Dears, this is my current, well running setup:
EasySolar 5kW + 48V 10KW Lithium Battery (Winston-cells) + 480W Solar Panels
Installed in a cabin, 2000m elevation in the alps -> So its a "island system" with no access to a grid
The cabin is protected against lightning impacts with a lightning rod. Unfortunately, the resistance is a little high with about 100 Ohm.
The EasySolar ground is connected to the lightning rod in order to be grounded.
I worry a little bit, that a lightning impact might damage the electronics, due to the high resistance in to the ground. I have installed fuses to protect everything as good as possible. Only the battery negative pole is directly connected to the EasySolar.
Question 1: Should I install a fuse on the negative pole of the battery as well? Because in case of a impact, the lightning would go into the rod and therefore directly to the earth connector of the EasySolar and then through the negative pole into the battery (if the resistance is lower than 100 Ohm).
Question 2: Would it make more sense, to unhook the system from the lightning rod and give it its own grounding? -> In case of a impact (in to the rod), the only connection would be through the solar panels which have a decent fuse.
Many thanks for your advise!