Alpha ESS SMILE-G3-S3.6 Installation, Operation & Maintenance Manual page 49

Step 1:

run the CT cables through the cable gland of the COM connection cover but don't tighten the strain
relief of the cable glands yet.

Insert the RJ45 plugs into the relevant RJ45 sockets.
Step 2:

close the magnetic clamp of the Grid CT on the grid-supply cable. The ideal place for the Grid CT
is between the Retail Meter and the Main Switch. If placed on either side of the Service Fuse, be
very careful not to accidentally capture any Controlled Loads.

The arrow on the casing of the Grid CT should point to the Grid port of Smile-G3-inverter. In more
common terms, the arrows of both CTs "point toward the toaster".

In general, Controlled Loads should NOT be captured in the CT clamp.
Step 3:

For hybrid or AC-coupled storage system application, close and latch the magnetic clamp of the PV
CT on the ac output cable(s) of the installed PV inverter(s). The arrow on the magnetic buckle of
the PV CT should point to the mains grid.

If multiple PV Inverters are installed, ensure the PV CT captures the combined output either by
combining the PV inverter outputs into a single wire to clamp or clamping multiple wires. If clamp-
ing multiple wires, ensure that the multiple wires are aligned such that the arrow on the CT does
not point to any of the PV Inverters. Failure to follow this instruction would result in one PV output
being subtracted from the other in the CT clamp measurement calculations.
Step 4:

Connect the CT cables to the Grid CT Port and PV CT Port on the Battery Inverter.

Only secure the cover in place after the CTs/Meter comms cable, the BMS cable and the LAN cable
(if used) have been clipped into their respective Ports.

When securing the cover over the comm ports, tighten the cover in place and then lightly push the
comms cable into the cover as you tighten the strain relief gland onto the cables. This will ensure
the comms cables are well-seated in the RJ45 ports.
The CT cable marked Grid CT should be connected to the Grid CT Port, and
the CT cable marked PV CT should be connected to the PV CT Port on the
inverter.
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