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The Kent M1 senses grid power flow using the in-box CT or a supported energy meter. Place and orient the CT correctly and zero-export, self-use, and the energy display all work. Get it wrong and the inverter operates blind — or actively misbehaves. This page covers placement, wiring, meter options, and what the fault codes tell you.
For trained and authorised installers only. Isolate the AC conductor before clamping anything around it.

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The CT rule

Install the CT using this three-step procedure:
1

Choose the right conductor

Clamp the CT on the grid main L (live) conductor at the grid connection point. Never clamp on a load branch, and never clamp around L and N together.
2

Orient the arrow toward the grid

The arrow on the CT must point toward the grid — this is the universal Kent rule across all platforms. Reversed CT causes reversed power signs and incorrect control behaviour.
3

Close and land the leads

Close the CT cap until it clicks into lock. Land the CT leads on CT+ and CT− of the 16-way communication strip.
On the LCD, navigate to the Advanced page and set:
  • Meter CT orientation: towards the grid
  • CT Ratio: exactly as shown on the shipped CT’s nameplate
Pending Kent validation. [KNB-VAL-08] The shipped CT scheme and ratio per Kent SKU are under confirmation. Until published here: read the ratio off the CT’s nameplate and enter exactly that value — never assume a factory default is correct.

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Meter option

Where a supported energy meter is used instead of, or alongside, the CT, the following models are supported:
ModelType
DDSU666Single-phase, 2P 1CT
DTSU666Three-phase, 4P 3CT or 4P 6CT
ADL200N-CTSingle-phase CT meter
ADL400N-CTThree-phase CT meter
ADW200-D16-2SMulti-function meter
Wire the meter RS485 interface as follows:
  • Meter A → METER(A) terminal on the 16-way strip
  • Meter B → METER(B) terminal on the 16-way strip
On the three-phase meter’s RJ45: A maps to pin 3, B maps to pin 6.
Follow the wiring figure for the exact meter model and CT count — position and direction errors show up as wrong power readings and incorrect energy totals.

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AC-coupled retrofit schemes

For sites with an existing grid-tied solar inverter being retrofitted with a Kent M1:
  • Single-phase home: use a 3-CT meter with CT-A on the grid conductor and CT-B on the existing solar inverter output.
  • Three-phase supply: use the 6-CT scheme — three CTs on the grid and three on the existing solar inverter.

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Wrong-CT symptoms

Use these symptoms to diagnose a CT problem on site:
SymptomLikely cause
E106 fault on LCDCT abnormal — check connection and conductor selection
E107 fault on LCDCT reversed — flip the CT arrow direction
Load reading 0 WCT clamped around L and N together
Import/export signs flipped or battery discharging to gridCT reversed or on the wrong conductor
Witness test at commissioning: with grid on and PV off, the display must show import. Then energise a heavy load and confirm the sign and magnitude change correctly. 📷

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Common mistakes

  • CT clamped on a sub-circuit branch “because the main cable was hard to reach” — the control logic goes blind to everything outside that branch.
  • CT ratio typed from memory instead of the CT nameplate. [KNB-VAL-08]
  • Meter RS485 A and B swapped — meter comm fault, no grid data on the display.
  • CT lead extended with random cable — keep the run within the supplied lead’s design length.

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When to escalate

Escalate to Kent New Energy service only — through your registered Kent partner channel or the Kent service desk details on your work order. Do not contact any third-party or component-manufacturer support line for a Kent-branded system: tickets outside the Kent channel are not tracked, not covered, and can void warranty handling.