Charger faults every time it rains
Why it happens here
Exterior conduit runs in Springhead often take on water because the fittings were not sealed or the charger was mounted too low. When moisture reaches the terminals, the GFCI breaker trips. It is worse during the summer storm season when rain bands move through quickly.
Our approach
We mount exterior chargers at least 18 inches above grade, seal every conduit penetration, and use NEMA 4 rated enclosures. If we find a wet conduit on a repair call, we replace the fittings and dry out the run before re-energizing.