My Surepower Dual Battery Install (1 Viewer)

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Joined
Mar 29, 2003
Threads
39
Messages
220
Location
St. Louis Area
Greetings:

After extensive reading and searching on what would be the best dual battery system to meet my needs and future needs, I decided to go with the Surepower. This unit is a selenoid based system that automatically isolates the batteries when they are not being charged (engine off). It automatically combines both batteries for charging once the main (starting) battery has recharged to its full capacity (engine on). I have a manual switch to combine both batteries for jump starting a weak main battery or to conect both batteries with the engine off. This is a lighted switch that lets me know if I have it in the manual mode. This switch overrides the automatic functions.

As it was time for a new battery, I choose to get 2 identical Walmart Everstart Maxx's. As my accessory usage is light I felt a deep cycle would not be necessay. Also, the constant charging from the alternator I felt would shorten deep cycle's life. As there is a 3 year replacement warrenty, I felt is was worth a try.

I had to eliminate the silencer and use the Napa hose that was recommened in another thread for us 94' owners. I used Slees washer bottle relocation kit. Second battery tray and hardware from Cdan. Two gauge welding cable (very flexible and high grade). 150 amp fuse and holder from Hellroaring (thanks Beo) to fuse the long run from the main battery to the Surepower unit. All cable was cut to custom length, soldered lugs, heat shrinked, and protected with split loom. The long run between the radiator and condensor was further protected with 1/2" flexible conduit (the 2 gauge fits perfectly inside.) The dash switch was run through the firewall. Military style battery terminals were used. Auxillary battery was grounded to the chassie from an existing threaded nut welded to the frame.

For those of you considering the Surepower, I hope this answers some of your questions. All in all this has been one of the most satisfying mods to date.

Steve
94' 160,000
aux battery.jpg
primary battery.jpg
dashlight.jpg
 
Last edited:
Thanks Steve, I am going to copy yout post into the section of the FAQ for Dual Battery installs
 
Nice job Steve.

You and I both need to get some covers for the military terminals on the aux battery. I think about ordering them every time I see pics of another dual battery system. :D

-B-
 
Great Job! Please post your wiring diagram. I have been wanting to do this mod.
 

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