Leaving the front battery is a 2/0 cable that is controlled by a Cole Hersee constant/heavy duty solenoid, which continues to the rear Deep Cycle battery. All cable ends are fitted with crimp terminals and adhesive sealed shrink tube. Solenoid can be switched on, off or with ignition. This allows for chillin all day listening to the tunes or showing a slide show at a car/truck show without affecting your starting/engine battery. The standard position is on with the ignition, allowing for charging of rear battery while engine is running. If rear battery is depleted, solenoid can be turned off for engine starting without putting a drain on the system. If front battery gets drained or has a problem the solenoid can be turned on for engine starting and/or power. After building a tray that would hold my Deep Cycle battery (with evaporation oil additive to cut down on out-gassing) from General Power and my ViAir pump, I mounted it to the floor with 1/4"X20 Rivnuts and tapered head machine screws. Predrilled holes in the tray will allow for a HD hold down strap to keep that juice in place during those bouncy rides.

 

I understand why you put the extra battery, sounds like a great idea. But the air pump is for lockers, trail air, etc?

 

Air bags, lockers and refilling tires after crawling.

 

I always like it when someone does nice & clean work. It looks great! Very well done.

 

Nice job!!