Situation: I have an older 90 hp Yamaha, and a Honda 4 stroke 8 hp with pigtails. I run two Scotty electric downriggers, an Icom VHF, and a Lowrance fish finder/gps. I do a fishing trip to a remote area where the fishing is great and we are constantly using the riggers. The cabin that we rent in does not have power for recharging batteries. We will be out for a 5 days of fishing this summer, without access to shore power, and I don’t want dead batteries… like last summer Can someone tell me the best dual battery system / setup for keeping them charged up? I currently have everything running of my ONE starting battery. I want to add a deep cycle gel battery. I have a short run 10-15 minutes to the fishing grounds. The other thing is that I troll with the kicker, to save fuel, and I think that it puts out about 6-8amps in the pigtails. With that running into the deep cell, would it be enough to keep it charged up when using the riggers, fish finder, and VHF?
Any help would be appreciated. Tony