Hi there one more update for rose
For the grounding rod talk first to a electrician because the dept is depending on your soil water conditions.
Maybe you need three installed or you can use your well.
In my case the house grounding is installed below the basement footing 5 meter below soil ( +/- 16 feet). and i am having other rods around the wind generator tower ( two hits by lightning in 6 months ).
Keep grounding separated from lightning protection ( i wash disconnecting the wind gen by the first hit, and it sparked out the arrestors/ spark caps )
and if you are free from the grid keep your ground floating not connected to the generator ( for same reason there is always a leak eating your metal).
Greetings from greece