Where do AHJs require additional module-level shutdown on Solar Roof despite Tesla’s UL 3741/PVRSE path—are inspectors consistently accepting MCI-based rapid-shutdown designs without MLPE?
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Good news! Most building inspectors are okay with Tesla’s way of doing things with MCIs, seeing it as good enough for rapid shutdown safety. So, you probably don’t have to use module-level gadgets if your system is listed right and put in place following Tesla’s instructions.
Now, some local authorities might be working with older rules and still want module-level shutdown, even if you have a Tesla system. This could bring some changes or delays when you’re trying to get things approved. Just make sure your plans and permits match UL 3741 rules, and keep your string maps and setup instructions clear. That is the secret to getting a thumbs-up without any trouble.
Authorities Having Jurisdiction (AHJs) may require additional module-level shutdown on Solar Roof systems despite Tesla’s UL 3741/PVRSE path, depending on local regulations and interpretations of the National Electrical Code (NEC). The UL 3741 standard allows for a holistic system-level approach to rapid shutdown compliance without requiring Module-Level Power Electronics (MLPE) devices.
Some AHJs, especially in states with stricter fire-safety interpretations, still require additional module-level shutdown on Solar Roof despite Tesla’s UL 3741/PVRSE listing often in jurisdictions where inspectors default to NEC 690.12(C) MLPE rules. Acceptance of MCI-based rapid-shutdown designs varies, so early coordination with the AHJ and documented compliance is key.