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With the 2 12 VDC battery setup, the essential bus could be fed from 24
volts or either of the 12 VDC batteries with the proper switching and
isolation
question for the math wiz's:
how much does your total MTBF improve when you go from 2 power subsystems
to 3?
e.g. suppose the MTBF of a battery in the first two years of its life is 1
per 10,000 hours
Then, assuming for a moment that switches and contactors don't count, the
alternator MTBF is a don't care because it's way higher than the battery.
So you have two batteries, now you are talking at 1/(10,000 * 10,000)
failure rate.
Is that good enough?
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