Read up on grounding tricks for lighting protection, but in the best grounding you can. Get the biggest surge suppressors you can afford and protect all AC outlets. Install gas-filled voltage suppressors on all outdoor wiring, make sure all the wiring is inside grounded metal conduit, Make sure all your inverters and converters are in metal boxes (or are built with metal cases) and ground everything. Read up on how transmitters and cell towers survive lighting. You can get to a 95% chance of surviving just about anything.