Disconnect the energy storage power switch

Is a DC disconnect considered a PV system disconnect?

The DC disconnect will stop the inverter from producing power but the AC side of the inverter will still be connected to the utility. Therefore this wouldn’t be considered the PV system disconnect as not all the PV equipment is disconnected. Of course, it wouldn’t be Code if there weren’t special cases and exceptions.

Does a solar inverter have a DC disconnect?

In both cases, the answer here would be yes. Either the external disconnect or the breaker in the electrical panel disconnects all the equipment that is part of the PV system converting the solar energy to electrical energy. A common question we hear is “What about the integrated DC disconnect on the inverter?

Do I need a source and equipment disconnect?

Depending on the ESS design and components, a combination of source and equipment disconnects might be needed to isolate the ESS from other systems, the premise wiring, and the utility grid. Disconnect devices may satisfy source and equipment requirements within a single enclosure or switch.

Where should Enphase Energy System (EES) disconnecting devices be mounted?

NOTE: Enphase Energy System (EES) disconnecting means may need to be mounted in a readily accessible location, within sight of equipment or outside. NOTE: To meet additional requirements of the NEC, the rapid shutdown device may need to be mounted in a readily accessible location or outside.

What is an automatic disconnect and synchronize function?

An MID’s automatic disconnect and synchronize function ensures safe operation in parallel with, or independent of, a utility power source. A single device can provide the equipment disconnecting means and the source disconnecting means if it meets both sets of requirements.

Do isolation disconnects have to be readily accessible?

Isolation disconnects do not have to be readily accessible. Those devices that may remain energized in the open position shall be properly labeled, per 2017 NEC 690.13(B) and 2020 NEC 705.20. A microgrid interconnect device (MID) is responsible for safe disconnection and reconnection to operate in parallel with a primary power source.