I have a golf cart at my RV site, and I will be leaving for Florida after the rv is winterized. The cart is 48 Volt, and will be unattended for 5 months, it will be in a shed, I am going to buy a battery maintainer and use it on the batteries. I it will be in the state of PA, which gets pretty cold. This i the first year trying this, anybody have any suggestions Pro/Con, thanks