Plug‑in solar spike
Plug‑in solar panels are surging as a low‑cost, easy‑install option — but experts warn about safety risks for renters and multi‑family buildings. States are responding: bills to ease balcony and DIY solar access are advancing, and Illinois is testing proposals to let renters use plug‑in systems to cut bills. (newscientist.com) (25newsnow.com) (thecooldown.com)
Senate Bill 3104, sponsored by State Senator Rachel Ventura, cleared the Illinois Senate Energy and Public Utilities Committee on March 13, 2026 and advances to the full Senate; an identical House version is filed as HB4524 by Rep. Daniel Didech. (senatorventura.com) The Illinois proposal would let households plug in small arrays and—according to advocacy analysis cited by reporters—would cap uncomplicated plug‑in systems at roughly 1,200 watts, with estimated household savings of up to $400 a year and current retail costs of about $3 per watt (~$2,000 per kit). (canarymedia.com) The bill would also preempt many HOA and landlord bans for very small units, carving out special protections for arrays of about 391 watts or less in the state text now moving through committees. (canarymedia.com) Industry safety infrastructure is being built in parallel: UL Solutions launched a plug‑in solar testing and certification program based on UL 3700 in January 2026 to define construction, connector, GFCI and overload requirements for these systems. (cleantechnica.com) Standards-focused technical guidance from UL and others flags concrete risks—overloaded circuits, bidirectional current flow, and user‑accessible inverter outputs—and UL’s March webinar and outline name proprietary connectors, bidirectional Class A GFCI protection, and overcurrent safeguards as key mitigation measures. (ul.com) Regulatory and engineering bodies have issued operational warnings: the UK’s Institution of Engineering and Technology advised on March 24, 2026 that older wiring and legacy RCDs (safety switches) may not safely handle exported power and recommended competent‑electrician checks before use. (theiet.org) Policymakers point to overseas precedent: Germany’s market hit roughly one million registered “balcony” plug‑in systems by mid‑2025, an adoption spike regulators and industry groups say was driven by simplified rules and mandatory registration. (bundesnetzagentur.de)
