Plug-in (balcony) solar is a low-cost, plug-and-play alternative to traditional rooftop PV, gaining traction in the U.S. as states adopt legislation exempting small systems from interconnection requirements. Most states cap systems at 1,200 W and require UL 3700 safety certification, addressing risks such as circuit overload, electric shock and GFCI compatibility while costs and payback periods remain attractive.
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