Quote Originally Posted by SeaRay View Post
None of the associated items such as aerator, lights, bilge pump have caused me problems with interference. I also have never run down the start battery by running two DFs for 6 hours solid along with my aerator cycling on and off. They are not a big power drain. I use the 27 series marine starting battery and I've never had a problem with power drain. I've had similar results with Interstate and Walmart marine batteries. I keep a set of jumper cables in the boat but I have never needed them.
(Probably go home today and have a dead battery since I said that.)
I'm in the same boat except I run a 31 series battery for a starting battery. My motor is a 140hp. I've run two fish finders, my cycling aerator, bilge on and off, and nav lights for a little over 7 hours one morning without starting the motor to charge the battery. I do use a cabelas AGM 31 series as my cranking battery. I use the same two batteries for my 24 v trolling motor setup without issues.