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UL official tells House committee UL 3,700 addresses plug‑in PV safety; members press on plugs, circuits and certification timing
Summary
A UL Solutions representative told the House Energy committee that UL 3,700 requires protective measures for plug‑in photovoltaic (PIPV) products (overcurrent protection, specialized connectors, bidirectional GFCI) and that the standard is being used for product certification; committee members asked about dedicated circuits, 391‑watt exemptions, lightning and grid registration.
A representative from UL Solutions told the House Energy and Digital Infrastructure Committee that UL 3,700 is a finalized set of requirements used to certify plug‑in photovoltaic (PIPV) products and that the standard includes protections intended to address unique safety hazards created when a consumer device feeds power back into a home's wiring.
Committee members asked technical questions about overcurrent protection, connector safety, low‑power exemptions and certification timelines. The UL representative said UL 3,700 does not require a dedicated circuit but provides two alternative approaches for nondedicated circuits: an…
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