US states ease plug-in solar rules as UL Solutions sets standard
Updated
Updated · The Conversation · May 4
US states ease plug-in solar rules as UL Solutions sets standard
8 articles · Updated · The Conversation · May 4
Utah passed a 2025 exemption for systems under 1,200 watts; Maine has enacted one, Colorado's bill awaits the governor, and Vermont's Senate has approved similar legislation.
The changes aim to let consumers use small solar kits without permits, utility approval or professional installers, while UL's new safety standard could boost confidence in home use.
Plug-in systems, popular in Europe, typically cost $1,200 to $2,000, can cut bills by hundreds of dollars yearly, and may especially help renters and households facing rooftop-solar barriers.
As millions plug in their own solar panels, is the aging U.S. power grid prepared for this decentralized energy revolution?
With new laws passed but no safety-certified products yet available, are early adopters of plug-in solar taking an uncertified risk?
Plug-In Solar Revolution 2026: Safety Standards, State Legislation, and Expanding Energy Equity
Overview
The rapid rise of plug-in solar systems created an urgent need for clear safety standards, prompting Utah to pass a pioneering balcony solar law in March 2025. This law acted as a catalyst, inspiring UL to release the UL 3700 safety standard in January 2026, which defines essential safety features like automatic power cut-off and grid backfeed prevention. UL 3700 quickly became a key reference for state legislation, leading Maine and Virginia to enact similar laws in 2026. Amid soaring electricity prices and utility rate hikes, plug-in solar offers affordable bill reductions and greater access for renters and those with unsuitable roofs. Despite utility pushback, over 30 states are now actively considering legislation, signaling a major shift toward broader, safer adoption of plug-in solar technology.