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The Kent G3’s communication side determines how the unit talks to its battery, to a grid meter, to other inverters in a parallel fleet, and to the Kent monitoring system. Get the cable routes, terminal assignments, and DIP positions right before commissioning.
For trained and authorized installers only.

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COM Ports

PortTypeUsed for
COM1USBDatalogger stick only
COM2 / COM34-hole glands, Ø6 mmRJ45 runs: BMS, meter, parallel bus
COM4 / COM56-hole glands, Ø2 mm16-pin terminal-block wires (CTs, G-V dry contact)
Keep all unused gland holes plugged with their watertight caps. The COM2/COM3 fastening rings open at the side — feed cables in through the side openings, not straight through the gland face.

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Communication Terminals

TerminalFunction
METER (RJ45)Meter RS485 — A on pin 1, B on pin 2
BMS (RJ45)Battery CAN — CAN-H pin 4, CAN-L pin 5 (RS485A pin 6, B pin 3)
RS485 (RJ45)Third-party external devices
DRM (RJ45)Remote shutdown / demand response (optional)
P-A / P-BParallel bus connection points
L1CT / L2CT / L3CTCT inputs on the 16-pin block
GEN-V (pins 8/9)Generator start — voltage-free dry contact
ATS, GEN-S, GEN-DI, GND-DI, HS/HG pinsReserved — do not wire without written Kent guidance
BMS pinout and the Kent battery 4-5 crossover cable rule are covered on Battery Wiring.

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Parallel Systems — The Rules

Unit limit

Up to 6 identical units. Never parallel different models — a 12 kW and a 15 kW cannot share a bus.

Bus cable

Chain P-A / P-B with shielded CAT5. Maximum 5 m between adjacent units.

DIP switch

Both DIP pins ON at the first and last inverter in the chain. OFF on all middle units.

Battery bank

One shared battery bank for the whole fleet. BMS connects to the master inverter only.
  • Set addresses on the HMI: master = 1 (mandatory), slaves 2, 3, 4, 5, 6. Address 0 is never used.
  • Every unit must have its own datalogger stick. Without it, remote fleet firmware upgrades are impossible.
  • All paralleled units must share one ground point — see Earthing.

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DRM Port (Optional)

RJ45 pins 5 and 6: shorted together = inverter generates normally. Open = inverter shuts down within 5 s. This is a hidden cause of “inverter won’t start” on sites where someone wired the DRM port and the connection has been lost or was never shorted. Check it early in fault-finding.

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Datalogger

The USB port (COM1) accepts the approved Kent datalogger stick only — no other device. Keep the dust cover on when the stick is not fitted. Fit the stick physically during installation. Activation is done with Kent Central Command — documentation to follow.

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Common Mistakes

  • DIP pins left OFF at both chain ends — or ON in the middle units — causes intermittent parallel faults that are hard to trace.
  • A 12 kW and 15 kW unit paralleled “temporarily” — unsupported and will not operate correctly.
  • One datalogger shared across a 4-unit array — remote upgrade of the other three units is impossible.
  • Something other than the datalogger (phone charger, USB drive) plugged into the USB COM port.