All 53 utilities / Alliant Energy (WPL)
Alliant Energy (WPL) solar interconnection: what it requires before you energize
How does Alliant Energy (WPL) detect unpermitted backfeed?
Being verified being verified
What happens if they catch you?
Being verified being verified
Small and DIY interconnection requirements
Wisconsin's PSC 119 statewide rules with state-approved forms, same framework as WE Energies. Applications are classified by size, and their page recommends pulling a summary report from their Distributed Generation Assist tool before designing. documented
Netting is retail up to your monthly usage, and monthly excess cashes out at the avoided-cost credit, an average of 4.254 cents as of Jan 2026, updated annually. Size to usage or sell your surplus cheap. documented
Above 20 kW you land on the PgS-1 parallel generation rate where the meter doesn't net at all. documented
Moving target warning: Alliant pushed hourly netting in its rate case and the PSC's statewide net metering investigation is still open, so these rules are actively in motion. documented
sources: Alliant WI customer interconnection · Wisconsin PSC customer-owned generation
Related: WE Energies (WI) · National Grid (MA)
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.