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Montana-Dakota Utilities solar interconnection: what it requires before you energize
How does Montana-Dakota Utilities detect unpermitted backfeed?
Being verified being verified
What happens if they catch you?
Being verified being verified
Small and DIY interconnection requirements
Their own wording: it is essential to contact MDU before beginning your project, and grid-connected generation requires an executed interconnection agreement. documented
The state split is everything here. Montana and Wyoming get net metering with kWh credits rolling up to 12 months. North Dakota and South Dakota get net billing: monthly excess is bought at MDU's avoided cost, currently 2.69 cents per kWh. documented
That ND number means exports are nearly worthless, so size strictly to self-consumption east of the state line. No MDU incentives exist in any state. documented
sources: MDU renewable & solar energy · MDU rates and tariffs
Related: Capital Electric Cooperative (ND (co-op))
Planning a zero-export or plug-in setup here? See the zero-export reality check and equipment notes.
Every claim above is evidence-graded: documented means it traces to the tariff or the utility's own filings, reported means a dated community report. The full table covers 53 utilities: see all of Gridrules.