Before I decide on the best route for my dual battery setup would be, i wanted to bring the idea of dual alternators for discussion. Mainly what I am trying to achieve is the following: Seperate the OEM electronics from the added Accessories Dont want to make any changes to OEM electronics schema Retain factory functionality Be able to run all accessories on second battery and be able to drain battery and be able to start vehicle from main battery Be able to jump the main battery in case of discharge with jumper cables In the event the main alternator goes, be able to charge main battery with second alternator While camping I like to have the radio on, and I plan on having a nice audio setup with amp and subwoofer. One of my concerns is since I dont want to make any changes, will the headunit draw enough power to eventually drain the main battery. All AMP's will be powered from second battery. Assume both batteries are Optima Yellow tops. In case of a Main battery drain, how could I from the cabin jump start the battery? I dont want to use jumper cables. Is there a way to charge the main battery from the second alternator, in the event the main ALT craps out, without unhooking and moving anything, a complete High availability redundant alternator system at the flick of a switch? Is this even possible? I think the benefits are interesting, if you could have a fully redundant charging system. Any ideas?