Starting Batteries (Engine only!)

[Pete Masterson]

The three type 31 batteries have about 3000 CCA (at 0 degrees F) available -- about 1000 CCA each. The large house batteries (in my coach they're type 4D) have about 1100 CCA (0° F) -- so you'd still need 3 of them and there's no room. The house batteries are designed for slow, long period discharge. The engine batteries are designed for immediate quick supply of amps to drive the starter motor. They don't produce that amperage for very long, but they dump out a lot of power in a short time. That's the basis of the design differences between deep discharge and regular engine starting batteries.

Aside from the sometimes problems that 3 batteries cause, you're better off to stick with the three type 31s as originally designed.

Pete Masterson

'95 Blue Bird Wanderlodge WBDA 42

El Sobrante CA

"aeonix1@mac.com"

On May 26, 2008, at 6:51 PM, KB9BG wrote:

Thanks Greg for the reply, thus the reason for the poll of members for I am very concern about the DDec electrical issues also.  My AGM batteries are Deka SeaMate & RV AGM brand Absorbed Glass Mat Technology Deep Cycle with 198AH @ 20HR and 1110 CCA and mention on the side of the batteries (6) that they are:

 

1.      Leak proof

2.      Superior Cycle Life

3.      Completely Maintenance Free

4.      Heavy-Duty Power for Trolling Motors, House Power and Accessory Loads

5.      Good for Engine Starting

The above may be all advertising issues to sell this type of battery!!!!!!!…

 

Now we have the issue of this battery doing the 1110 CCA for purpose of starting the engine vs. three (3) batteries hook together (I guess we can always use the relay switch to throw all other House Batteries in needed situations…..).

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