Earth grouding off-grid

[tonyg]

Hi,

I'm getting close to installing my off-grid system. There are only some wires and fuses left to purchase. Anyone with experience, please have a look and let me know if the grounding / earth schematics are safe.

Earth rod 1 is for lightning protection, while earth rod 2 is for general grounding of equipment.

Any other recommendations are gladly welcomed at this stage!

Thank you!

 

[tonyg]

I've been advised to combine all the earthing into one point, but this seems to be like an ongoing debate for a long time...

 

[BentleyJ]

Considering safety and function only, the grounding configuration as drawn will work and having 2 ground rods should not cause any problems. The issue that can arise with multiple grounding rods for different pieces of equipment in a system is circulating ground loop currents but in your case its only the solar panels on rod #1.
All of the solar panel installations I have seen tie the solar panel/mounting rail equipment grounding conductor to the ground bus in the main panel so everything is tied together.
In a case where there is a ground mount solar array that may be several hundred feet away I suppose it would be less expensive to drive a separate ground rod near the array rather than purchasing a spool of ground wire. In most situations the installer just runs the equipment ground in the same conduit with the other conductors all the way back to the panel.

 

[tonyg]

It would be possible to move earth rod#2 so that I bring the grounding of the PV to it as well, and then it'll be one ground point for the entire system.