The symptom map
| What you see on the display | What it means | Fix |
|---|---|---|
| Import/export signs flipped; battery discharging to the grid | CT reversed, or on the wrong conductor | Fix physically per Direction & Location; re-run the live test |
| Load reads 0 W with loads clearly running | CT clamped around both live and neutral — magnetic fields cancel | Re-clamp on the live conductor only |
| Power wrong by a large factor (e.g. 10× or ÷10) | CT ratio setting does not match the clamp | Read the ratio from the shipped CT nameplate and set exactly that value |
| Fast, continuous power fluctuation with steady loads | CT direction wrong — the control loop is chasing itself | Verify arrow toward grid; run the live test to confirm |
| One phase imports while another discharges simultaneously | CT-to-phase mismatch on a three-phase installation | Re-map per Meter & Phase Matching |
| Phantom import or export, noisy small readings with no load changes | Extended or damaged CT lead picking up noise | Restore the design-length lead; do not extend CT leads |
| Export logic not responding; grid figures frozen | CT lead open-circuit or RJ45/terminal connection unseated | Continuity check and reseat per the platform CT page |
| SOC frozen on the inverter display | Not a CT fault — comm link is down | Go to Cable Checks |
What the display tells you by platform
The platforms signal CT trouble differently. Read your platform’s indicator first: Kent M1: the LCD raises specific fault codes for CT problems.| Code | Meaning | Starting action |
|---|---|---|
| E106 | Meter or CT abnormal | Check direction, phase mapping, and cable continuity |
| E107 | Meter or CT reverse connection | Check CT wiring direction |
| E105 | Anti-backflow breach | Often CT-rooted — check CT before export settings |
The fix order — physical, then settings, then re-test
Work this sequence in order. Skipping ahead wastes time.Location
Confirm the CT is at the grid connection point on the live conductor only. Nothing else is the correct position.
Phase mapping (Kent G3)
Confirm CT, conductor, and terminal leads all match on each phase — L1 with L1, L2 with L2, L3 with L3.
Software orientation — only now
If a software setting needs updating to reflect the corrected physical install, set it now: M1 Meter CT orientation, G3 Forward / Reversal. Only set these to describe the physical truth — never to paper over a physical error.
Re-run the Energy-Flow Test
A CT fix without the live test is a guess. Run all three tests in Energy-Flow Test and record the results.
Common mistakes
'Fixing' a reversed clamp with the Reversal setting instead of re-clamping
'Fixing' a reversed clamp with the Reversal setting instead of re-clamping
If the CT is accessible, re-clamp it. The software setting is a last resort for a CT that genuinely cannot be reached — not a shortcut.
Hunting settings for an hour when load reads 0 W
Hunting settings for an hour when load reads 0 W
Zero-watt load with loads clearly running is always a live-and-neutral clamp. It has no settings fix. Re-clamp on the live conductor only.
Declaring the CT fine because the sign looks right at noon
Declaring the CT fine because the sign looks right at noon
With PV generating, solar output can mask import and make a reversed CT look correct. Test condition is always grid ON, PV OFF.
Blaming the battery for 'discharging to grid at night'
Blaming the battery for 'discharging to grid at night'
A flipped CT sign makes the control loop drive the battery to compensate for a false export reading. The battery is obeying the control — the CT is the fault.