As I said earlier, I isolate both the pos. and neg. charger leads from the battery (when not plugged in) by use of a relay. Is this necessary, or recommended??? I did this based only on a gut feel that it would be preferable not to have the charger connected to the battery when not in use...that there may be a slight drain on battery, or possible damage to charger, or something like that. Is that the case, or is the relay totally unnecessary.

Thanks,

Mark

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1984 300TD Wagon, 407,800 mi (current daily driver)
1985 300DT Sedan, 330,000 mi (gone to that great autobahn in the sky)