South Dakota solar calculator
Size a South Dakota 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 $0.1537/kWh and 4.7 peak sun hours, a $200/month bill needs about 11.89 kW — 29 × 410 W panels covering ~58 m². Gross cost is ~$41,734 with no federal credit for systems installed after 2025, offsetting $2,400 a year for a ~17.4 year payback.
Your details
Ballpark, not gospel. Ballpark, not gospel. Sized at 78% real-world output with the South Dakota sun-hour average — confirm shading, roof angle and your utility's PURPA avoided-cost rate with a local installer before buying. South Dakota has no net metering at all — surplus earns roughly 2.5–4.9¢/kWh under avoided-cost rules. The calculator values all generation at your retail rate; exports earn far less, so real savings track self-consumption and batteries.
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 South Dakota system sizes by monthly bill
| Monthly bill | System size | Panels (410 W) | Net cost (no 2026 federal credit) | Payback |
|---|---|---|---|---|
| $100 | 6.15 kW | 15 | $21,586 | 18.0 years |
| $200 | 11.89 kW | 29 | $41,734 | 17.4 years |
| $300 | 18.04 kW | 44 | $63,320 | 17.6 years |
Computed at $0.1537/kWh, 4.7 peak sun hours and $3.51/W installed, with no federal credit for 2026 installs. Run your exact bill above.
Solar in South Dakota: the details
Solar cost in South Dakota
Solar is expensive to install in South Dakota. The EnergySage marketplace averaged about $3.51 per watt installed in 2026, with market quotes typically landing $2.98–$4.03/W — well above the $2.50–$3.50/W national band. A typical ~12 kW South Dakota system grosses around $41,700 before any incentives, with no federal credit for 2026 homeowner installs.
What moves the number: roof complexity, panel tier, and — unusually — how few installers bid. South Dakota's thin installer market is the reason quotes skew high; get at least three quotes — spreads of $0.50/W between installers are common.
Export rules: getting paid for surplus power
South Dakota has no net metering — at all. It is one of only two states (alongside Tennessee) with no net-metering-style program of any kind. Instead, utilities buy surplus from customer systems under PURPA qualifying-facility rules at filed avoided-cost rates — roughly 2.5–4.9¢/kWh depending on the utility, against a ~15.4¢ retail rate.
PPAs are not allowed in the state, which closes off the one financing path that would dodge the export problem. Practical takeaway: size the system to your daytime load and self-consume everything you can — every kWh you export sells for about a sixth of what you buy.
South Dakota solar incentives
South Dakota has no state rebates or tax credits, but qualifying solar equipment is exempt from property tax under SDCL 10-4-44 — the added home value won't raise your assessment.
Beyond that, there is little to stack: no utility rebate programs of note, and PPAs are not allowed. With the 30% federal credit gone (see above), the tax exemption is the whole ballgame here.
Is solar worth it in South Dakota?
Verdict: only with heavy daytime use. The calculator puts a $200/month bill at a ~17.4-year payback with no federal credit — and that flatters the economics, because it values exports at the retail rate. With no net metering and surplus bought at 2.5–4.9¢/kWh, solar here is a pure self-consumption play: size to your daytime load, shift what you can into solar hours, and consider batteries. High quotes plus low export value make this one of the tougher states in the country.
Questions people actually ask
Straight answers, no fluff. Then run your own numbers above.
How many solar panels do I need in South Dakota?
It follows your bill. At the South Dakota average of $0.1537/kWh and 4.7 peak sun hours, a $200/month bill needs about an 11.89 kW system — roughly 29 × 410 W panels covering ~58 m² of roof.
What is the average cost of solar panels in South Dakota in 2026?
Solar is expensive to install in South Dakota. The EnergySage marketplace averaged about $3.51 per watt installed in 2026, with market quotes typically landing $2.98–$4.03/W — well above the $2.50–$3.50/W national band. A typical ~12 kW South Dakota system grosses around $41,700 before any incentives, with no federal credit for 2026 homeowner installs.
Does South Dakota have net metering?
No. South Dakota has no net metering — one of only two states (with Tennessee) without any net-metering-style program. Utilities buy surplus from qualifying facilities under PURPA rules at filed avoided-cost rates (roughly 2.5–4.9¢/kWh depending on the utility). PPAs are not allowed here.
Does South Dakota offer any solar tax credit or rebate?
No state rebates or tax credits, but qualifying solar equipment is exempt from property tax under SDCL 10-4-44. There are no utility rebate programs of note — and the thin installer competition is why quotes average $3.51/W.
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 South Dakota?
Verdict: only with heavy daytime use. The calculator puts a $200/month bill at a ~17.4-year payback with no federal credit — and that flatters the economics, because it values exports at the retail rate. With no net metering and surplus bought at 2.5–4.9¢/kWh, solar here is a pure self-consumption play: size to your daytime load, shift what you can into solar hours, and consider batteries. High quotes plus low export value make this one of the tougher states in the country.
Figures last checked October 2026. Sources: EIA Electric Power Monthly, NREL PVWatts/NSRDB, DSIRE, South Dakota Public Utilities Commission; IRS — Residential Clean Energy Credit.
More US solar calculators
Compare other states: Texas, Florida, California, Arizona, North Carolina, Tennessee, Utah, Vermont, Virginia, Washington, West Virginia, Wisconsin, Wyoming. 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.