Missouri solar calculator
Size a Missouri home solar system from your electric bill — kW, panel count, roof area, true cost with no federal credit for 2026 installs, and payback.
Quick answer: At $0.162/kWh and 4.6 peak sun hours, a $200/month bill needs about 11.48 kW — 28 × 410 W panels covering ~56 m². Gross cost is ~$28,528 with no federal credit for systems installed after 2025, offsetting $2,400 a year for a ~11.9 year payback.
Your details
Ballpark, not gospel. Ballpark, not gospel. Sized at 78% real-world output with the Missouri sun-hour average — confirm shading, roof angle and your utility's net-metering terms with a local installer before buying. The savings math values all generation at your retail rate; size to your monthly usage, since surplus credits earn a small avoided-fuel credit and expire uncompensated after 12 months.
The 30% credit ended — what changed
The residential clean energy credit (26 U.S.C. § 25D) gave homeowners a 30% credit on solar installed from 2022 through 2025. The July 2025 tax law ended it: no credit is available for property placed in service after December 31, 2025. That is why every figure on this page is ~30% higher than pre-2026 guides show. If your system went live by the end of 2025, tick the box above to see the credit applied; leased systems may still benefit because the leasing company claims the commercial credit. Source: IRS — Residential Clean Energy Credit.
Typical Missouri system sizes by monthly bill
| Monthly bill | System size | Panels (410 W) | Net cost (no 2026 federal credit) | Payback |
|---|---|---|---|---|
| $100 | 5.74 kW | 14 | $14,264 | 11.9 years |
| $200 | 11.48 kW | 28 | $28,528 | 11.9 years |
| $300 | 17.22 kW | 42 | $42,792 | 11.9 years |
Computed at $0.162/kWh, 4.6 peak sun hours and $2.49/W installed, with no federal credit for 2026 installs. Run your exact bill above.
Solar in Missouri: the details
Solar cost in Missouri
Solar installs in Missouri run at the low end of the national price band. The EnergySage marketplace averaged about $2.49 per watt installed in 2026, with market quotes typically landing $2.11–$2.86/W — just under the $2.50–$3.50/W national band. A typical ~11 kW Missouri system grosses around $27,500 before any local utility incentive, with no federal credit for 2026 homeowner installs.
What moves the number: roof complexity, panel tier, and how competitive the quote market is in your metro. Get at least three quotes — spreads of $0.50/W between installers are common.
Export rules: getting paid for surplus power
Missouri's Net Metering and Easy Connection Act gives systems up to 100 kW one-to-one retail netting — within each monthly bill.
The catch is the month-end surplus: it becomes only a small credit at the utility's avoided fuel cost (roughly 1.9–3.8¢/kWh), which expires uncompensated after 12 months.
Practical takeaway: size the system to your monthly usage and don't oversize — surplus generation earns almost nothing. The 1:1 monthly netting covers what you actually use, which is most of the value.
Missouri solar incentives
No major statewide solar incentive was found in 2026 sources.
And one that used to exist is gone: Missouri's solar property-tax exemption was struck down by the state Supreme Court in August 2022, so panels can raise your property assessment.
Check DSIRE for any utility-specific programs in your service territory.
Is solar worth it in Missouri?
Verdict: solid, if you size to usage. A $200/month bill lands at an ~11.9-year payback with no federal credit, and monthly 1:1 netting covers everything you use within the month. The one rule: don't oversize — surplus credits earn only ~2–4¢/kWh and expire uncompensated after 12 months.
Questions people actually ask
Straight answers, no fluff. Then run your own numbers above.
How many solar panels do I need in Missouri?
It follows your bill. At the Missouri average of $0.162/kWh and 4.6 peak sun hours, a $200/month bill needs about a 11.48 kW system — roughly 28 × 410 W panels covering ~56 m² of roof.
What is the average cost of solar panels in Missouri in 2026?
The EnergySage marketplace averaged about $2.49 per watt installed in 2026, with market quotes typically $2.11–$2.86/W — just under the $2.50–$3.50/W national band. A typical ~11 kW system grosses around $27,500, with no federal credit for 2026 homeowner installs.
Does Missouri have net metering?
Yes, monthly. Missouri's Net Metering and Easy Connection Act gives systems up to 100 kW one-to-one retail netting within each monthly bill — but any month-end surplus becomes only a small credit at the utility's avoided fuel cost (roughly 1.9–3.8¢/kWh), which expires uncompensated after 12 months. Size the system to your monthly usage; oversizing earns almost nothing.
Does Missouri offer any solar tax credit or rebate?
No — no major statewide solar incentive was found in 2026 sources. Note that Missouri's old solar property-tax exemption was struck down by the state Supreme Court in August 2022, so panels can raise your property assessment.
Is the 30% federal solar tax credit still available?
Not for homeowner purchases anymore. The residential clean energy credit (26 U.S.C. § 25D) is not available for property placed in service after December 31, 2025, under the July 2025 tax law (Public Law 119-21). Systems installed by the end of 2025 can still claim 30%, and leased systems may still benefit because the leasing company claims the commercial credit instead. (Source: IRS — Residential Clean Energy Credit.)
Is solar worth it in Missouri?
The calculator puts a $200/month bill at an ~11.9-year payback with no federal credit — solid, if you size to your usage. Monthly 1:1 netting covers what you use within the month; the trap is oversizing, since surplus credits earn only ~2–4¢/kWh and expire after a year.
Figures last checked October 2026. Sources: EIA Electric Power Monthly (July 2026: 16.22¢/kWh), NREL PVWatts/NSRDB (~4.6 peak sun hours), DSIRE, Missouri Public Service Commission; IRS — Residential Clean Energy Credit.
More US solar calculators
Compare other states: Texas, Florida, California, Arizona, North Carolina, Michigan, Minnesota, Mississippi, Montana, Nebraska, Nevada, New Hampshire, New Jersey. And the national US solar calculator for country averages.
Comparing quotes? The solar cost calculator breaks down cost per watt and the solar ROI calculator maps your payback year by year. Going deeper: installation cost guide, how net metering works, how much you can save with solar and the solar batteries guide.