Interconnection agreement
By Priya Nair · Last reviewed The formal contract between a generator owner and their utility authorizing a grid-connected energy system, traditionally required for rooftop solar. State plug-in solar laws typically work by exempting qualifying small systems from exactly this requirement — Utah's HB 340 is the template.
Why it matters
Whether you need one is the central practical question in US states without a plug-in framework, and the reason 'ask your serving utility' recurs across WattRank's state pages. The exemption from interconnection paperwork, more than any technical provision, is what state plug-in laws actually deliver.