[gonzy]

My 2006 club car manual recommends leaving the charger running during storage. I did this last year for 5 months with no problems. The reason for this is that lead acid batteries deteriorate (due to sulfation) if allowed to discharge. My charger is plugged in to a ground fault circuit which would offer some protection from lightening but I doubt it would survive a direct hit. We had a lengthy discussion on sulfation in another thread last year or if interested google battery sulfation. Never heard of 64v systems is this something new or did you mean 48v system?