Originally Posted by Walleye2487!
So will I not need a on board charger with with a combiner?
The folks that moor or dry stack their boats typically canít use shore power to charge their batteries. Everyone else should have an onboard battery charger. Maintaining batteries with a charger assures maximum performance and battery longevity.
A charger lead on each battery is ideal. However, with a combiner you can get by without a charger on every battery. For example if you have a charger connected to your trolling battery(s) the combiner will close when charging and charge your crank battery. Conversely, if you connect a charger on the crank battery, then a one bank charger will charge your trolling battery(s).
The big advantage of a combiner is the ability to charge your trolling battery on the water using the alternator on the main engine. This better assures your trolling batteries donít die on the water. Several years ago, I ran my rig daily for 10 consecutive days and later I learned my charger was fried by a lightning strike, and I didnít know it. The combiner provided sufficient charge to my trolling motor battery to keep it running every day without a shore charger. Not ideal, but that scenario demonstrates the impact of a combiner.