South Dakota solar in 2026

The bill and the export are not worth the same thing

This is a state where the retail electricity row can mislead. It tells you what a self-used solar kWh can avoid. It does not tell you what your utility has to pay for a surplus kWh. The gap is why a giant array sized for annual production is usually the wrong opening move.

South Dakota does not promise retail net metering

The South Dakota PUC says solar generation is not compensated at a net-metered rate. Regulated utilities must interconnect with and buy from small facilities if the generator accepts the terms, but the minimum purchase rate is avoided cost, the utility's incremental cost of supplying power. For facilities below 100 kW, purchase rates are filed with the PUC, and investor-owned utility rates also need PUC approval.

That sets the operating rule: design first for the electricity you consume while it is produced, then ask for the current avoided-cost tariff before signing. Storage can have a real job here if it moves midday production into your own evening load. Do not let an estimate quietly credit every exported kWh at the retail rate.

Policy source: South Dakota PUC solar FAQ.

South Dakota interconnection has a real checklist

The state policy is not ambiguous: the South Dakota PUC says solar generation is not compensated at a net-metered rate. Regulated utilities must interconnect with and purchase power from small solar facilities when the generator accepts the terms. The floor is avoided cost, meaning the incremental expense the utility avoids by supplying the power itself. For facilities under 100 kW, purchase rates are filed with the PUC, and investor-owned utility rates also need PUC approval. The right first document is the current purchase rate, not an annual-savings illustration. South Dakota PUC solar FAQ

Black Hills Energy shows what the fine print can look like. It installs a bidirectional meter and credits excess each billing cycle at its current avoided-cost rate. Its Tier 1 covers inverter-based residential and commercial installations of 10 kW AC or less. The design needs a lockable disconnect near the meter and compliance with UL 1741 and IEEE 1547. The application fee is $50.00, and the one-time bidirectional-metering fee is another $50.00, with proof of liability insurance required. These are manageable items, but they belong in the quote scope. Black Hills Energy interconnection terms

The property-tax rule is a separate decision point. For renewable-energy facilities below five megawatts, the exemption is the greater of $50,000 of assessed value or 70% of assessed value. The statute defines solar as using the sun to produce electricity or energy. That protects against part of an assessment increase. It does not turn avoided-cost exports into retail-rate savings. One warning deserves to stay blunt: a state agency page still carries obsolete federal-credit language. Use it for the state interconnection framework, not for current federal tax advice. SDCL 10-4-44 PUC page

South Dakota had 509 reported net-metered PV customers in 2024, including 469 residential customers, even though the regulator does not compensate solar at a net-metered rate. EIA counted 217.3 MW of utility-scale PV and 4.1 MW of small-scale PV in May 2026, or 221.4 MW total. That split reinforces the central homeowner question: a large statewide project base does not tell you what a household export receives. The tariff does. EIA South Dakota profile EIA PV capacity table

South Dakota checks before you sign

• Get the current avoided-cost purchase rate from the utility, in writing, before comparing bids. (PUC framework)
• At Black Hills Energy, Tier 1 is limited to inverter-based installations of 10 kW AC or less and requires a lockable disconnect plus UL 1741 and IEEE 1547 compliance. (Black Hills Energy)
• Black Hills lists a $50.00 application fee and a $50.00 one-time bidirectional-metering fee. Those are small against the system price, but they prove why an interconnection checklist belongs in the contract. (Black Hills Energy)
• The PUC page still contains obsolete federal-credit language. The current federal homeowner credit ended December 31, 2025, so do not use that page as your tax advice. (PUC page)

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Answer four questions to see a South Dakota estimate built from the EIA and PVGIS assumptions here. We are a solar installer and we also partner with other solar companies. Details in our disclosures.