Oklahoma Solar Calculator

Enter your utility and monthly bill — get system size, net metering savings, federal ITC, and 25-year projections for OKC, Tulsa, and beyond.

Your Oklahoma solar inputs

Monthly electric bill?

Electric utility?

System size?

Oklahoma solar estimate

20 × 400W panels (8 kW system)

Recommended size for your bill: 10.7 kW

Monthly usage1,273 kWh/mo

Annual production (OK 5.0 PSH)11,680 kWh/yr

Annual savings (net metering)$1,285/yr

Gross system cost$22,000

Federal ITC (30%)-$6,600

State income tax creditNone (OK has no income tax)

Net cost after ITC$15,400

Payback period12.0 yrs

25-year savings$32,120

Oklahoma has net metering — exported solar credits your bill at the retail rate. Oklahoma's 5.0 PSH is one of the best in the US, compensating for the absence of a state income tax credit.

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How to Use This Calculator

Enter your monthly bill and select your utility

Oklahoma's three major utilities — OG&E (Oklahoma Gas & Electric), PSO (Public Service Company of Oklahoma), and OEC (Oklahoma Electric Cooperative) — each have slightly different rates. OG&E serves Oklahoma City and the surrounding metro; PSO serves Tulsa and eastern Oklahoma; OEC serves rural cooperative members. Enter your average monthly bill to calculate how much solar energy you can offset.

Oklahoma's 5.0 PSH is a hidden advantage

Oklahoma receives an average of 5.0 peak sun hours (PSH) per day — the same as Texas and significantly higher than the US average of 4.3. This means an Oklahoma solar system produces about 15% more energy than an identical system installed in a typical northern state. High irradiance compensates for the absence of a state income tax credit.

Net metering credits exported solar at retail

Oklahoma utilities are required to offer net metering, meaning excess solar energy sent to the grid earns credits at your retail electricity rate — the same rate you pay for power. These credits roll over monthly and are settled annually. This 1:1 retail credit makes solar ROI calculations straightforward: all solar production (whether self-consumed or exported) saves you money at the same rate.

The Formula

Monthly kWh = Monthly Bill ÷ Electricity Rate Annual Production = System kW × 1000 × 5.0 PSH × 365 × 0.80 efficiency ÷ 1000 Annual Savings = Annual Production × Retail Rate (net metering at 1:1) Gross Cost = System kW × 1000 × $2.75/W ITC Credit = Gross Cost × 30% Net Cost = Gross Cost − ITC Credit Payback = Net Cost ÷ Annual Savings

Oklahoma uses 5.0 peak sun hours (PSH) — OKC gets 5.1 PSH, Tulsa gets 4.9, the panhandle gets up to 5.5. The $2.75/W installed cost reflects competitive Oklahoma market pricing. Because Oklahoma has mandatory net metering at retail rates, the entire annual solar production is valued at your utility rate — a simpler and more favorable calculation than states with below-retail buyback.

Example

Sarah — Oklahoma City OG&E customer

Sarah pays $140/month to OG&E at $0.11/kWh. She wants an 8 kW system on her south-facing roof in OKC.

Monthly bill$140 (OG&E, $0.11/kWh)

System8 kW, south-facing

LocationOklahoma City, OK (5.1 PSH)

Result

Annual production~11,680 kWh/yr

Annual savings (net metering)~$1,285/yr

Gross system cost~$22,000

Federal ITC (30%)-$6,600

Net cost after ITC~$15,400

Payback period~12 years

25-year savings~$32,100

While Oklahoma's lower electricity rates (compared to national average) make payback slightly longer than coastal states, the strong 5.0 PSH and mandatory net metering at retail rates mean solar still delivers solid 25-year returns. Sarah's 8 kW system covers nearly all her annual usage.

FAQ

Does Oklahoma have a state solar tax credit? ▼

No — Oklahoma does not have a state income tax credit for solar. Oklahoma has no state income tax for most filers (it was phased out starting in 2022), so a state solar income tax credit would be irrelevant regardless. The primary incentive available is the 30% federal Investment Tax Credit (ITC), which applies to all Oklahoma residents. Some Oklahoma utilities also offer small rebates — check with your specific utility for any current programs.

How does net metering work in Oklahoma? ▼

Oklahoma utilities with more than 700,000 customers (OG&E and PSO) are required by law to offer net metering to residential solar customers. Exported solar electricity earns credits at your retail electricity rate — the same rate you pay to buy power from the grid. Credits roll over month-to-month. At the end of an annual period, any remaining credits may be reset or paid at a lower rate, depending on your utility. Net metering makes Oklahoma solar economics simple: every kWh of solar production saves you money at full retail value.

Is Oklahoma's sunshine good enough for solar? ▼

Yes — Oklahoma receives an average of 5.0 peak sun hours (PSH) per day, which is well above the US average of 4.3 PSH. The Oklahoma panhandle reaches 5.5+ PSH, making it one of the best solar resources in the central US. Even Tulsa, in the cloudier eastern part of the state, gets 4.9 PSH. Oklahoma's solar resource is comparable to Texas and significantly better than states in the Northeast or Pacific Northwest. High irradiance means more production per installed kW, which improves your return even with lower electricity rates.

Does Oklahoma have property tax exemption for solar? ▼

Oklahoma does not have a statewide solar property tax exemption. However, some Oklahoma counties and municipalities may have local exemption policies — check with your county assessor. Oklahoma property tax rates are relatively low (approximately 0.9% of assessed value), so the impact of solar on property taxes is modest compared to high-tax states. Solar systems do increase home value, which is a separate benefit from any tax treatment.

What solar system size do Oklahoma homes typically need? ▼

Oklahoma homes typically need 6-10 kW of solar capacity. The average Oklahoma home uses about 1,100-1,300 kWh per month (higher in summer due to A/C). With 5.0 PSH, an 8 kW system produces approximately 11,680 kWh per year — covering most or all of an average home's annual usage. Homes with electric heat, pools, or EV charging may need 10-14 kW. Use the recommended size shown in this calculator based on your specific bill.

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