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Grounding the Kent G3 comes before any PV, battery or AC wiring: the external chassis ground terminal, the system ground through the wire box, and the one extra rule for parallel fleets.
For trained/authorized installers only. An unearthed inverter is a shock hazard and an SPD without a path to ground protects nothing.

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Before you start

  • Earth pit measured and photographed per Earthing & Protection. [KNB-VAL-14 — measure and record; escalate poor soil before energising]
  • PE conductor for the AC side prepared at 10 mm² (6 AWG) per the AC table.

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External grounding conductor

Kent G3 external grounding conductor connection — figure KNB-G3-CR-04

  1. External ground points are provided on both sides of the inverter; use the right-side terminal as standard.
  2. Crimp an M5 OT ring terminal onto copper earth wire (solid or stranded; size per local code and the AC PE figure).
  3. Fit to the chassis ground terminal and torque to 3.3 N·m.

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System ground

Run the grounding conductor from the main service panel’s ground bar to the ground bar inside the inverter wire box, alongside the AC PE terminations.

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Parallel systems

All paralleled inverters connect to the same ground point — eliminating any voltage potential between inverter grounds.
Pending Kent validation — do not configure in the field. [KNB-VAL-04] Backup N-E bond-relay behaviour and the approved RCD scheme (both platforms) are under written confirmation. Until published here: follow the Kent N-E test in the commissioning checklist and never improvise an external N-E bond.

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Common mistakes

  • Grounding “through the mounting bracket” — the M5 terminal with a crimped lug is the path.
  • Two paralleled inverters on two different earth pits.
  • SPDs fitted with long, looping earth leads that defeat their clamping.

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When to escalate