Check first
- Is SOC live and updating on the display? A missing, stuck, or 0% SOC reading means a BMS comm problem. The crossover cable check comes before any settings work — this is the leading cause.
- Is charging actually scheduled right now? Check the mode and the TOU window on the platform’s settings page. A battery told to idle until a future window opens is obeying, not failing.
- What does the display flag? Note the exact alarm message and the SOC/voltage pair together — both matter for the triage below.
Causes
| Cause | How to confirm | Fix |
|---|---|---|
| BMS comms down | SOC missing, stuck, or 0%; Kent G3: CAN Fail · Kent M1: E400–E402 | Follow the Comm Fault flow — cable and connector checks first |
| Wrong battery selection | Kent G3: BatName-FAIL · model shown on display ≠ Pylon-family entry | Correct the battery selection per the platform commissioning page; cable must be proven first |
| Grid-charge not enabled | Kent M1: grid-charge is OFF by default · Kent G3: Allow grid charging OFF or grid-charge current set to 0 A | Enable grid-charge deliberately per the platform settings page and set the charge current |
| Battery already at target SOC | SOC at 100% or at the mode’s charge target; Kent M1: E406 / OV-Vbatt class | Nothing to fix — verify the figure against the mode’s configured target |
| Charge current capped by the battery bank | Charge holds steady at (pack count × per-pack limit) with no fault | Design behaviour — see Not Charging / Not Discharging; add packs or match the inverter charge current to the bank limit |
| Pack in temperature protection | Kent M1: E409 / E410; measured ambient extreme | Wait for temperature to normalise; review the siting if heat is the driver |
| Pack dormant after deep discharge | Pack voltage very low; pack unresponsive to normal charge | Wake using the platform’s official function: Kent G3 Battery Wakeup switch (use the switch only, never key in voltages manually) · Kent M1 Activate Bat; pack still silent → battery-service case |
After any comm repair in this flow, complete the full-charge SOC verification from SOC Mismatch. Drift accumulated while the BMS link was down does not clear itself.
Escalate when
- The BMS stays silent after the cable is verified against the pin card and the battery selection is confirmed correct — this is a battery-level case for Kent service.
- E400/E403-class faults survive the one-restart rule.
- A pack refuses the official wake procedure.
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.