Discover your exact solar savings potential in South Dakota. We factor in local utility rates, sun hours, and state-specific incentives to give you an accurate ROI estimate.
DISCLAIMER: All estimates are approximations based on regional averages. Actual savings vary by location, roof orientation, utility provider, and installer. This calculator does not guarantee specific savings.
Electricity rates last updated: August 2026 (source: EIA)
Find out how much you can save based on your location and current energy usage.
South Dakota Codified Law § 10-4-44 provides a property tax exemption for renewable energy systems under 5 megawatts that produce electricity, which includes virtually all residential rooftop solar installations. The exemption covers the first $50,000 of assessed value OR 70% of assessed value, whichever is greater. For most residential systems, 70% of assessed value will exceed $50,000, so the 70% floor is the operative benefit. Unlike South Dakota's geothermal exemption under the same statute (which caps out at 4 years for residential properties), the solar electricity-producing exemption has no specified expiration date in the statute — making this a durable, long-term incentive that protects homeowners from property tax increases attributable to their solar investment for the foreseeable future. This is one of the most favorable property tax structures for residential solar in the country.
South Dakota is one of the few states in the country without a statewide net metering mandate. No state law or regulatory order requires utilities to offer net metering on uniform terms. Xcel Energy, which serves portions of eastern South Dakota, voluntarily offers net metering for residential systems up to 40 kW and credits excess generation at the full retail rate. However, Black Hills Energy (serving much of western and central South Dakota), NorthWestern Energy, and rural electric cooperatives across the state are not required to offer net metering and their policies vary significantly. Some may offer avoided-cost crediting at rates far below retail; others may have no formal program. This is a major source of uncertainty compared with states that mandate retail-rate net metering statewide. Homeowners must contact their specific utility and confirm current interconnection and compensation terms before committing to a solar installation.
South Dakota averages roughly 5.2 peak sun hours per day statewide — a strong solar resource, above the national average of approximately 4 peak sun hours per day. There is meaningful regional variation: the Black Hills region in the west averages closer to 4.6 peak sun hours per day due to terrain and weather patterns, while the eastern plains — including Sioux Falls — average closer to 5.8 peak sun hours per day. More peak sun hours per day means more electricity generated per installed kilowatt of panel capacity, which directly improves both payback period and lifetime savings. For homeowners in eastern South Dakota especially, the solar resource is genuinely competitive with sunnier states in the Southwest.
South Dakota's average residential electricity rate is roughly 13 to 14.5¢/kWh depending on the source and time period — approximately 22% below the national average, one of the more affordable states for electricity. Lower electricity rates mean each kWh your solar panels generate offsets fewer dollars of grid-purchased electricity compared with high-rate states. This extends the payback period compared with what the same system would achieve in a state like Rhode Island (28–30¢/kWh) or California. The combination of a strong solar resource and South Dakota's solid property tax exemption can partially offset the impact of lower rates, but homeowners should model their savings using realistic South Dakota-specific rates and their actual utility's net metering terms rather than national averages.
South Dakota has no state income tax at all — it is one of only a handful of states in the country that levy no personal income tax. This is a structural fact about South Dakota's tax system, not a solar-specific limitation: there is simply no income tax mechanism against which to apply a solar tax credit. Homeowners should not expect a state solar income tax credit — it does not exist and cannot exist in the current tax structure. This is different from states that have income taxes but simply choose not to offer a solar credit; in South Dakota, the absence of a state income tax means no such credit is possible.
South Dakota does not exempt solar equipment purchases from its state sales tax. The current state sales tax rate is 4.2% (temporarily reduced from the prior 4.5% rate, with the reduction scheduled to sunset back to 4.5% on July 1, 2027). Unlike many other states that offer a sales tax exemption specifically for solar energy equipment as an incentive, South Dakota provides no such exemption. Homeowners purchasing a residential solar system in South Dakota should budget for sales tax on equipment as part of the total installed cost.
The 30% federal residential solar tax credit (Section 25D) expired December 31, 2025 under the One Big Beautiful Bill Act and does NOT apply to solar energy systems installed in 2026 or later. Any installer or comparison website claiming a 30% federal credit is currently available for South Dakota homeowners is providing outdated information. For South Dakota homeowners, the state property tax exemption under SDCL 10-4-44 is the primary available incentive for 2026 installations.
Everything you need to know about solar incentives, costs, and savings in your area.