Dave, It is a 12 volt system. The red switch lets you run on battery #1 or #2 or both together. Both Batteries running together will be useful for using both front and rear trolling motors at the same time. Like for hauling heavy loads when in work mode. Most of the time one battery will be in use with the second on reserve.
The barge needs a lot of juice for all the potential electronics I can run at any given time. You know me and electronic gear, Sonar, GPS, TV, Radio, Computer, Cell Phone!
Some may ask why would you want your computer and cell phone with you when fishing. I say, why would you work in your office inside a building when you can work outside on the pond and do a little fishing at the same time!
