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hi everyone
jeff cote here with votingtechtalk.com
we've got a question from a fellow
boater
named john john asks jeff i've got two
engines
each with an alternator makes sense and
each with its own dedicated starting
battery
again makes sense check
for a maximum starter battery redundancy
and maximum house battery charge rate i
would like
each alternator to be able to charge
both engine batteries
as well as the house battery okay
so in this instance uh let's recap a
little bit of the question because it
goes further
we've got two engines with their own
alternators
each engine has its own engine battery
of course and a house battery so there
are three battery banks on this boat
and this is where it gets interesting
because remember the word that's being
used over and over again here by john is
redundancy i like it all right let's
keep going
john then says can i use a 3
output battery isolator and in case
you're wondering what a battery isolator
is a battery isolator is a device
where you can have input and you can
have three outputs and the three outputs
don't see each other
so they're actually isolated that's why
it's called a battery isolator
and so you can have an alternate input
and go to three places
okay so far so good and he says can i
use that three output battery isolator
on both alternators and connect the
output so that both
starter batteries and house batteries
have complete redundancy meaning that
each alternator on each engine not only
recharges
at its own engine battery and the house
battery which is pretty common
but the third output would also recharge
the other engine's battery meaning
that you could be underway with one
engine and have that engine recharge
three battery banks underway
can you do that that's the question john
asking
and the answer is absolutely we do this
all the time
because a lot of us want to have either
engine because many boats have two
engines not
all of us but some boats have two
engines we want to have two engines
dedicated alternators and we have one
house bank and some of us might run
an engine on starboard right and the
other one on port
they might run both my only run one and
they want
either engine on either alternator
to be able to recharge the house battery
so yes
you can absolutely have more than
one battery isolator connected to one
battery
so ie you could have two battery
isolators in this instance connected to
the same batteries
and that would totally work so that's a
great question john and it's actually
pretty common
that's part of our tool kit and we do
this all the time so great idea
you're going a little geeking out with
the complete redundancy but you know
what the difference between a one to two
output battery isolator
and the difference between that and a
one to three is negligible
so why not have full redundancy make
sense i like the thinking
good one thanks for asking and thanks
for everyone for watching
thank you for watching this pys video if
you've got further questions please
ask them below or send us an email via
the contact forms on our website
and don't forget to subscribe
thanks again for watching
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