Skip to main content
Your goal is to determine whether the inverter’s grid protection is responding to a real grid issue or to a problem in the connection between the grid and the inverter’s terminals. Symptom: grid-class alarms appear — over/under-voltage, over/under-frequency, or no-grid — either once in a storm or every afternoon like clockwork.
Grid protection points are not a tuning knob. They move only with utility consent and Kent instruction — never to silence a nuisance trip. On the Kent G3, protection levels load automatically from the selected grid code; do not hand-edit individual protection values.

​
Check first

  1. Occasional or chronic? A one-off alarm during a known grid disturbance self-clears by design — no action needed. A daily or hourly pattern requires measurement data before any action.
  2. Measure at the inverter’s AC terminals across the problem window — the terminal voltage, not the DB board voltage, is what the inverter sees. One hour of readings across the problem period tells you far more than a single spot measurement.
  3. Terminations tight? Loose or undersized AC terminations mimic an out-of-band grid at every load step. Check these before concluding the grid is the problem.

​
Causes

CauseHow to confirmFix
Genuine grid excursion (transient)Alarm self-clears; terminal voltage is normal when measuredNone needed — the inverter reconnects automatically when the grid returns to the acceptable range
Chronically out-of-band gridLogged terminal readings are out of the code’s window at peak hoursDISCOM case: Kent compiles the evidence and leads the utility-consent process; do not adjust protection values unilaterally
Loose or undersized AC connectionVoltage sags at the inverter terminals under load steps; heat marks at terminationsRe-terminate and torque per the platform AC wiring page; re-measure across a full day
Wrong grid code selectedCommissioning record vs the Kent parameter sheet for the site’s DISCOMSet the grid code from the Kent parameter sheet only
No grid detectedKent M1: E100 · Kent G3: NO-Grid; upstream breaker off or phase deadRestore the AC path — follow Not Starting
Unbalanced or distorted grid (Kent G3 only)G-PHASE / GRID-INTF02 class alarms appear alongside measurementsConfirm the grid quality and the AC cable run; one restart; if persistent, escalate
Alarm names differ between platforms. Kent M1 uses E101 (grid voltage) / E102 (grid frequency) / E108 (other grid abnormalities). Kent G3 uses the OV-G-V / UN-G-V / OV-G-F / UN-G-F alarm families. The triage is the same — record the exact alarm string, letter-for-letter, before doing anything else.
Pending Kent validation — do not configure in the field. [KNB-VAL-01] The India grid-code parameter set for both platforms — voltage and frequency windows, reconnect timing, power factor — is under confirmation. Until published here: set the grid code only from the Kent-issued parameter sheet for the site’s DISCOM. Never improvise protection values.

​
Escalate when

  • The grid is chronically out of band on logged terminal measurements — Kent leads the DISCOM process; bring the readings, timestamps, and photos.
  • Grid alarms persist on a site with a verified-healthy grid and tight terminations — this is a service case.
  • Any request arrives to “just widen the limits” — that path runs through utility consent and Kent, or it does not happen.
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.