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Two decisions — where the CT sits and which way its arrow faces — cause more hybrid misbehaviour than everything else on this site combined. Both have one Kent answer each.
For trained/authorized installers only. Isolate the AC conductor before clamping.

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Location: the grid connection point

CT direction rule: arrow on the CT always points toward the GRID — figure KNB-SVG-01

The CT clamps on the live conductor at the grid connection point (main incomer) — the one place it sees the site’s total import and export. On a load branch or sub-circuit it sees only a slice, and every control decision built on it is wrong.

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Direction: arrow toward the grid — the universal Kent rule

On both Kent platforms, the arrow printed on the CT points toward the grid. The Kent G3 source manual is blunt about the stakes: installed in the wrong direction, the hybrid cannot work normally.
Do not trust remembered arrow rules from other brands or videos — arrow conventions differ across the market, and “arrow to load” teachings are in circulation. On a Kent system the rule is arrow-to-grid, printed in both Kent source manuals, and it is always followed by the live test below.

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Prove it live — the convention-proof test

Directions can be argued; imports cannot. At commissioning (and after any CT rework):
  1. Grid ON, PV OFF → the display must show import.
  2. Step a heavy load → the grid figure must rise with it, correct sign.
  3. Kent G3: repeat per phase. 📷
Full procedure: Energy-Flow Test.

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The software direction settings — physical first

Both platforms hold a CT-orientation item in their menus. The Kent rule: fix the physical installation first; the software setting states the truth, it does not repair a miswire.
  • Kent M1: LCD Advanced holds Meter CT orientation (towards the grid).
  • Kent G3: Quick Setting’s CT direction — correctly installed = Forward; Reversal exists only to correct a CT that is physically reversed and cannot be re-clamped now.

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Common mistakes

  • CT on a sub-circuit “because the main was hard to reach” — control logic goes blind.
  • Arrow set from a remembered video instead of the Kent figure — then never live-tested.
  • Reversal selected to “fix” a reading while the real fault was location, not direction.
  • Three CTs correct on direction but swapped across phases — that failure mode lives on Meter & Phase Matching.

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When to escalate