Technical information

PV Grid-tied Residential Inverter and Integrated AC/DC Disconnect

Installation and Operation Manual

Note: AnexceptionexistsifadedicatedPVsystemACsub-panelis

usedtocombinemultipleinverters.ThededicatedPVsystem

ACsub-panelrequiresasinglebreakeratthemainutility

servicepanelforamultipleinverterinstallation.

Preparing for Wiring Multiple AC/DC Disconnects

The wiring raceway in the AC/DC disconnect allows a continuous run

of the AC, DC and system ground conductors between multiple inverter/

disconnect units.

1. Make sure each disconnect ON/OFF switch is in the OFF position.

2. Remove the screws from the lid of each disconnect.

3. Remove the side knockouts on each disconnect to access the wiring

raceway.

4. Insert a tting in each knockout opening so a continuous, water-tight

connection is created between each disconnect.

5. Route the AC, DC and the system ground conductors through each

disconnect, terminating applicable connections.

For instructions on connecting the PV array and the AC conductors inside

the disconnect, refer to the section

Wiring a Single Inverter with an

Integrated AC/DC Disconnect

on page 21.

Connecting the Ground Conductors of Multiple Units

System grounding requirements for a multiple unit system also uses a

single-point ground.

1. Connect the EGC coming from the rst PV array to the grounding lug

inside the disconnect cabinet of the rst unit.

2. Connect the remaining units with a continuous EGC, branching from

grounding lug to grounding lug.

3. On each unit, connect the EGC from the utility grid to the grounding

terminal of the AC connection.