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Old 04-27-2009, 06:51 AM   #15
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One other point: if the "deep cycle" has a CCA rating sufficient for the engine to be started, there is no reason not to use it for that purpose. However, most true deep cycles have a relatively low CCA rating for their size, which reflects their design intention of "low amps for a long time".

I would guess an 8.1LV8 engine would want to have a battery with at least a 700 CCA rating, but your owners manual should tell.

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Old 04-27-2009, 09:00 AM   #16
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Gary, I looked up the rating as you suggested and it stated Workhorse supplies a battery rated at 690 CCA at zero degrees. There is also a nice chart comparing batteries CCA abilities related to temperature.

The chart (on page 58 of the Workhorse Owners manual) shows a a full-charged 405 CCA battery at 80 degrees has a 880 CCA listing, at 32 degrees has a 598 CCA and at 0 degrees has a 405 CCA.

Since our travels are within the areas that don't go to below freezing when we are traveling I think we should be okay with using the battery in question. I also keep all the batteries fully charged during storage at home.


2003 Itasca Suncruiser 33V
8.1 GMC, Workhorse, Allison, Koni's
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Old 04-29-2009, 03:33 PM   #17
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Another point that I don't believe has been mentioned is besides supplying a large amperage for a short time to get your engine started, a "regular" battery also recharges or recovers in a short amount of time. You may have noticed this if you ever tried to recharge your trailer battery from the tow vehicle. It takes quite a bit longer while a couple of trips around the block will do for your car/truck battery.
Your RV battery can also withstand a deeper discharge and still recover. Hence the name "deep cycle".

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