Larry Michelon's Range Rover Dual Optima Battery & Battery Monitor Gauge Installation

Click here for John Purnell's installation...



I've had the dash apart and can comfortably say there is room behind the
upper dash [for adding gauges]. There is a little access panel under the rubber in the center
tray. Take a look. I picked the location next to the radio because it was
easy. I plan on changing the oil gauge to one with a built in LED warning
light (to get my attention). I'm thinking of putting a temp gauge to the
left of the binnacle to supplement the factory gauge.

Here is the installation of dual batteries and my E-meter gauge.

The shunt for the meter is located below the coolant reservoir on fender
well. The left lead on the shunt is a 2/0 wire from the battery that I
fabricated. On the right is the original battery lead (which I cut off and
installed a lug) and the lead to my winch. You can see all the ground wires
at the stock location just below the shunt.
I routed the wires along the existing wire loom on the top of the fender,
along the bulkhead and through an existing grommet in the bulkhead
(pictured). This comes out just below the A/C fans by the passengers feet.
>From there it runs just below the dash, into the fascia housing the radio
and to the gauge (pictured). The gauge to the left of the radio is an oil
pressure gauge. You can also see my CB location and the big rubber ball to
right is my computer mount.
On the drivers side you can see how I installed the second battery. The RR
seems to run fine without the air cleaner horn and it hasn't affected fuel consumption
(more important to me than upper end horsepower). The pictures show the
relocation of the vacuum pump (on the back of a bracket holding relays), the
bracket/location for the steering reservoir and the vacuum accumulator back
by the bulkhead on the fender well.
I have an email with pics if anybody wants it. Please email me and I will
send it off list. It has pictures of the battery monitor installation, as
well as my dual battery installation.
The monitor itself is great. It measures voltage (at the battery), amperage
in/out of the battery (up to 500 amps via a shunt), Ah used, percent of
battery capacity left, time remaining at present battery load and will
provide battery temp with an optional sensor. It also has an output for an
alarm, output to trip a relay (to turn loads off if battery is low) and
output to download info to a computer.
The shunt is installed in the negative lead, so the monitor can keep track
of everything that is coming and going from the battery.
The unit is popular with electric vehicles and motor homes. It is also
popular with boaters, which is how I came to know it (my job).





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