Check with Northern Tool. It is quite
possible that they sell a controller that can be added to the system.
Batteries that allow the addition of water can
stand more overcharging, but it still is not ideal. Another possibility is
to find or install a main switch to remove the batteries from the circuit when
the unit is stored for a long time.
Ed
Ed & Wendy Hauser 2994 Mittower
Road Victor, MT 59875
