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The Kent G3’s GEN/smart port takes one of three exclusive roles — generator input, AC-coupled PV inverter, or smart-load output — and its generator rules are stricter than most crews expect.
For trained/authorized installers only.

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Role 1 — Generator (three-phase only)

  • The GEN port accepts a three-phase DG only, sized ≤ the inverter’s rated power (max input 10 / 12 / 15 kW at 15.2 / 18.2 / 22.8 A).
  • Via the GEN port, the DG serves backup loads only. To also feed grid-side loads, connect the DG through an ATS on the grid side — the CT/meter is then mandatory.
  • Never combine a DG with a grid-tied inverter on the same system — damage risk.
  • The generator position must be correctly selected in the settings — a wrong selection can fail the system.
  • G-V dry contact (16-pin block pins 8/9): voltage-free, wired to the DG’s NO start relay. Open = DG off; short = DG start. In Auto mode the DG starts at the ON SOC and stops at the OFF SOC; Manual mode gives a start/stop control.
Single-phase-DG homes cannot use the Kent G3 GEN port. Route such a DG through a grid-side ATS — or the site belongs on the single-phase Kent platform. Raise it at survey, not at commissioning.

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Role 2 — AC-couple (retrofit PV inverter)

  • The coupled grid-tied inverter must be three-phase and ≤ the hybrid’s rated power.
  • Control is frequency-watt: set Max frequency = the PV inverter’s first-level over-frequency value + 0.1 Hz (confirm the PV inverter’s freq-watt response with its manufacturer first). At SOC ≥ 85 % the hybrid raises frequency to that value and stops the coupled inverter.
  • Max Export Control (Based on Export Power & SOC): on a sustained export breach the smart-port relay opens.

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Role 3 — Smart load

  • Select Smart load output; choose On-grid always on (load powered whenever grid is present) or Off-grid always off; set the OFF and ON SOC/voltage thresholds that shed and restore the load on battery level — backup loads always win.
  • Backup load + smart load together stay ≤ rated power.

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Common mistakes

  • A single-phase DG wired to the three-phase GEN port — discovered at the first outage.
  • DG feeding grid-side loads through the GEN port instead of an ATS.
  • Generator position not selected (or wrong) in settings after correct wiring.
  • Max frequency guessed instead of matched to the coupled inverter’s over-frequency setting.

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When to escalate