A disconnect switch that enables rapid shutdown allows firefighters to physically flip a switch to reduce the electrical voltage of your solar panel system to safe levels in less than a minute. Surprisingly, simply turning off a solar inverter doesn’t always do this on its own: with some inverter setups, wires and circuits can remain energized even if the inverter is turned off, increasing the risk of shock for the firefighters working on top of your roof or in your attic. Hopefully, your home never catches on fire and you don’t even have to worry about rapid shutdown functionality – but if it does, firefighters can use rapid shutdown solutions to de-energize your solar panel system just in case they need to go up on your roof. The National Fire Protection Association (NFPA) wrote rapid shutdown requirements into the NEC in an effort to keep first responders safe. Simply put, it provides a way to quickly de-energize a rooftop solar panel system. TECH RAPID JUMP CODERapid shutdown is an electrical safety requirement set for solar panel systems by the National Electrical Code (NEC). If you’ve just installed a solar panel system or are looking at a picture of one, you may notice a box with an on/off switch that says “rapid shutdown.” But what does rapid shutdown mean, and why is it important for a solar panel system? In this article, we’ll give an overview of rapid shutdown requirements, how they vary by state, and list some popular inverter options that are compliant with rapid shutdown requirements.
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