part of our decision process we had to firstly choose what type of winch set up
we wanted. We explored all the main brands including Superwinch Warn etc and
also hydraulic versus electric. In the end we chose to go for a Warn
24 volt 8274-50 high mount winch. Why the 24 volt version? Simple! They have
a faster line speed of 7.9 feet per minute [assuming a full 8000 pound pull]
compared to 6.1 feet for the 12 volt version and the current drain at this level
was only 273 amps compared to 450 amps.
we had decided on a winch but since the Discovery operates on 12 volt and not 24
volt how the hell would we power it?
There were many options to consider. In the end we found an article written by the Roscommon Equipment center from 1971 which talked about using 24 volt military vehicles for civilian use. The link is http://www.roscommonequipmentcenter.com/projects/rec2.pdf . This offered the solution using a 12 / 24 volt series parallel switch set up. We just run it in reverse to the solution presented in the article. Ok not perfect but good enough for our purposes. To affect this set up we purchased a remanufactured Cummins Diesel Solenoid. We went for a remanufactured one at a cost of $206 compared to a new one of almost $650.
a switch mounted inside the cabin we can now switch the series parallel switch
to allow for 24 volts feeding form both batteries and hence powering the winch.
When not winching the switch is set to 12 volts and both batteries charge
normally and all accessories work off the main battery.
of the rules for the OBC is to have a battery disconnect or kills switch
connected. To achieve this we purchased a Painless
Brand Performance Remote Master Disconnect Kit from Summit Racing [part
PRF-30205]. It was an easy install following the instructions and interrupting
the positive feed to the engine and accessories from the positive of the main
battery. Unfortunately the first one that turned up was defective however
We are using dual Optima Yellow top batteries.