Nuisance tripping of residual current circuit breaker during lightining

Spikes n the system due to nearby lightning strikes will trip the units.

You would need to install a good industrial surge diverter if you want to stop the nuisence trips

You could use a large diode bank, say up to 1,000 or 10,000 volts, in series with your ground. This would prevent any reverse surges while allowing any amount of electricity over .7 volts to still make it to ground with very little resistance.

Don't quote me here, just a theory.