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Symptom: a comm alarm on the display, missing SOC, frozen meter data, or parallel units that stopped talking.

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Check first

  1. Which link? Battery (SOC/BMS), meter (grid data), or parallel bus — the alarm string names it; fix one link at a time.
  2. Kent battery link down? Crossover cable first. A straight RJ45 on this pairing is a guaranteed comm failure — verify the labelled cable before any settings work.
  3. Connectors seated, correct port? Click-home RJ45s at both ends, on the port the platform page names — before deeper diagnosis.
Datalogger stick “offline” is not a display comm fault. The stick is fitted physically per the installation pages and is activated with Kent Central Command — documentation to follow. Nothing in commissioning or troubleshooting here depends on it.
After restoring a battery link, close with the full-charge SOC verification from SOC Mismatch — the drift accumulated offline doesn’t clear itself.

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Escalate when

  • BMS silent after cable and selection are verified — battery-level case for Kent service.
  • A meter is dead with wiring, selection and supply verified — replacement case.
  • Parallel sync fails on a verified cabling/DIP/address setup.