I installed a 787 c2i on the console of my boat and have it wired to my starting batter. After running it for a while, when I turn my key to start my boat I get a "low voltage" prompt on the screen. The Unit still seems to be working fine and my boat is starting without any problem. (The starting battery is new and was charged before each outing). When I start the boat and check the voltage the graph is reading over 14 volts.

Anybody have a suggestion on the problem.