Solar Panels in South Dakota
Est. net savings
$1,266
Year-1 Bill Savings (Example) · no federal credit
Typical result:
- 8 kW example system (about 20 panels)
- $22,800–$27,700 before incentives
- 13–28 year simple payback, no federal credit
- No statewide net metering
25 years without solar vs with solar
Assumes 3%/yr rate increases, 0.5%/yr panel degradation and no federal tax credit (the 30% §25D credit ended for systems installed after Dec 31, 2025). How we calculate
Without solar
25-year utility bills
$29,800
Rates rise ~3% per year
With solar
System cost + remaining bills
$25,200
Installed cost, no federal credit
Difference
Estimated 25-year net
+$4,600
Before any state or utility incentives
South Dakota Solar at a Glance (2026)
| Item | What to know |
|---|---|
| Example system | 8 kW, about 20 panels at 400 W |
| Installed cost before incentives | $22,800–$27,700 ($2.85–$3.46 per watt) |
| Federal homeowner credit (25D) | Expired for systems placed in service after Dec 31, 2025 |
| State incentives | Property tax exemption only; no state income tax credit and no sales tax exemption |
| Net metering | No statewide mandate; terms set by each utility or co-op |
| Average residential rate | 15.4 ¢/kWh (EIA, July 2026) vs. 18.3 ¢/kWh U.S. average |
| Peak sun hours | About 4.7 per day (NREL, Aberdeen) |
| Simple payback, no federal credit | About 13–28 years, depending on self-use and price |
South Dakota homes are served by investor-owned utilities such as Black Hills Power (Black Hills Energy), Northern States Power (Xcel Energy), and NorthWestern Energy, plus rural electric cooperatives and municipal utilities. Because export terms differ by provider, check your own utility’s tariff before you request quotes. For nearby comparisons, see our guides for North Dakota, Iowa and Wyoming.
How Much Do Solar Panels Cost in South Dakota in 2026?
Published 2026 price averages for South Dakota fall between about $2.85 and $3.46 per watt before incentives. SolarReviews lists $2.85 per watt (updated September 2026), and EnergySage reports $3.46 per watt (updated September 2026). Other sources publish higher averages, so treat any single figure as a starting point and rely on local quotes.
| System size | At $2.85/W | At $3.46/W |
|---|---|---|
| 5 kW | $14,250 | $17,300 |
| 7.2 kW | $20,520 | $24,910 |
| 8 kW | $22,800 | $27,680 |
| 10 kW | $28,500 | $34,600 |
Prices are calculated as system size × cost per watt and are before any incentives. With the federal homeowner credit expired, the installed price is close to your real out-of-pocket cost.
Net Metering in South Dakota: What Your Utility Actually Pays for Exports
South Dakota has no statewide net metering law. Instead, each utility or cooperative decides how to credit solar power that flows back to the grid, and many pay a low avoided-cost rate rather than the retail rate. Under South Dakota law, utilities file minimum purchase rates for small renewable facilities with the Public Utilities Commission. As one example, Heartland Consumers Power District filed a standard rate of 2.192 cents per kWh for 2026 for qualifying facilities of 100 kW or less. Your own utility’s number will differ.
The gap matters. A kWh you use inside your home offsets about 15.4 cents of retail power, while an exported kWh may earn only a few cents.
Chart summary: A kWh used at home offsets roughly 15.4 cents of retail electricity, while the example export rate is about 2.2 cents. That makes self-use worth about seven times as much as exporting. Export rates vary by utility, so confirm yours before you size a system.
Black Hills Energy proposed a rooftop-solar tariff in 2021 (South Dakota PUC docket EL21-011), and Dakota Rural Action reported that the proposed fee was successfully opposed in late 2023. Policies can change, so ask your utility for the current interconnection rules, any fees, and the review timeline in writing.
This is why sizing matters more here than in net metering states. Instead of sizing to 100% of your annual bill, size to the power you can use during the day, then add capacity only if you plan to add an EV or other load. Our solar net metering calculator helps you test different system sizes.
South Dakota Solar Incentives in 2026: What Is Still Available
The biggest change for 2026 is federal. The One Big Beautiful Bill Act, signed July 4, 2025, ended the Section 25D Residential Clean Energy Credit for systems placed in service after December 31, 2025. Homeowners who bought and installed a system by that date can still carry forward any unused credit on IRS Form 5695. For a new system in 2026, there is no 30% homeowner credit.
Third-party-owned systems (leases and power purchase agreements) are treated differently. Under the Section 48E business credit, projects must begin construction by July 4, 2026, or be placed in service by December 31, 2027. A provider may pass some of that value through in lower pricing, but it is not guaranteed, so ask for the pricing assumptions in writing.
At the state level, the options are limited:
- Property tax exemption: South Dakota exempts the first $50,000 or 70% of the assessed value of qualifying renewable energy property, whichever is greater (SDCL 10-4-44). Confirm how it applies with your county director of equalization.
- State income tax credit: None. South Dakota also has no individual state income tax.
- Sales tax exemption: None for residential solar equipment.
- Utility programs: Check DSIRE and your utility for any current programs.
You can estimate any remaining tax benefit with our solar tax credit calculator and confirm your situation with a tax professional.
Does the Math Work? Real Payback Numbers for South Dakota Homeowners
We modeled an 8 kW system using these inputs, so you can check or adjust them:
- Production: About 10,980 kWh per year, calculated as 8 kW × 4.7 peak sun hours × 365 days × 80% system efficiency.
- Retail rate: 15.4 cents per kWh (EIA, July 2026).
- Export value: 2.5 cents per kWh, a rounded example based on South Dakota avoided-cost filings.
- Cost: $22,800 ($2.85 per watt) or $27,680 ($3.46 per watt), with no federal credit.
- Simplifications: Flat rates and no degradation in the simple payback figures.
| How much solar you use on site | Year-1 savings | Payback at $22,800 | Payback at $27,680 |
|---|---|---|---|
| 100% | $1,691 | 13.5 years | 16.4 years |
| 70% (30% exported) | $1,266 | 18.0 years | 21.9 years |
| 50% (50% exported) | $982 | 23.2 years | 28.2 years |
Chart summary: Payback depends mostly on two things: the installed price and how much solar power you use yourself. Using 100% on site pays back in about 13.5 to 16.4 years, while exporting half your output stretches payback to 23 to 28 years. Homes with strong daytime use sit at the faster end.
Two factors can improve the picture. First, electricity prices have been rising: South Dakota’s residential average was 14.52 cents per kWh in July 2025 and 15.37 cents in July 2026 (EIA). One year is not a forecast, but if rates grew 3% per year, the 70% self-use case at the middle cost ($25,240) would pay back in about 16 years instead of about 21 once panel degradation (0.5% per year) is included. Second, a longer ownership period captures more of the 25-year or longer panel life.
For a 25-year view using the 70% self-use case, the middle cost, flat rates, and 0.5% annual degradation, the system avoids about $29,800 in electricity purchases against a $25,200 cost, a net gain of about $4,600. That excludes financing costs and any inverter replacement, so run your own numbers with our solar ROI calculator.
Chart summary: Both lines start at the installed cost and climb as bill savings accumulate. The lower-priced system crosses zero in about year 19, and the higher-priced system in about year 23, after 0.5% annual degradation. Faster payback needs more daytime self-use, a lower quote, or rising electricity rates.
Battery Storage and EVs: Squeezing More Value from a South Dakota Solar System
Because exports earn so little, shifting solar power into the evening can be worth more in South Dakota than in net metering states. A 13 kWh battery averages about $10,466 in South Dakota (range $8,896–$12,036; EnergySage, May 2026), or about $805 per kWh. The 30% homeowner credit that once covered batteries has also ended for 2026 purchases.
A rough check: if a battery shifts 3,000 kWh per year that would otherwise be exported at 2.2 cents and instead offsets 15.4 cents of retail power, it adds about $400 per year in value. At that rate, bill savings alone do not repay a $10,000+ battery within a typical warranty period. The stronger case is backup power for blizzards, ice storms, and rural outages, where the alternative is a standby generator and fuel.
Electric vehicles are a better fit. At about 30 kWh per 100 miles, driving 12,000 miles a year uses roughly 3,600 kWh. Charging during the day from your own panels raises your self-use rate, which is exactly what improves payback when exports pay little. Our battery storage calculator can model both options.
Choosing a South Dakota Solar Installer and Getting Accurate Quotes
Start with your last 12 months of utility bills and ask each installer to show how it sized the system, what production it assumes, and what export rate it used. A quote that assumes full retail credit for every exported kWh is a red flag in a state without statewide net metering.
- Compare at least three written quotes and use cost per watt to line them up.
- Ask about export terms and fees from your utility or co-op in writing.
- Look for credentials, such as NABCEP-certified installers, and check reviews and local references.
- Confirm permits and interconnection timelines for your city, county, and utility.
- Ask about ownership structure. Cash or loan purchases no longer qualify for the 25D credit, while some leases and PPAs may reflect business-credit savings.
- Check the warranty, including inverter coverage, and plan for an inverter replacement during the system’s life.
Use NREL’s PVWatts tool to check any installer’s production estimate against your address, roof direction, and shading.
Sources
- U.S. Energy Information Administration, Electric Power Monthly, Table 5.6.A (residential price by state, July 2026)
- SEIA: Clean energy provisions in the One Big Beautiful Bill
- Heartland Consumers Power District PURPA rate filing, South Dakota PUC
- EnergySage: Cost of solar panels in South Dakota (September 2026)
- SolarReviews: South Dakota solar panel cost (September 2026)
- EnergySage: Energy storage cost in South Dakota (May 2026)
- Dakota Rural Action: Black Hills Energy rooftop solar tariff
- NREL PVWatts and National Solar Radiation Database (peak sun hours)
- South Dakota Codified Laws 10-4-44 (renewable energy property tax exemption)
Frequently asked questions
Direct answers for US homeowners in South Dakota.
South Dakota solar by electric bill
See system size and payback for common monthly bills in South Dakota.
View South Dakota solar data & incentives →Major electric utilities in this state
Export credits, fees and interconnection rules differ by utility — confirm the current solar tariff with yours before sizing a system.
How these numbers were calculated
- Electricity rate
- 14.5¢/kWh — South Dakota average residential price. Source: EIA Electric Power Monthly, Table 5.6.B (year-to-date through July 2026), residential average retail price (July 2026) (EIA)
- Solar production
- 4.8 peak sun hours/day × 0.82 system derate. Approximate state-average daily solar resource (peak sun hours) based on NREL solar resource data (NSRDB); not location-specific — use NREL PVWatts for an address-level estimate. (NREL PVWatts)
- Installed price
- $3.00 per watt before incentives. Blended 2026 US residential installed price used by this site; EnergySage marketplace reported about $2.60/W (mid-2026); full-market medians are higher.
- Federal tax credit
- $0 for homeowner-owned systems installed in 2026 — the 30% §25D credit ended Dec 31, 2025 (IRS)
- Net metering
- No statewide net metering — utility-dependent — solar assumed to offset 55% of the bill. South Dakota has no statewide net-metering law; export credits depend on the utility and are usually low.
- Model
- Version 2026.10 · 3%/yr electricity price escalation · 0.5%/yr panel degradation · simple payback = installed cost ÷ year-1 savings
- Policy checked
- · Full methodology · Report an error
Estimates only — not tax, legal or financial advice. Get at least three installer quotes and confirm incentives with your utility and a tax professional.