Underwriters Laboratories (UL)

Rule Changes

As of October 2026: Certification body for plug-in solar systems

California renters and apartment dwellers can now plug small solar panels into wall outlets without utility permission. Gov. Gavin Newsom signed the Plug and Play Solar Act on Sept. 30, legalizing "balcony solar" systems up to 1,200 watts and making California the 10th state to do so.

Updated Oct 7