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02-27-2021, 08:36 AM
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#1
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Junior Member
Join Date: May 2019
Posts: 3
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Battery Charger Connection help
I have a 2012 Winnebago Via Class A Sprinter 3500 diesel engine. I forgot to disconnect the chassis battery and had to jump it and it started right up.
I have this charger, Battery Tender Power plus 3 Amp Charger, 6V and 12V. My question is, do I need to take the battery out of the floor (drivers side) to charge it or can I charge it the same way I jumped it?
Plug the charger into the wall and hook it up to the positive cable and the ground rod? Let it set and charge for a day or two?
Thanks
I
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02-27-2021, 08:42 AM
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#2
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Senior Member
Monaco Owners Club
Join Date: Sep 2014
Posts: 4,569
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Quote:
Originally Posted by Scorn
I have a 2012 Winnebago Via Class A Sprinter 3500 diesel engine. I forgot to disconnect the chassis battery and had to jump it and it started right up.
I have this charger, Battery Tender Power plus 3 Amp Charger, 6V and 12V. My question is, do I need to take the battery out of the floor (drivers side) to charge it or can I charge it the same way I jumped it?
Plug the charger into the wall and hook it up to the positive cable and the ground rod? Let it set and charge for a day or two?
Thanks
I
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There's no reason you can't just hook up a charger like you would with your car. You don't need to take the battery out.
Are you sure you don't have a boost switch that would have got you going with out jumping?
Good luck.
__________________
1996 Tioga Class C
2007 Monaco Diplomat 40 PDQ
TOAD 2012 Cadillac SRX 4
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02-27-2021, 10:15 AM
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#3
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Senior Member
Join Date: Jul 2014
Posts: 35,439
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Charge it like you jumped it.
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02-27-2021, 11:34 AM
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#4
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Senior Member
Join Date: Jun 2012
Location: NorCal
Posts: 3,000
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Ditto, just connect POS and NEG.
__________________
Outbound
2002 Monaco Executive 500 ISM
2004 GMC 2500HD 4X4
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02-27-2021, 11:35 AM
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#5
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Senior Member
Join Date: Jun 2012
Location: NorCal
Posts: 3,000
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Welcome to the forum. 
__________________
Outbound
2002 Monaco Executive 500 ISM
2004 GMC 2500HD 4X4
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02-27-2021, 12:01 PM
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#6
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: May 2016
Location: Kamloops, BC, 60 miles from the Center of the Universe according to the Rinpoche, of the SF monks.
Posts: 7,395
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You can even wire it up solid, and leave it there all the time.
That way whenever you hook up to 120 volts, it will charge and maintain it.
This is if you have it stored and powered up.
__________________
Happy Glamping, Norman & Elna. 2008 Winnebago Adventurer 38J, W24, dozens of small thirsty ponies. Retired after 40 years wrenching on trucks! 2010 Ford Ranger toad with bicycles or KLR 650 in the back. Easy to spot an RVer, they always walk around with a screwdriver or wrench in one hand! 
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02-28-2021, 05:50 AM
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#7
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Junior Member
Join Date: May 2019
Posts: 3
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How long with it take to charge? I was afraid to let it hooked up in the rain so I took it loose after about 4 hours and it was not reading green, but yellow. It did start easy.
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02-28-2021, 08:18 AM
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#8
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: May 2016
Location: Kamloops, BC, 60 miles from the Center of the Universe according to the Rinpoche, of the SF monks.
Posts: 7,395
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At 3 amps it will likely take over 24 hours.
You can check the state of charge by unhooking the charger and letting the voltage stabilize for 5 to 6 hours, then check the voltage.
There are charts giving state of charge (SOC) you can find on the internet. I will see if I can find one.
The SOC is only one thing to check. You will also need to know the capacity of the batteries. As they age and are charged and drained (cycled) they will loose capacity.
__________________
Happy Glamping, Norman & Elna. 2008 Winnebago Adventurer 38J, W24, dozens of small thirsty ponies. Retired after 40 years wrenching on trucks! 2010 Ford Ranger toad with bicycles or KLR 650 in the back. Easy to spot an RVer, they always walk around with a screwdriver or wrench in one hand!
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02-28-2021, 08:31 AM
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#9
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner
Join Date: May 2016
Location: Kamloops, BC, 60 miles from the Center of the Universe according to the Rinpoche, of the SF monks.
Posts: 7,395
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Here's a SOC table. Remember that you have to let the battery rest or discharge it for a short time to get rid of the surface charge.
__________________
Happy Glamping, Norman & Elna. 2008 Winnebago Adventurer 38J, W24, dozens of small thirsty ponies. Retired after 40 years wrenching on trucks! 2010 Ford Ranger toad with bicycles or KLR 650 in the back. Easy to spot an RVer, they always walk around with a screwdriver or wrench in one hand!
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Linear Mode
