Charging Golf Cart in Storage

[trigger1937]

Hio everyone. A friend of mine has two golf carts. One in Palm Desert and one in the Sierra foothills. He spends 5+ months of the year in the desert and the rest of the time in the foothills. The problem is he is always leaving some golf cart alone for 5 months at a time. In the desert, the 7 summer months the cart will be in daytime heat of 110-120 degrees and in the winter the golf cart in the Seirras will go down to 10-20 at night.

The question is,..What is the best way to charge the batteries either once per week or twice per month during the time they are not in use. I know that when they sit unused and discharge the sulfate accumulates and eventrually ruins the batteries. So what is the best way to keep them charged up. It seems we could set some kind of timers to turn the Club Car charger on at least once every two weeks.