Morningstar GFPD is tripping intermittently at maximum solar exposure to PV array. GFPD won't trip if PV breaker is shut off to charger 150/70 PV input. Electrician finds no leakage to ground. My solar array is grounded and then bonded to system.
I noticed in manual this statement:
The charger must not be connected with grounded PV arrays. (one ground connection only).
Does this mean I should have a dedicated ground for the charger case?