Hi guys. I am starting my new off grid solar setup and wanting to discuss safety with respect to DC grounding the array and MPPT.
I am using all Victron MPPT and separate inverter. I understand the requirements for DC grounding but within the USA there is a requirement for a ground fault fuse on the DC ground loop within the inverter.
Now I do not believe Victron has this built in as it will have to disconnect inputs and outputs if a current was detected on the DC ground loop.
So, I am wondering if its something I will install. I am not in USA so not needing to worry about the regulations there, but I do see a good reason for this GFP fuse as we do the same on out DC systems at work, disconnect ground if there is a DC current detected on the ground.
I was thinking a 1A DC MCB would be good but if a fault occurred, I would need to find a way to disconnect the PV from the MPPT. I could use a DC current detector and use a contactor to disconnect if greater than 1A was present.
This seems to be a good protection against a DC ground fault which could potentially cause a solar overheat and fire
What do you think, diagram of the US system attached
