What you will see
- Inverter will not start after rain
- F18 in SEMS
- F155 while running
Why it happens
Water in connectors, cracked cables, rodent damage or battery cable damage lower insulation.
Diagram
Damp morning, weak insulation
Dry day
PV and battery cablesWell insulated
→InverterStarts
After rain
Wet connector or damaged cableLeaks to earth
→InverterF18
If F18 stays on dry days, there is damage to find.
What you can check yourself
- Note whether it only happens in wet weather
- Look for visible cable damage safely
What not to do
- Do not unplug connectors
- Do not ask for the threshold to be lowered to hide damage
When to call us
- Insulation test PV and battery circuits
- Check PE wire
- Repair damage
Monsoon and fog
F18 rises across Punjab in the monsoon. We test each string and battery cable to find the cause.
Send us
alarm screenshots with times and weather