Deye F24 fault: DC insulation impedance failure
Call a qualified installer
Urgency: high
What it means
The insulation resistance on the solar panel side is too low. It often shows up after rain, but it means moisture or damaged insulation is letting current leak – an installer must test it.
Likely causes
- Moisture in panel connectors after rain
- Damaged panel or connector insulation
- Panel frame earthing fault
Don't try to fix this yourself
When to call a pro
Call a qualified installer now. Switch off heavy loads and don't try to repair anything yourself.
Solar systems carry dangerous voltages. Only do the safe checks listed. If unsure, call a pro.