aka 'Balcony Solar' -backfed plug-in solar is already legal and heavily installed in western EU countries (DE).
Unless quashed by lobbyists, this could be a big deal for the US.
CraftStrom's Smart Plug & Play Solar Kits Are Already NEC & UL Compliant - CleanTechnica
https://cleantechnica.com/2025/04/14/craftstroms-smart-plug-play-solar-kits-are-already-nec-ul-compliant/