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Committee to hear ISO on UL 3700 and weighs appliance‑efficiency and motor standards
Summary
Lawmakers reviewed ISO and UL testimony about grid safety standards for plug‑in solar (UL 3700 and IEEE/ILE E1547), agreed to hear ISO at a short follow‑up session, and debated whether to add appliance motor standards now or seek more testimony.
The House Energy & Digital Infrastructure committee reviewed written comments from ISO and UL on April 22 about interconnection and safety standards for plug‑in photovoltaics and discussed whether to adopt technical language in bill S202.
ISO requested language tying plug‑in PV inverters to interconnection performance consistent with IEEE/ILE E1547 standards. Committee members and witnesses discussed whether UL 3700 and IEEE/ILE E1547 should be referenced explicitly; some members were inclined to add ISO’s suggested language to ensure interoperable and safe behavior of inverters, while others cautioned against adding requirements that might unduly burden small plug‑in devices.
Members scheduled a short appearance by ISO for the next day to clarify technical recommendations. The committee also discussed appliance‑efficiency standards (H600) and whether to include electric motor standards now; several members favored updating existing standards and agreed that motors may require additional testimony before inclusion.
Next steps: ISO will return for a brief session to answer questions about draft language; committee staff will consider ISO’s suggested interconnection language and whether to incorporate appliance standards or defer motor requirements to a later vehicle.
