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Old 09-25-2015, 05:15 PM   #15
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Originally Posted by wa8yxm View Post
Fire up that big engine and accelerate to an RPM that you would expect to see at say 60MPH,, Say 20,000 RPM.

Wow! That engine is a BEAST ! 20,000 RPM 😳

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Old 09-25-2015, 05:26 PM   #16
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Originally Posted by Chuck_Hammer View Post
I know on my 2012 Ford F 250.. there is a 25 amp fuse between the truck and the travel trailer battery..... so truck alternator may not exceed 25 amps to the trailer battery or the fuse will blow....

my travel trailer has a 55 amp smart charger..... so it would be faster

and my Truck as a 155 amp alternator.
Correct, in a trailer setup, the wire run from the front of the truck to the trailer battery is long and only 12 or 10 gauge. That and the trailer connector, limits the charging current.

If you went nuts and ran a pair of 2 gauge cables, with a big connector, you could handle more amps.

Not real practical.

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Old 09-25-2015, 05:52 PM   #17
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I would vote on the alternator while driving down the road.
Gordon and Janet
Tour 42QD/inTech Stacker
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Old 09-26-2015, 06:56 AM   #18
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Charging battery but boils

I have a problem that my house batteries (two interstate 6V GC2 232amp dated May 2012) are hot and boiling but my chassis battery is cool and normal when batteries are charged via alternator. Does not do this when using my PD9260 converter. I've had house batteries load tested and hydrometer tested by several facilities and they swear the batteries are good and no cell shorts. Some say could be my alternator. Alternator is new as of April 2015. I could believe that by everyone also says alternator is putting amps within specs 14.0 14.9 with average at 14.4 and my chassis battery is cool and not boiling. Two questions, well three:

1. How can chassis battery be Normal and house batteries boil?

2. Can interstate 6v GC2 batteries show good but really be bad?

3. What else could be wrong if alternator and batteries are good?

I have posted this problem in the Class A forum but have not solved problem ?
Any help is greatly appreciated.
Tom Lopez, USMC Retired
2004 Fleetwood Southwind 32VS
DeForest, WI
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Old 09-26-2015, 07:23 AM   #19
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I'd be taking a little closer look at those 6v batts.
1997 37' HR Endeavor, 275hp Cat, Freightliner
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Old 09-26-2015, 07:36 AM   #20
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Converter, plugged in to electric source. According to RV Geeks.com
Neal and Deb + Mya and Gizmo, the pup's
2003 Winnebago Sightseer 30B

May the roads rise up to meet you, May the winds be always at your back...
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Old 09-26-2015, 09:23 AM   #21
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Voltage at top of each stack.

Now voltage of each unit.

Both 6 volt should be very close to each other.
Tony & Lori
1989 Country Coach Savannah SE
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Old 09-26-2015, 02:20 PM   #22
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Replaced ours recently, for the same issue. We couldn't keep water in them - and they were 10 years old! I don't remember the specifics, but even though the 2 batteries matched when voltage was measured, they would not charge over about 12.5v (if memory serves me?). This left both the alternator and power converter thinking they were low and trying to charge them pretty much non stop. Because they were already as full as they were able, they ran warm and boiled the water out of them. FWIW -Al

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