Where is your combiner located and how far from the charge controller? Where is your batter bank located?
I use Midnite Solars lightening arresters. I have one ( will be increased to two, one for the black - bar and one for the red + bar for maximum protection - as the panels are most vulnerable to strikes for me. ) 300v arrester in the combiner box and one 115v arrester at the battery group. All Dc grounds, as well as inverter ac loads ( classic, combiner box and panels) are on a single grounding rod at the corner of the building the panels are mounted on. All a/c loads from the grid are grounded at a single point at the entrance of the electrical panel. The House is grounded at it's service entrance as well. I will have two 300v midnite arresters protecting me from the grid just as soon as I get them installed.
Anyway, could you explain a bit more about your site wiring and load locations?
