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[sbechtold]

mojodog7 previously said:

I agree with everyone - well written, informative and detailed post. I especially appreciate the included photos. The question I have is: how does this aux battery get recharged? I didn't see how it would/could connect to the alternator, and I would think with all the accessories, and especially the power that I imagine the winch would draw when in use, would run this second battery down pretty quick. Am I off base about the power draw of these accessories, or just of the capacity of the battery?

The STARTING and AUX batteries are connected to a 250amp solenoid that is connected to the alternator. Both batteries are charged, at the same time, when you have the system in switch position 1 or 2. The batteries are isolated from one another in position 1, so that the drained AUX battery does not draw current from the good battery. Part of the reason for doing this project is to allow my electrical accessories to draw from the AUX battery while maintaining a good charge in the STARTING battery. The AUX battery will recharge once the vehicle is running. Make sense?