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The Kent G3’s GEN port takes one of three exclusive roles: generator input, AC-coupled PV inverter, or smart-load output. The roles cannot run simultaneously, and the generator rules are stricter than most crews expect. Decide the role at survey — not at commissioning.
For trained and authorized installers only.

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Role 1 — Generator (Three-Phase Only)

The GEN port accepts a three-phase DG only, sized at or below the inverter’s rated power.
ModelMax GEN input powerMax input current
Kent G3 10KW10 kW15.2 A
Kent G3 12KW12 kW18.2 A
Kent G3 15KW15 kW22.8 A
Via the GEN port, the DG serves backup loads only. If the DG also needs to feed grid-side loads, connect it through an ATS on the grid side — the CT or meter is mandatory in that case.
Single-phase DG homes cannot use the Kent G3 GEN port. Route a single-phase DG through a grid-side ATS — or the site belongs on the single-phase Kent platform. Raise this at survey, not at commissioning.
Never combine a DG with a grid-tied inverter on the same system. The interaction can cause damage. Raise it at the design stage.

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Generator Wiring and Settings

  • G-V dry contact (16-pin block, pins 8/9): voltage-free contact wired to the DG’s normally-open start relay. Open = DG off. Shorted = DG start.
  • In Auto mode, the DG starts when SOC falls to the ON SOC threshold and stops when it reaches the OFF SOC threshold. Set both thresholds in the generator settings menu.
  • In Manual mode, you start and stop the DG from the HMI.
  • The generator position must be correctly selected in the inverter settings after wiring. A wrong or missing selection can prevent the system from operating correctly.

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Role 2 — AC-Couple (Retrofit PV Inverter)

1

Confirm the coupled inverter is three-phase

The coupled grid-tied inverter must be three-phase and rated at or below the G3’s rated power.
2

Confirm frequency-watt response

Check with the PV inverter manufacturer that its frequency-watt response is active and confirm its first-level over-frequency trip value.
3

Set Max frequency

In the G3 settings, set Max frequency = the coupled inverter’s first-level over-frequency value + 0.1 Hz. At SOC ≥ 85%, the G3 raises frequency to this value and curtails the coupled inverter.
4

Configure Max Export Control

On a sustained export breach, the smart-port relay opens and disconnects the coupled inverter. Set the export limit accordingly.
AC-couple export control behaviour is pending Kent validation. [KNB-VAL-10]

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Role 3 — Smart Load

Select Smart load output in the GEN port settings, then configure:
  • On-grid always on — load is powered whenever the grid is present.
  • Off-grid always off — load is shed during a grid outage.
  • OFF SOC threshold — the battery level at which the smart load is shed.
  • ON SOC threshold — the battery level at which the smart load is restored.
Backup loads always win — if the combined backup load and smart load exceed rated power, the smart load is shed first.

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Common Mistakes

  • A single-phase DG wired to the three-phase GEN port — discovered at the first grid outage.
  • DG expected to feed grid-side loads through the GEN port alone instead of via an ATS.
  • Generator position not selected or set incorrectly in settings after correct physical wiring.
  • Max frequency value guessed instead of verified from the coupled inverter’s specification.