DC to DC
Sometimes it is necessary to have a DC to DC charger allowing you to pull power from a primary battery bank that is charged by an alternator. The most common scenario for this type of charging is in the marine industry where a waterproof charger is even more ideal. Example: When you are out on a large lake leaving your favorite fishing spot to scout out another location this type of marine charging system will allow you to charge your trolling motor batteries while on the move. It eliminates the need to cut your trip short or head into shore to charge for a few hours before heading back out.
The DC to DC charger option is obviously only viable during periods of travel while the primary motor is running. Some people like to use large portable solar panels to help extend their time on the water. The key in this scenario is to have a large enough panel to provide a noticeable difference and for it to be a sunny day! The advantage of these marine charging systems is that you can be adding power to your trolling batteries all day long, not just while the primary motor is running. A 75W CIGS solar panel will provide about 4600mA (4.6A) vs. 10A for Pro Charging Systems CS1 charger.RIGHT_SIDEBAR_CONTENT
How do you know if your require a 1 Bank vs. 2 Bank charger?
It comes down to the number of batteries you have and whether or not your system is a stand alone, parallel or series connection. The single bank CS1 by Dual Pro is your choice for any 12V trolling motor using one marine battery. The two bank CS2 waterproof charger is ideal for 24V systems. There are two independent leads, each with a dedicated max 10A that would be connected to the terminals of each battery.