Check first
Before opening the causes table, confirm these three things:- Was the power sequence correct? Both platforms power ON AC first — grid breaker before PV DC before battery. A battery-first habit from other inverter brands stalls the boot here.
- Is grid actually present at the inverter’s AC terminals? Measure with a meter at the terminals themselves — an upstream MCB tripped, a loose termination, or a dead phase kills the boot before any menu is reachable.
- What exactly does the display say? Note the precise message or code before touching anything. It determines which row of the table below applies.
Causes
| Cause | How to confirm | Fix |
|---|---|---|
| No AC supply reaching the unit | Kent M1 shows E100 (No AC Connection) · Kent G3 shows NO-Grid · meter at terminals confirms zero voltage | Restore the AC path: check the upstream breaker, terminations, and cable continuity |
| Wrong power-up order | Recall the switch sequence; check states of the three isolators | Power fully OFF (battery first, then correct order down), then restart in the official ON sequence from the platform commissioning page |
| PV string fault preventing boot | Kent M1: E300 (PV overvoltage) / E301 (string reverse polarity) / E305 (PV isolation low) · Kent G3: OV-DC / PV ISO-PRO class | String Voc and polarity check per the platform PV page; isolate the faulted string; E305/ISO-PRO on a rainy morning points to wet connectors |
| Battery absent, asleep, or undervoltage | Kent G3: No-Battery / UN-Vbatt · Kent M1: E407 (battery undervoltage); pack indication dark | Check battery breaker and switch states; wake the pack per Battery Not Charging; verify voltage at the battery connector |
| AFCI arc-detection event | Kent M1: E303 (AFCI) · Kent G3: AFCI-Check / ARC-FAULT | M1: E303 auto-recovers (clears after 5 events/day) — check the AFCI CT connection if it repeats · G3: one restart, then escalate if it returns |
| Internal fault at boot | Kent M1: E600–E602 · Kent G3: INI-FAULT / DSP-B-FAULT persisting after one restart | Stop — this is a Kent service case. Do not restart again; collect the evidence pack and escalate |
The one-restart rule. When you see a fault message: power off in the correct order, wait 5 minutes, restart once. If the same fault returns, collect the evidence and escalate. Repeated power-cycling destroys the diagnostic trail and fixes nothing.
Escalate when
- Any internal-fault code (E600–E602 on M1; INI-FAULT / DSP-B-FAULT on G3) survives the one restart.
- The display stays dark with verified AC voltage at the terminals — do not open covers beyond the wiring compartment; that is service territory.
- A boot fault follows physical damage, water entry, or a burnt smell. If battery packs are involved, isolate if safe and stand down per Battery Safety.
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.