RE: Advantages of a 24 volt system
You can always use (2) 12VDC batteries in series or any combination that gives 24VDC with the abilty to take a feed at the 12 volt mid point. Then run one feed to the 24VDC panel and the other feed to a 12VDC panel. You could have the best of both worlds if needed based on the battery AH rating.
I run mostly modern Garmin equipment and all of the new devices will run from 9VDC to 30VDC. I have never tested them below 10.5VDC or above 28.5VDC. Even their VHF100 through 300 radios accept a wide range of DC voltages.
Bill
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