Hello, Here is the setup I use with great success. I used it with my
last 13' Trillium
keeping the battery charged up and allowing the
to run on 12 VDC while traveling. With the isolator
there is no need to worry about disconnecting the trailer hookup
saving a fancy switch and some effort. When I stop for over an
hour I switch the refrig to propane
Sure Power Industries Multi Battery Isolator Model 9523A (95 Amp Max)
-- Note: The Model 9523A has an extra terminal "E" to use with GM vehicles.
-- A Model 952 would have sufficed for this application.
50AMP DC circuit breaker
# 6 wire - 30 feet (#6 instead of #8 for long run to rear of truck)
MISC: terminal lugs, heat shrink tubing, solder, etc.
The output of the alternator (RED) was disconnected and a New (RED) wire
run to the isolator input terminal A.
Isolator # 1 connection to (BLACK) wire that was hooked to the wire originally on
Alternator output going to vehicle battery.
Isolator #2 output goes to a 50 AMP circuit breaker and then #6 wire (WHITE) back to
battery connection on the trailer receptical.
Also, a #6 Wire was run from the alternator case to the frame rail in the
engine compartment and off the frame rail to Ground on Trailer connector.
This helps ensure a low resistance path for the ground, too.
Hope this helps some fellow FRG owners. If anyone has any suggestions
to help improve this setup, please post as I am looking for a new tug and
want a similar setup on it. Larry H