Prairie’s Edge Casino Defeats Utility in Solar Dispute After Power Disconnection Threat

Minnesota energy regulators have cleared the way for a tribal casino to fire up a massive solar array after ruling that its electric utility acted unlawfully by threatening to pull the plug on the property, The Minnesota Star Tribune reports.

The Minnesota Public Utilities Commission (PUC) voted unanimously last week that Minnesota Valley Cooperative Light and Power Association cannot disconnect the Upper Sioux Community’s Prairie’s Edge Casino Resort over its 2.5-megawatt solar project.

Minnesota Valley, a small cooperative utility serving parts of western Minnesota, claimed the 2.5-megawatt array vastly exceeded the 40-kilowatt limit it sets for members. The utility threatened to cut off electricity to the casino if the tribal nation turned the system on.

The ruling means the array—which has sat unused for a year and a half despite being fully built—can finally be switched on once an independent engineer completes a safety review and the tribe resolves any resulting technical recommendations.

‘What You’re Doing is Wrong’

The PUC ordered the utility to continue supplying electricity to the casino provided the solar system remains behind the meter—meaning it does not export power onto the wider grid.

“What you’re doing is wrong,” Commissioner Audrey Partridge told the cooperative during Thursday’s hearing, according to news reports. “I think you have lost your tether to the purpose of an electric utility.”

The decision follows a long-running battle over the multimillion-dollar solar project, which the Upper Sioux Community began developing in 2024 to curb electricity costs and advance its clean-energy goals.

In November 2024, Minnesota Valley issued the tribe a cease-and-desist order and threatened to disconnect Prairie’s Edge if the system was activated. The tribe countered that the utility’s generation restrictions did not apply because the system was designed solely to power its own property and would not feed electricity back onto the grid.

The array, which includes an 800-kilowatt battery storage system, is expected to cover about 30% of the casino’s electricity needs. Prairie’s Edge is the Upper Sioux Community’s principal economic engine, helping fund housing, healthcare, education, and public safety.

In June, Administrative Law Judge Joseph Meyer sided with the tribe, finding Minnesota Valley’s policies did not prohibit behind-the-meter generation and that disconnecting the casino would violate the cooperative’s obligation to provide service.

More than two dozen other Minnesota electric cooperatives subsequently backed the findings, agreeing that threatening disconnection over a non-exporting solar project violated core cooperative principles.

‘Unlawful and Unreasonable’

The PUC largely adopted Meyer’s recommendations, ruling that Minnesota Valley acted “unlawfully and unreasonably” by threatening the tribe.

In a rare punitive move, commissioners also directed the Minnesota Attorney General’s Office to investigate the cooperative for potential statutory violations, which carry fines between $100 and $1,000 per infraction.

The commission also agreed with the state Department of Commerce’s assessment that the cooperative’s actions were driven by concerns over lost electricity sales rather than legitimate safety risks.

Commissioners pointed to evidence suggesting the tribe may have already been overcharged compared to other member customers.

The Upper Sioux Community also argued that, as a sovereign tribal nation, it is not subject to Minnesota utility regulations. The commission declined to rule on the sovereignty question, concluding it was unnecessary to resolve that issue to determine that Minnesota Valley could not prevent the casino from generating its own power.

An attorney for Minnesota Valley told commissioners the cooperative plans to appeal the order.

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