South Dakota Clean Energy Guide
South Dakota is a renewables-heavy, export-oriented small electricity market that got clean the way the free market prefers, not the way policymakers usually plan for. Wind supplies the majority of in-state generation and, stacked on top of Missouri River hydropower, gives the state one of the highest carbon-free electricity shares in the country. It did all of that with no renewable portfolio standard, no statewide net-metering mandate, and no state income tax to fund incentives. This guide covers what actually drove that build-out, where the siting fights are, and why a much-hyped data-center wave just hit a legislative wall.
Source: American Clean Power Association
Last updated: July 5, 2026
Grid: Split Between SPP, WAPA and the Co-ops
South Dakota does not sit under one ISO. The eastern portion falls within the Southwest Power Pool (SPP); parts of the west are in the Western Interconnection served by the Western Area Power Administration (WAPA), which markets Missouri River federal hydropower. Basin Electric Power Cooperative and its member co-ops (East River, Sioux Valley Energy) are major load-serving entities alongside investor-owned Xcel Energy (NSP) and NorthWestern Energy. That fractured, co-op-heavy structure shapes how load and cost decisions get made.
Learn more about SPPA Clean Grid With Almost No Clean-Energy Policy
The headline number depends on which basket you count. The American Clean Power Association puts wind, solar and storage at 56.9% of South Dakota's electricity, second only to Iowa. On a rolling-year basis, wind alone runs 57-59% of generation, Missouri River hydropower adds roughly 22-25%, and total low-carbon generation lands around 82% — high enough that some state reporting has pegged the all-carbon-free share as high as 92% for 2024 and ranked South Dakota first in the nation per capita at 19,422 kWh of low-carbon generation per person. The state is a net exporter: it produced 20,871,994 MWh in 2024 against retail sales of 13,637,204 MWh, selling the surplus into the regional market.
What makes South Dakota genuinely unusual is that it built all of this with essentially no policy scaffolding. There is no mandatory renewable portfolio standard and no clean energy standard — only a voluntary objective adopted in 2008 (SB 152) targeting 10% renewable and recycled energy by 2015, a non-binding goal with no enforcement and no penalties. The state blew past it on wind economics alone. This is the honest lesson of South Dakota: cheap, abundant wind and open land did the work that mandates do elsewhere.
No Net Metering, No SRECs, No Income Tax
South Dakota is one of the few states with no statewide net-metering mandate. The PUC does not require utilities to offer it; whether and how to compensate customer-sited solar is left to individual utilities and cooperatives, and there is no guaranteed retail-rate credit. There is no SREC market and no state solar rebate. What the state does offer is a renewable-energy property-tax framework for commercial wind, solar and storage — a partial property-tax exemption paired with an alternative production tax on nameplate capacity and gross receipts — layered on top of the fact that South Dakota has no personal or corporate income tax at all. Federal ITC and PTC remain the primary incentives, which makes the OBBBA tax-credit phaseout a live variable for any project still chasing a construction-start deadline.
The Siting Line: 100 MW to the State, Everything Else to Counties
Utility-scale siting runs through the Energy Facility Siting Act, SDCL Chapter 49-41B, administered by the PUC. Wind and solar "energy conversion facilities" of 100 MW or more need a state construction permit; anything under 100 MW is permitted locally through county zoning and conditional-use permits (wind facilities over 5 MW must at minimum notify the PUC). Under SDCL 49-41B-22, the applicant carries the burden of proving, by a preponderance of the evidence, that the project complies with applicable law and will not seriously harm the environment or the social and economic conditions of area residents. The PUC sets setbacks, noise limits and decommissioning terms case by case. SB 108 (2025), which would have dropped the state threshold to 50 MW and pulled more mid-size projects into state review, died on March 31, 2025 — so the 100 MW line still holds, and the sub-100 MW county tier is exactly where the fights concentrate.
The Projects: A Northeast Wind Belt and a Record-Breaker
South Dakota's wind fleet is concentrated in the wind-rich northeast, with more than 3,595 MW of wind installed per the PUC project list. The operating anchors are large by any measure:
- Dakota Range I & II (304 MW): 72 turbines in Grant/Codington counties, owned by Xcel Energy (Northern States Power), online 2022 — currently the largest operating wind farm in the state.
- Deuel Harvest Wind Farm (301 MW): 109 turbines in Deuel County, Southern Power / Invenergy, online 2021.
- Triple H Wind Project (250 MW): 92 GE turbines in Hyde County by Engie North America, with offtake to Walmart, Boston University and Basin Electric, online November 2020.
- Prevailing Wind Park (219.6 MW): 57 turbines across Bon Homme, Charles Mix and Hutchinson counties, developed by sPower with offtake to Basin Electric, online March 2020.
Philip Wind: The Largest Ever Approved
The record-breaker is still on paper. The Philip Wind Project — 333 MW and up to 87 turbines in Haakon County, roughly 85 miles east of Rapid City — is an Invenergy subsidiary (Philip Wind Partners) carrying a price tag near $750 million and interconnecting through Basin Electric and WAPA. The PUC approved it on February 12, 2026; construction is expected to start in June 2026 with commercial operation targeted for December 2027. When it comes online it will be the largest wind farm in the state, edging out Dakota Range.
Project Big Stone: A Thermal Battery for the Wind Surplus
The most interesting non-wind story is a storage bet on what to do with all that surplus. Project Big Stone, in Big Stone City (Grant County), pairs California's Antora Energy with South Dakota ethanol producer POET and financing from Grok Ventures. It is a 5 GWh, multi-day thermal energy storage system that captures excess wind power and stores it as heat in solid carbon blocks at roughly 4,000°F, then delivers steam and heat to POET's 92-million-gallon-per-year ethanol plant. Commissioned May 19, 2026, with full operation expected October 2026, it is billed as among the world's largest energy storage projects by capacity — a direct play on monetizing wind that would otherwise be curtailed.
Siting Fights Are Local, Not Statewide
The opposition story in South Dakota is one of geography, not a statewide revolt. The fights cluster in the higher-population southeastern counties near Sioux Falls and among non-participating landowners, while large projects in the wind-rich northeast — Deuel, Grant, Codington, Clark, Hand and Hyde counties — have generally kept advancing. There is no organized statewide ban. For a running view of the flashpoints, see our South Dakota opposition tracker.
The sharpest example is Lincoln County, near Sioux Falls, which adopted a temporary moratorium on commercial and utility-scale wind and solar in October 2023 and has repeatedly extended it into 2025 while it rewrites its zoning and setback ordinances. Well-organized landowner opposition has turned out in force at county board hearings, effectively stalling projects from developers such as Apex. In the northeast, Deuel County has seen active permitting fights — including South Deuel / Deuel Harvest-area proposals spanning tens of thousands of acres — with PUC public-input meetings drawing opponents over setbacks and land use, even as many of those projects ultimately win approval.
At the state level, House leadership pushed 2025/2026 legislation to sharply increase mandatory turbine setbacks from neighboring and non-participating properties. It was killed in the House Commerce and Energy Committee — a telling result. There is no single statewide setback number in statute; the PUC imposes them case by case for large projects and counties set their own below 100 MW. The Summit carbon-pipeline fight is a related but separate flashpoint that has hardened landowner-rights politics across rural South Dakota.
Data Centers Wanted the Wind — Then the Legislature Said No
The dominant emerging demand story is data-center and AI infrastructure interest, drawn by cheap wind power, a cold climate that cuts cooling costs, and no state income tax. Basin Electric member co-ops report a surge of inquiries, and the numbers are eye-watering: a single hyperscale data center could use six to ten times the electricity of the entire city of Brookings. Two flagship proposals defined the wave — Applied Digital's roughly 430 MW campus near Toronto in Deuel County (about $5 billion) and Gemini Data Center SD LLC's roughly 500 MW facility, which won Sioux Falls annexation approval for about 160 acres in October 2025.
Then the 2026 Legislature changed the math. Lawmakers rejected House Bill 1005, which would have granted hyperscale data centers a 50-year sales and use-tax exemption. Instead, Governor Larry Rhoden signed two data-center restriction bills in March 2026: they let the PUC bill data centers for regulatory-review costs, require separate utility terms and cost reimbursement so the load pays its own way, mandate water-supply compatibility findings, and bar the state from overriding local ordinances that limit data centers. Basin Electric had already adopted a policy to charge data centers full cost of service to protect other members' rates. Applied Digital promptly said its project "doesn't make sense at this time" and signaled it would let its land agreement lapse.
The upshot: the demand exists, but South Dakota chose to make it pay for itself rather than subsidize it. That is a defensible ratepayer-protection stance, but it cools the near-term load-growth thesis that would have justified even more wind. Two longer-run threads round out the picture — regional transmission expansions aimed at relieving the state's transmission-limited wind belt (historically the hard cap on wind growth here), and early legislative moves to study nuclear power for firm capacity, though no reactor is planned.
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Frequently Asked Questions
How much of South Dakota's electricity comes from renewables?
A lot. Wind alone supplied roughly 57-59% of in-state electricity generation in 2024-2025, the second-highest wind share of any state behind Iowa. Add Missouri River hydropower (about 22-25%) and a small but growing amount of solar, and roughly 80% or more of South Dakota's electricity comes from carbon-free sources. The American Clean Power Association pegs the wind, solar and storage share at 56.9% (2nd nationally, data through 1Q 2026), and by some clean-energy measures the state ranks first in the country.
Does South Dakota have a renewable portfolio standard (RPS)?
No. South Dakota has no mandatory RPS or Clean Energy Standard. It has only a voluntary renewable-energy objective, adopted in 2008, of 10% of retail electricity from renewable and recycled energy by 2015. The goal is non-binding, with no penalties. Ironically, the state blew past that voluntary target on the strength of wind economics rather than any mandate.
Who permits large wind and solar projects in South Dakota?
The South Dakota Public Utilities Commission (PUC) permits utility-scale energy facilities of 100 MW or more under the Energy Facility Siting Act, SDCL Chapter 49-41B. Projects under 100 MW are permitted locally by counties through zoning and conditional-use permits. A 2025 bill (SB 108) that would have lowered the state threshold to 50 MW failed, so the 100 MW line still holds in 2026.
What is the largest wind farm in South Dakota?
Among operating projects, the largest are Dakota Range I & II (304 MW, Xcel Energy, Grant/Codington counties) and Deuel Harvest (301 MW, Deuel County). The biggest ever approved is the Philip Wind Project, a 333 MW, up-to-87-turbine, roughly $750 million Invenergy project in Haakon County that the PUC approved in February 2026, with construction expected to start in June 2026 and operation targeted for December 2027.
Is there local opposition to wind and solar in South Dakota?
Yes, but it is localized rather than statewide. Lincoln County, near Sioux Falls, has kept a moratorium on commercial wind and solar in place since 2023 and repeatedly extended it while rewriting its ordinances. Fights over setbacks and land use also surface at PUC hearings for northeastern projects. At the state level, a 2025/2026 push to mandate much larger turbine setbacks was defeated in committee. Many projects in the wind-rich northeast counties have still been approved.
Are data centers coming to South Dakota, and what does that mean for clean energy?
There is strong data-center interest thanks to cheap wind power, a cold climate and no state income tax, including a proposed ~430 MW Applied Digital campus near Toronto and a ~500 MW Gemini project near Sioux Falls. But in 2026 the Legislature rejected a data-center sales-tax exemption and instead passed restrictions requiring data centers to pay their own way for utility and water service. Applied Digital said its project no longer made sense without incentives, so near-term load growth is uncertain even as utilities like Basin Electric field a wave of inquiries.
The Outlook: Cheap Wind, Hard Wires, Disciplined Demand
South Dakota is not a clean-energy leader because of ambition — it is one because of arithmetic. World-class wind, open land, hydropower on the Missouri, and no income tax added up to an ~82% carbon-free grid without a single binding mandate, $8 billion in cumulative investment, and about $42.4 million a year in taxes plus $31 million in land-lease payments to farmers and ranchers. The near-term ceiling is physical, not political: the wind belt is transmission-limited, which is why regional power-line expansions matter more here than any incentive program.
The next chapter turns on two questions. Does the 333 MW Philip project break ground on schedule in June 2026 and reset the state's size record — and can the northeast counties keep permitting while Lincoln County stays frozen? And does data-center demand come back on the Legislature's pay-your-own-way terms, or stay parked the way Applied Digital did? With federal ITC and PTC support facing OBBBA phaseouts and the state offering little of its own, South Dakota's build-out will keep living or dying on wind economics and wires. That has worked so far. The honest bet is that it keeps working, just more slowly than the boosters promise.