With Enphase, rapid shutdown is built in


Many string inverter systems sold today require a workaround such as additional switches, control lines, or equipment modifications in order to comply with rapid shutdown requirements. With Enphase, you are all set. Rest assured that all Enphase systems installed inherently meet NEC 2014 and NEC 2017 rapid shutdown requirements. It’s a function of how they work.

When the AC utility source is removed in any way – through an AC breaker, AC disconnect, or removal of the main meter, for example – the microinverter performs its rapid shutdown function.


String inverters use workarounds to comply with rapid shutdown

To comply with rapid shutdown requirements, string inverters, including strings using optimizers, typically need either extra electrical equipment or are installed on the roof next to the array. Neither solution is optimal.


What’s new in NEC 2014 and 2017?

NEC 2014/2017, Section 690.12 applies to PV conductors over 10 feet from the PV array and requires that the conductors power down to 30 volts and 240 volt-amperes within 10 seconds of rapid shutdown initiation.

With Enphase, rapid shutdown is built in

Enphase installations fully meet the rapid shutdown requirements that were added in the 2014 version of the National Electrical Code (NEC 2014) relating to the installation of PV systems on buildings. Most states have adopted NEC 2014.

View the Enphase Energy Rapid Shutdown brochure.