First UL 3700-Certified Plug-In Solar Microinverter Hits the US Market

Hoymiles' HiFlow Pro is the first plug-in solar microinverter certified under UL 3700, now available to US buyers. UL 3700, adopted in December 2025, is the first North American safety standard for plug-in PV systems — letting homeowners and renters connect small solar panels directly to household outlets, skipping conventional permitting and inspection.