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Open Roads Forum  >  General RVing Issues

 > Can this be done? Charging battery question.

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bryanl

Reno, NV

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Joined: 12/25/2003

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Posted: 05/04/12 10:07am Link  |  Print  |  Notify Moderator

re: "The first obvious problem is that the truck batteries aren't deep cycle. You would certainly have a negative effect on the longevity of the batteries."

oh. no. not the deep cycle thing again ;-(

the term has no usable pertinent definition in the RV context, cycle life isn't an issue in typical RV use, ... what is at issue is that you just avoid any deep cycling of your batteries which is necessary in due consideration of an appropriate reserve as well as battery life.

I think Don is on the right track. It takes time to properly and fully charge a lead acid battery and such a charge is needed for best battery service satisfaction and life.


Bryan

beemerphile1

I'm 57, I'm not a

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Posted: 05/04/12 10:20am Link  |  Print  |  Notify Moderator

vesh1717 wrote:


...the good thing is that I don't have AC or a microwave in my travel trailer...Running the water pump is the biggest concern for us likely.


The water pump is not a concern, let's do some math. I will make up an example but you can find your specs and figure out your needs.

50 gallons fresh water
2.5 GPM pump that pulls 8 amps

50 divided by 2.5 = 20 minutes to drain the tank.

20 minutes at 8 amps = 2.67ah or the equivalent of operating a typical two bulb ceiling fixture for one hour.


Even if you are on the right track, you'll get run over if you just sit there.
- Will Rogers, American actor


2006 Weekend Warrior FK1900/1998 Ford E150 4.6L = 8MPG
2009 Aliner Sport/2009 Pontiac Vibe 1.8L = 22MPG


mowermech

Billings, MT

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Posted: 05/04/12 11:07am Link  |  Print  |  Notify Moderator

Will it work?
Yes, of course it will.
However, in my Tioga Class C, given the choice between running a 4KW Onan generator and a 460 Cu. In. Ford V8 to charge a couple of batteries, I will run the generator!
Same goes for my son's fifth wheel; given the choice between the 360 Cu. In. Cummins, and the built-in 3.6KW propane powered generator, the generator wins!
No matter how I look at it, whether it be noise, fuel cost, pollution, green-house gasses, whatever, the generator wins, IMO.
Yes, solar is great. IF the sun is shining!
Wind power is great, too, IF the wind is blowing!
And, if the wind is not blowing TOO MUCH!
Besides, I already have the generators, no need to spend the money on solar panels or a windmill.


CM1, USN (RET)
2002 Fleetwood Southwind 32V, Ford V10
Toad: 2006 Jeep Rubicon LJ
Other toad: '06 PT Cruiser, Kar Kaddy dolly
Toy: 1977 Dodge W100 CC SWB, 3/4 ton axles & springs
"When seconds count, help is only minutes away!"

RickCamping

Chicago Area

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Posted: 05/04/12 11:34am Link  |  Print  |  Notify Moderator

I have one battery on the camper and one spare battery that I keep in the back of my vehicle. When the one on the camper gets low I switch it out with the one in the back of the vehicle. I use a battery charger plugged into an inverter which is plugged into the cigarette lighter to charge the battery when we are out driving around. This charges the battery in the back so it is ready when the one on the camper gets low (usually around 2 days use). I only have the inverter and charger on when driving so it doesn't drain the vehicle battery. It has worked well for us as we tend to drive around to see sites, shopping, etc, enough to get it charged up.

beemerphile1

I'm 57, I'm not a

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Joined: 04/20/2007

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Posted: 05/04/12 01:45pm Link  |  Print  |  Notify Moderator

mowermech wrote:

Will it work?
Yes, of course it will.
However, in my Tioga Class C, given the choice between running a 4KW Onan generator and a 460 Cu. In. Ford V8 to charge a couple of batteries, I will run the generator!
Same goes for my son's fifth wheel; given the choice between the 360 Cu. In. Cummins, and the built-in 3.6KW propane powered generator, the generator wins!
No matter how I look at it, whether it be noise, fuel cost, pollution, green-house gasses, whatever, the generator wins, IMO.
Yes, solar is great. IF the sun is shining!
Wind power is great, too, IF the wind is blowing!
And, if the wind is not blowing TOO MUCH!
Besides, I already have the generators, no need to spend the money on solar panels or a windmill.


Since the OP said;
vesh1717 wrote:


...If I am without shore electricity, can I simply hook up jumper cables and charge my RV battery...I don't have a generator, and don't plan on getting one.


What does your post have to do with the question?

AO_hitech

SF Bay Area

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Joined: 08/09/2004

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Posted: 05/04/12 02:51pm Link  |  Print  |  Notify Moderator

BTW, that is what my MH does when I drive it (and most others work about the same). When I start the MH a "relay" engages and connects the house battery to the chassis battery. Both are charged this way. Not terribly efficient unless you are driving. But it certainly works well when you are driving anyway.

EDIT: Sorry, read it wrong. I wouldn't connect them together unless the engine is running, as others have said.




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