I've put quite a bit of thought into this.... I believe I'm going to operate with one on/off switch between engine and starting battery and one off/1/2/both switch between everything else on the boat, the deep cycle, and starting battery with an acr between the batts..... the starting battery will ALWAYS be connected to the engine and trim unit except when stored... the multi switch will generally be switched to position 1 and run EVERYTHING except the engine and trim pump from the deep cycle but by switching it to both I can double up to start the engine from the deep cycle or by switching to position 2 I can run accys off of the start battery for whatever reason
The beauty of this setup is that I don't have to remember to switch anything and thus I can't accidentally run down both batteries while on the hook and the batts charge automatically. I'm also going to install an on board charger.
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