Originally Posted by kurtsimon
I called Hitching Post. They have something called Battery Brain Gold that mounts in the positive battery lead and disconnects it if you push a button or if the voltage gets below a certain value. $153. Looks a lot smaller than other approaches.
RV Supplies Online Store - Hitching Post of Ocala
(Look under RV supplies and search for battery brain)
I talked to Watson's Street Works, who has several battery disconnects. He recommended I get a manual disconnect from Napa. That's the cheapest solution. He also said he's been having problems with the solenoid approach. The Roadmaster disconnect appears to have voltage appied continuously when it's activated, causing heat. I'm going down to Napa to see what they have.
I have been thinking about the disconnect switch and have some ideas.
The first question I have is why the step 17 requirement to disconnect the “negative” cable rather then the positive cable? I think the reason for this is that it is the same procedure you would use to physically disconnect the battery cables if you were changing out the battery. If you incorrectly attempted to remove the positive cable first and if for any reason your wrench went to ground while removing the positive cable you would create sparks which might be the ignition source for a battery explosion. Having experienced one of these explosions in my youth I can testify it’s scary and dangerous. I was lucky and not injured. So to avoid the risk of sparks the grounded battery cable is removed first.
But if a disconnect switch is used to disconnect the positive cable and the disconnect switch is located in the engine compartment in the vicinity of where the “jump the battery” positive post is located the following advantages will be gained each time the Toad is connected and unconnected.
- The hassle of having to reposition the seat into the up position if it is in the stowed position and the junk that was stored on top of the seat.
- The hassle of having to move the seat and possibly the junk in the seat well and the junk in the seat.
- The hassle of having to move the floor mats and then the carpet to open and close the battery hatch each time the vehicle is towed and disconnected.
- Makes it more convenient if you just needed power on the car for a minute or so between tows.
- It is safer because no battery cable needs to be secured from drifting.
- By mounting a disconnect switch that has a remote on/off capability then the engine hood does not have to be opened to turn the battery on or off.
- No messing with the battery in stormy weather.
- Less physical work which translates as a more enjoyable trip.
During the planning stage I would also check to be sure that nothing else is being powered prior to where the disconnect switch is being installed so that the disconnect switch does a complete battery disconnect as required by the manual. Steve