designed around your home and your bills.
- Check the providerVerify licensing, insurance and warranty terms before signing.
- No cost, no pressureComparing quotes is free, and you are never obliged to sign.
Check Oklahoma’s $2.64 against the country
Frequently asked questions
How much do solar panels cost in Oklahoma in 2026?
About $2.64 per watt installed, 6th lowest of 51 in the EcoGen Solar Cost Index (September 2026 Edition). The typical system is 7.42 kW, the median size Oklahoma homeowners installed in 2025, roughly $19,589 before incentives, producing around 11,533 kWh a year.
Does Oklahoma have net metering?
Yes, and it is better than most. Under 17 O.S. 156 and Corporation Commission rules, generation offsets consumption one-to-one at full retail energy rates within the billing period for customers of OG&E and PSO. There is no closing deadline and no successor proceeding pending. Cooperatives and municipal utilities are outside those rules.
How big a solar system can I install in Oklahoma?
A net-metered system may not exceed 125% of your peak load, with an overall cap of 300 kW. In practice your twelve months of billing history is the specification, so if you are about to add an electric vehicle, heat pump or workshop, adding that load before you design the array matters.
What does Oklahoma pay for excess solar power?
The utility avoided energy cost, which is a wholesale-level figure well below the 13.70¢ average retail rate, applied to your next billing cycle. OG&E posts the figure daily and PSO monthly, near 4¢/kWh off-peak in 2026, so any specific number you are quoted should be traced back to your own utility’s posted price rather than taken from a website.
What is the solar payback period in Oklahoma?
At least 12.1 years at PSO in our per-utility figures, simple payback before incentives, helped by cheap installation and strong sun. OG&E, the largest utility, has no figure yet. Because surplus is paid at a wholesale-level rate near 4¢/kWh, self-consumption is where the value sits, which is also what the 125% sizing rule pushes you toward.
How we calculate these costs
Cost figures use Oklahoma’s entry in the EcoGen Solar Cost Index (September 2026 Edition), $2.64 per watt, 6th lowest of 51. The 7.42 kW typical size is Berkeley Lab’s 2025 median for Oklahoma single-family installs (121 systems). Payback comes from our per-utility file of October 19, 2026: the typical cost divided by a year of PSO savings, 11,568 kWh (1,559 kWh per kW) valued at 13.963¢, PSO’s EIA 12-month average (August 2025 to July 2026) less its $17.30 monthly charges, with no federal residential credit for owner-purchased systems and no upkeep or price rises. OG&E has no figure in the file because no filed number for its leftover credit was found; its posted price sat near 4¢/kWh off-peak in 2026.
Sources (5)
- Oklahoma Corporation Commission (OCC), Net Metering Rules, 17 O.S. 156 and OAC 165:40-9 (accessed June 10, 2026): oklahoma.gov
- U.S. EIA, Electric Power Monthly, residential price by state, 12-month average August 2025 to July 2026: eia.gov
- U.S. EIA, Form EIA-861: Annual Electric Power Industry Report, 2024 (accessed June 10, 2026): eia.gov
- U.S. Census Bureau, American Community Survey, 2024 (accessed June 11, 2026): census.gov
- IRS, One, Big, Beautiful Bill Provisions: Public Law 119-21 and the end of the Section 25D credit (accessed August 15, 2026): irs.gov
