I was
needing to isolate the dual batteries in the rig and went down the traditional
battery isolator route. I first
installed the 90 Amp isolator the correct way as shown below.
The problem that I found is the
isolator has a constant voltage loss of 1 Volt per side and I was not happy with
the charging and running voltage. I was
thinking about changing to a Hellroaring isolator, which would do a much better
job, but I decided to try a different wiring arrangement, which I think should
work fine.
With this arrangement, the main
battery and electric get a full and direct charge. The starting battery sees only 0.5 Volt drop
and can accept 180 Amps charging safely and is protected from discharge if the
main system is drained down such as when winching.
Updated 2008/06/10