I have a concerning situation with my off grid setup and getting shock from my RV chassis after a storm and heavy rain .
Overview:
a solar array feeds into a shed that houses the inverters, batteries , ac panel. I have a RV plugged into this building and after a heavy rain the RV started getting charged (shocked my dogs and the door lock was tingly to the tough). I'm getting 60 vac and 58vdc when testing earth ground to the frame of the RV. If I turn off the PV breaker in the building (day or night) then the issue goes away. This is a new issue and have been off grid with this setup for almost 2 years.
The setup:
The Array is 12k, each panel has the frame connected by 6awg ground which goes to the combiner box that goes to a ground rod.
The Combiner Box has 2 sets of PV wire are in conduit to the inverters located in a shed 90 feet away. (no grounding wire from the combiner box to inverter shed)
The shed has 2 growatt 5000 inverters that have PV breakers as well as battery breakers for the 48V eg4 battery bank
The 2 growatts feed their line 1, line 2, and ground to a "inverter combiner" panel that have 2 breakers one for each inverter which combines and feeds into a breaker on the AC panel
A midpoint transform also feeds into the AC panel.
The AC Panel in the shed has the neutral and ground bonded, there is a ground rod to the AC Panel ground bar
I have an 50amp RV panel on the exterior of the shed and the RV is park a few feet away over the buried PV lines.
I'm unsure if i should connect the Array ground to the inverter combiner panel ground or remove the bonded ground/neutral screw in the AC Panel?
Thanks in advance for advice
Overview:
a solar array feeds into a shed that houses the inverters, batteries , ac panel. I have a RV plugged into this building and after a heavy rain the RV started getting charged (shocked my dogs and the door lock was tingly to the tough). I'm getting 60 vac and 58vdc when testing earth ground to the frame of the RV. If I turn off the PV breaker in the building (day or night) then the issue goes away. This is a new issue and have been off grid with this setup for almost 2 years.
The setup:
The Array is 12k, each panel has the frame connected by 6awg ground which goes to the combiner box that goes to a ground rod.
The Combiner Box has 2 sets of PV wire are in conduit to the inverters located in a shed 90 feet away. (no grounding wire from the combiner box to inverter shed)
The shed has 2 growatt 5000 inverters that have PV breakers as well as battery breakers for the 48V eg4 battery bank
The 2 growatts feed their line 1, line 2, and ground to a "inverter combiner" panel that have 2 breakers one for each inverter which combines and feeds into a breaker on the AC panel
A midpoint transform also feeds into the AC panel.
The AC Panel in the shed has the neutral and ground bonded, there is a ground rod to the AC Panel ground bar
I have an 50amp RV panel on the exterior of the shed and the RV is park a few feet away over the buried PV lines.
I'm unsure if i should connect the Array ground to the inverter combiner panel ground or remove the bonded ground/neutral screw in the AC Panel?
Thanks in advance for advice