Could somebody anwer this please

[Pete Masterson]

Your analysis is probably correct. The later WLs have no generator battery (it uses the house batteries or the house batteries and the engine batteries combined) and separate engine batteries.

My coach has 3 (type 35, I think) engine batteries and 6 type 4-D house batteries.

I don't see why you couldn't rewire your 12 volt systems to isolate the starter circuit from the house batteries -- then add some batteries to start the 8v92. (You'll need to do the math to figure out what's batteries are best for your engine, as I have the DD S-60.)

In the rewiring, you'll also need to consider how you'll charge the engine batteries while you're on shore power and while you're on the road. Ideally, having a separate 3-stage charger for the engine batteries might be best, but the OEM arrangement on my coach has me tie the engine batteries together with the coach batteries for shore power charging. This is managed by a Link 2000-R controller (that manages the dual inverter/chargers in my coach).

Over the road, the Link 2000-R controller also handle the output from the alternator, replacing (or overriding) the internal voltage regulator.

Pete Masterson

'95 Blue Bird Wanderlodge WBDA 42 (For Sale)

<http://www.aeonix.biz/BBforsale.html>

El Sobrante CA

"aeonix1@mac.com"

On Feb 22, 2009, at 9:02 PM, Dan Williams wrote:

Jon, The older coaches used the same batteries for starting and dry camping. That is really not a good idea because then you will be trying to start the coach with low voltage batteries after a night of dry camping and that is bad for the starter. Right now I have two 8D batteries plus a generator battery in my coach. It takes two 8D’s because one is not enough CCA to start the 8v92. Each one has 1300 CCA. What I would like to do, but I don’t know how to do it, is add two more high amp starting batteries just for starting the engine and separate the 8D’s to be used for house batteries. That way the starting batteries should always be at full voltage and the house batteries can be run low and then charged by the engine alternator. I think the six volt batteries were an attempt to get more camping amp hours out of the battery bank but the bigger problem with older coaches is the single battery bank IMO.

88PT38