Re: How to connect two trolling batteries together.
I have the same setup although at I only have a dual bank charger as I wasn't thinking clear when I purchased it a year ago. I added a blue sea battery switch. This allows you to switch between bat1 bat2 both or off. I put inline breakers in front of each battery. The switch requires just 3 leads bat1 pos bat2 pos and the switched output, which you just connect to your trolling motor connection. As for your charger you would connect direct to the batteries. Connect out1 to batt1 pos and neg, then do the same for bat2 and bat3. Now bat1 and bat2 will have to have a jumper connected across both the neg terminals rated or sized to what you have already. This may seem strange as the the neg leads from the battery charger could be connected to one of the two but I wouldn't. So in short you will have 2 neg connections to one of the batteries, 3 neg connections to the other battery. The extra connecton is the system ground of the trolling motor. Use the battery switch to select 1 or 2. I personlly do not use both as if you have one battery going bad it will take the other one with it "as previously stated by the above post". When charging select off to disconnect the trolling motor, this way you do not have to unplug it as charging batteries with the trolling motor connected can in some cases damage the trolling motor. If you do not connect the 3 output to your starting battery make sure you connect it to one of the deep cycle batteries. I beleive the XPS is similar to the mariner pro and uses distributive charging. That is you have 15 amps total, so as one battery is returning to 100% the avalible current will be used on the other outputs. I hope I didn't confuse you. Good luck<br /><br />SingleShot
