Bob, Tim, Christoph, and Frans...thank you for your thoughtful and detailed
responses
to my question.
I should have given more detail w/ my question...my engine is a 140 hp MPEFI
engine
by RAM Performance which is based on the Subaru...I have been using Fig.
Z-19 from Bob Nuckolls' AeroElectric Connection, an electrical layout intended
for a "Dual Battery, Single Alternator, Electronic Controlled Fuel Injection
Engine", as a guide. Following it will build in the redundancy which Frans
speaks
of except for the single alternator...a shortcoming to be compensated for
by using higher Amp/hr batteries which will be swapped out annually or
bi-annually
as Frans suggests.
Additional built-in redundancy derives from dual fuel pumps, back up battery for
my EFIS, back up, independent GPS, and duplicate circuitry in the ECU.
In my case, for weight and balance considerations, my batteries will be aft, and
at this stage of the game, it appears that lightweight batteries would not
necessarily
be beneficial.
...onward...
Fred
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