Oklahoma is an awkward solar case in 2026: world-class sun resource paired with some of the LOWEST US retail electricity rates and a monthly excess-credit structure that pays only avoided cost. The mechanism is simple and the same on both major utilities — the limiting factor is that low retail rates limit per-kWh savings, and monthly excess earns very little.
The headline:
- Mechanism (17 O.S. §156, OAC 165:40:9): monthly production nets against consumption at FULL RETAIL up to your usage; any monthly EXCESS is purchased at AVOIDED ENERGY COST (about $0.02-0.08/kWh, modeled at about $0.04). Dollar-based credits roll forward indefinitely.
- Both IOUs follow the same OCC framework — OG&E (central / western OK, retail about $0.108/kWh) and PSO (eastern OK, retail about $0.138/kWh). They differ in retail rate, NOT in mechanism.
- Co-ops and municipals NOT required to offer net metering; terms vary if you're not on an IOU.
- System cap: 300 kW DG / 125% of peak load.
- Federal §25D = $0 for systems installed after December 31, 2025 (OBBBA P.L. 119-21, signed July 4, 2025).
- NO Oklahoma state income tax credit.
- Property tax EXEMPT, PERMANENT — 100% of added home value exempt indefinitely.
- Sales tax NOT EXEMPT — OK 4.5% state + local (combined typically about 8-9%); verify your local rate.
- REC market is VOLUNTARY (NARR) — small optional upside, not a guaranteed payment. No SREC mandate.
- No confirmed utility rebate for 2026 — verify with OG&E / PSO.
- NO statewide battery rebate.
- About $2.85/W install pricing (NREL benchmark).
- Typical solar-only payback 15-20 years with federal $0.
Sources citing about 10-13 year payback assume the now-dead 30% federal credit. Oklahoma's low retail rates limit per-kWh savings even though the sun resource is excellent. Self-consumption and batteries add the most value because monthly excess earns very little.
The case for Oklahoma solar: permanent property tax exemption + retail offset on the self-consumed portion + world-class sun = real savings, just modest per kWh given the low retail. The drags: federal $0, no state credit, sales-not-exempt, monthly excess at avoided cost.
What changed federally — and what's still on Oklahoma quotes that shouldn't be
The federal Residential Clean Energy Credit (§25D) — the 30% homeowner credit — was repealed for systems installed after December 31, 2025. For 2026 Oklahoma buyers, the federal credit on a purchased system is $0. The same applies to home batteries purchased outright. The §48E commercial credit (30%) still exists, but only for leased or third-party-owned systems where construction begins before July 4, 2026 — and the lessor claims it, not you. Full federal context here.
The repeal came through the One Big Beautiful Bill Act (P.L. 119-21), signed July 4, 2025. Oklahoma-focused solar sites are slow on this — any 2026 quote still showing "30% federal through 2032" is using the dead pre-OBBBA schedule. If a 2026 OK quote includes "30% federal solar tax credit" on a cash purchase, ask the contractor to redo the math with $0 federal and verify with IRS.
VERIFIED 2026-06 · IRS §25D repeal under OBBBA P.L. 119-21Net metering — monthly retail offset + monthly excess at avoided cost
Oklahoma's net metering is set by 17 O.S. §156 and Oklahoma Corporation Commission rules (OAC 165:40:9). The structure:
- Within the month: production nets against consumption at full retail — every kWh you produce that offsets a kWh you use is worth retail (about $0.108/kWh on OG&E, about $0.138/kWh on PSO).
- Monthly EXCESS (any production above your consumption in the same month): purchased by the utility at AVOIDED ENERGY COST — about $0.02-0.08/kWh depending on utility and season. Modeled here at about $0.04/kWh as a central representative figure.
- Dollar-based credits roll forward indefinitely — no annual zero-out, no expiration. (Unlike states with annual cash-out at avoided cost, OK credits accumulate.)
Both IOUs follow the same OCC framework — there's no utility-selector decision to make on mechanism. OG&E and PSO differ only in retail rate:
- OG&E (Oklahoma Gas & Electric): serves Oklahoma City metro, central and western Oklahoma. Retail about $0.108/kWh.
- PSO (Public Service Company of Oklahoma): AEP subsidiary; serves Tulsa metro and eastern Oklahoma. Retail about $0.138/kWh.
Self-consumption value is higher per kWh on PSO than on OG&E (higher retail offset). Export-side math is the same on both (avoided cost).
Co-ops and municipal utilities are NOT required to offer net metering. Some do, on their own terms; some don't. If you're not on OG&E or PSO, verify your specific utility's tariff in writing before signing.
System cap: 300 kW DG / 125% of peak load. Residential systems are far below this in practice.
Right-sizing matters because monthly excess pays only avoided cost (well below retail). Match annual production tightly to consumption to keep most exports within the monthly retail-offset case rather than spilling to avoided cost.
VERIFIED 2026-06 · OCC / 17 O.S. §156 / OAC 165:40:9State income tax credit — does NOT exist
Oklahoma has NO state solar income tax credit for residential. The state-level financial picture in 2026 is the net metering framework (retail offset + monthly avoided-cost excess) and the permanent property tax exemption — and that's it.
If a contractor includes an "Oklahoma state solar credit" line in your quote, ask for the statute citation; there isn't one.
Property tax — EXEMPT, PERMANENT
Oklahoma exempts 100% of the added home value from residential solar from property tax. The exemption is PERMANENT — not year-limited, no expiration. Solar adds zero to your annual property tax assessment indefinitely.
This is a real structural plus, especially relative to states that exempt only for a fixed number of years and then re-assess. Over a 25-year horizon the value of the indefinite exemption accrues fully.
Sales tax — NOT exempt
Oklahoma does not exempt residential solar from sales tax. Oklahoma state sales tax is 4.5%, plus local rates (combined typically about 8-9% depending on city / county).
There is no solar-specific exemption. Verify your local combined rate before signing — actual added cost varies materially by jurisdiction within OK.
VERIFIED 2026-06 · Oklahoma Tax Commission; OCCREC market — voluntary, small optional upside
Oklahoma has a VOLUNTARY REC market — system owners can register and sell their RECs through trackers like the North American Renewables Registry (NARR). This is a minor optional revenue stream, not a guaranteed payment.
Important context: Oklahoma has NO SREC mandate. The state's old 15%-by-2015 renewable energy goal was voluntary — it was never an enforceable RPS, and the goal has lapsed. There is no compliance-driven SREC market like states with mandatory RPS targets have.
Practical implication: REC pricing in Oklahoma is thin and unstable. Don't budget for guaranteed REC revenue. If you choose to track and sell your RECs, treat any income as a small bonus on top of your modeled payback — not a load-bearing piece of the financial case.
Utility rebate — not confirmed for 2026
Some sources reference past OG&E or PSO upfront rebate programs for residential solar. Recent verification does not confirm these as currently live for 2026.
Do NOT bake a rebate into your expected payback. Verify with your specific utility (OG&E or PSO) before counting on any rebate dollar amount. Quotes that include a rebate line should be backed by current program documentation.
Battery — no rebate, resilience case
No statewide battery rebate in Oklahoma. Federal storage credit is $0 (§25D repealed for storage purchase).
Arbitrage gap on monthly excess is meaningful: retail about $0.108-0.138 vs avoided about $0.04 = gap about $0.07-0.10/kWh. Battery captures retail value on stored solar that would otherwise export to avoided cost. But $12,000 capex doesn't pay back on arbitrage alone.
Resilience case is real for Oklahoma: tornado alley (central OK is in the heart of it), severe Plains weather, summer storms, winter ice events (the 2021 ice storm left many Oklahoma customers without power for days). Battery as backup makes more sense than as ROI tool.
The honest payback — 15-20 years, low retail bites
At default install pricing of about $2.85/W (NREL benchmark), typical Oklahoma solar-only payback runs in the 15-20 year range with federal at $0.
- Sources citing about 10-13 year payback assume the now-dead 30% federal credit. Don't use those figures for 2026.
- Oklahoma's low retail rates (especially OG&E at ~$0.108) mean per-kWh savings are smaller than in higher-rate states — even though Oklahoma's sun resource is excellent. The math is bottlenecked on retail rate, not on production.
- Monthly excess at avoided cost further stretches payback for any system that produces more than its consumption in some months.
- Self-consumption and batteries add the most value because monthly excess earns very little. Right-size to your load, load-shift toward daylight where you can.
The bright spots: the permanent property tax exemption accrues for the full 25-year horizon, dollar credits roll forward indefinitely (no annual zero-out), and the world-class OK sun resource means high gross production per kW installed — your kWh production per dollar of capex is high, even if each kWh is worth less than in higher-rate markets.
VERIFIED 2026-06 · eia.govHow to read this — Oklahoma's case for solar
OK solar in 2026 is right-sizing-driven and self-consumption-driven — exports earn little, so the value is in offsetting your own usage.
- Right-size to your annual consumption. Monthly excess pays only avoided cost (about $0.04/kWh); within-consumption offset earns retail (~$0.108-0.138). The roughly 3-4x gap punishes oversizing. Match annual production to load.
- Verify your utility's specific tariff. OG&E and PSO follow the same OCC framework but differ in retail rate. Co-ops and municipals are NOT required to offer net metering — if you're not on an IOU, verify in writing.
- Reject any 30% federal credit on a 2026 cash purchase. §25D was repealed effective for systems installed after December 31, 2025 (OBBBA P.L. 119-21, signed July 4, 2025) — sites still citing "30% through 2032" are using the dead pre-OBBBA schedule.
- Reject any quote citing an Oklahoma state solar income tax credit. Doesn't exist. Ask for a 2026 statute citation; there isn't one.
- The permanent property exemption is real and accrues for the full 25-year horizon — that's the durable structural plus to anchor on.
- Don't bake in a utility rebate. OG&E and PSO rebate programs have been cited by some sources but recent verification does not confirm them as currently live for 2026 — verify with your utility before counting on rebate dollars.
- REC revenue is optional and small. Oklahoma's REC market is voluntary (NARR) — no SREC mandate. Treat any REC income as a bonus, not a load-bearing piece of payback math.
- Don't assume sales tax exemption. OK 4.5% state + local applies — verify your specific local combined rate.
- Battery for resilience, not ROI. No rebate, federal storage $0. Tornado alley + ice storm risk are the real cases for backup.
- Load-shift toward daylight to keep more of your production within the monthly retail-offset case rather than spilling to avoided-cost excess.
- Watch the OCC dockets. OG&E has petitioned to cut net-metering compensation in prior rate cases — as of early 2026 retail-rate offset is intact, but a shift toward avoided-cost-only is forward risk. Existing systems would likely grandfather but verify.
If you can right-size your system to annual consumption, capture retail offset on most of your production, and you're on OG&E or PSO (not a co-op with worse terms), Oklahoma solar is a respectable case in 2026 despite the low retail. The 15-20 year payback reflects the bottleneck on per-kWh value, not poor solar resource — OK actually has world-class sun. If you were counting on the federal credit, on a state credit, on guaranteed REC revenue, on a sales tax exemption, or on a live utility rebate without verifying — none of those apply.
Run your real Oklahoma payback →The honest picture
| Fact | Oklahoma | Source |
|---|---|---|
| Mechanism | Net metering — monthly retail offset + monthly excess at avoided cost | 17 O.S. §156; OAC 165:40:9; OCC |
| Federal credit | $0 (cash purchase) | IRS — §25D repealed under OBBBA P.L. 119-21 |
| State credit | NONE | (no statute) |
| SREC / REC | VOLUNTARY REC market (e.g., North American Renewables Registry); NO SREC mandate (15%-by-2015 goal was voluntary and lapsed) — small optional upside, not a guaranteed payment | NARR |
| Property tax | EXEMPT, PERMANENT — 100% of added home value exempt indefinitely | Oklahoma Tax Commission |
| Sales tax | NOT EXEMPT — OK state 4.5% plus local (combined typically about 8-9%) | Oklahoma Tax Commission |
| Net metering / export | Monthly production nets against consumption at full retail (~$0.108 OG&E / ~$0.138 PSO) up to consumption level | 17 O.S. §156; OAC 165:40:9 |
| Excess credit rate | Monthly excess purchased at AVOIDED ENERGY COST (about $0.02-0.08/kWh, modeled $0.04); dollar credits roll forward indefinitely | OCC dockets |
| Retail rate | About $0.108/kWh on OG&E; about $0.138/kWh on PSO (state avg about $0.121) | EIA; OG&E / PSO tariffs |
| Install $/W | About $2.85/W (NREL benchmark) | NREL |
| System cap | 300 kW DG / 125% of peak load | 17 O.S. §156; OAC 165:40:9 |
| Battery treatment | No statewide rebate; federal storage $0; arbitrage gap about $0.07-0.10/kWh on monthly excess | (no program); IRS |
| Payback range | About 15-20 years with federal $0 (sources citing about 10-13 years assume the dead 30% federal credit) | this calculator |
| Main risk | Net-metering compensation erosion — OG&E has petitioned the OCC in prior rate cases to cut compensation; as of early 2026 retail-rate offset intact, but future OCC filings could shift toward avoided-cost-only | OCC dockets |
| Utility coverage | Mandate applies ONLY to investor-owned utilities (OG&E + PSO) — co-ops and municipal utilities NOT required to offer net metering; terms vary | 17 O.S. §156 |
| Right-sizing | Important — monthly excess earns only avoided cost (well below retail); match annual production to consumption to keep most export within the retail-offset case | OAC 165:40:9 |
Before you commit:
- Reject any 30% federal credit on a 2026 cash purchase. §25D was repealed effective for systems installed after December 31, 2025 (OBBBA P.L. 119-21, signed July 4, 2025) — sites still citing "30% through 2032" are using the dead pre-OBBBA schedule.
- Reject any quote citing an Oklahoma state solar income tax credit. Doesn't exist. Ask for a 2026 statute citation; there isn't one.
- Right-size to your annual consumption. Monthly excess earns only avoided cost (about $0.04/kWh) vs retail offset within consumption (about $0.108-0.138/kWh). The roughly 3-4x gap punishes oversizing.
- Verify your utility before signing. OG&E and PSO follow the same OCC framework but differ in retail rate. Co-ops and municipal utilities are NOT required to offer net metering — verify in writing if not on an IOU.
- Don't bake in a utility rebate. Some sources cite past OG&E or PSO rebate programs; recent verification does not confirm them as currently live for 2026 — verify with your utility before counting on rebate dollars.
- Don't budget for guaranteed SREC revenue. Oklahoma's REC market is VOLUNTARY (NARR); no SREC mandate. Treat any REC income as a small bonus, not a load-bearing piece of payback.
- Don't assume sales tax exemption. OK 4.5% state + local applies — verify your specific local combined rate (varies by jurisdiction).
- The permanent property exemption is real. 100% of added home value exempt indefinitely — anchor your long-term math on this.
- Watch the OCC dockets for compensation-erosion risk. OG&E has petitioned in prior rate cases to cut net-metering compensation. As of early 2026 retail-rate monthly offset is intact, but a shift toward avoided-cost-only is forward risk.
Estimates only — avoided-cost export rates vary by utility filing and season; OG&E and PSO retail rates update with OCC rate cases; REC market pricing through NARR or similar registries is thin and not guaranteed; co-op and municipal utility terms vary widely and are not bound by 17 O.S. §156. Verify with the Oklahoma Corporation Commission, your specific utility (OG&E, PSO, or your co-op / municipal), and the Oklahoma Tax Commission. This is not financial advice.