10.2 RAPID SHUTDOWN (RSD)
The inverter includes a rapid shutdown system that complies with 2017 and 2020 NEC 690.12
requirements. A rapid shutdown switch should be connected to the RSD terminals on the master
inverter and mounted on a readily accessible location outdoors (check with your AHJ for specific
requirements). For paralleled systems, the RSD needs only to connect to the master inverter. When the
switch is engaged, it will shut down all inverters in parallel past the master.
Note: When using supported EG4 batteries in closed-loop communications with the inverter, the RSD
also initiates ESS Disconnect as required by NEC code
The system can utilize an External E-Stop Switch if your AHJ deems it necessary. When doing so,
setting 28 must be set to Enable to engage the function.
Type of External E-Stop Switch for RSD Requirements:
The external switch must have normally closed contact type for emergency shutdown.
10.2.1 EXTERNAL RSD WIRING INSTRUCTIONS
The image below showcases an example diagram using a Tigo RSD Transmitter (not
included). Wire the E-Stop Switch into the RSD terminals on the master inverter as shown
below, following the switch’s specifications. Please refer to the switch’s manual for exact
specifications and wiring instructions.
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