Guides

UL 3700 is UL Solutions’ evaluation document for plug-in solar. See what it checks, which states name it, how ‘certified’, ‘compliant’ and ‘listed’ differ, and how to verify a claim yourself.

Most US plug-in solar laws cap output at 1,200 W, but the number alone does not tell you whether your wiring is safe. State-by-state limits, what UL Solutions says about branch-circuit overload, and a checklist before you plug in.