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Old 07-18-2014, 08:20 PM   #1
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New house batteries question

Ok so I have brand new 6 volt house batteries sitting in my garage waiting to be installed. Should I put these on a charger prior to installing or let the coach finish charging them?
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Old 07-18-2014, 08:31 PM   #2
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Ok so I have brand new 6 volt house batteries sitting in my garage waiting to be installed. Should I put these on a charger prior to installing or let the coach finish charging them?
six of one and 1/2 dozen of another type thing
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Old 07-18-2014, 08:43 PM   #3
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If brand new then no real need to charge them...

But if you have a 6 volt charger it coukd be good to top them off as the state of charge may not be same and this would equalize them
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Old 07-18-2014, 08:46 PM   #4
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They should be almost fully charged. I would install them and let the motorhome top them off. Less likely hood of electrolyte spilling if they are not at 100% charge.
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Old 07-18-2014, 08:55 PM   #5
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Install. Charge on the way to go camping.
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Old 07-18-2014, 09:12 PM   #6
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Install first then let the engine charge it.
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Old 07-18-2014, 09:19 PM   #7
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Charge the up in your garage to full charge, then install. If a alternator is over loaded due to low batteries, it will heat up, and maybe take it out$$$$$
Don't ever let a alternator charge a dead battery...........use a battery charger using 120vac to do the work , then let your DC charging system maintain them.
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Old 07-18-2014, 09:26 PM   #8
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OP stated that the batteries were charged and needed to be topped off. They weren't stone cold dead. Even if they were the alternator would have no problem in charging them. If you have a dead battery in your car and someone jump starts you do you instead take the battery out , charge it then replace it? Or do you just let the alternator charge it up?
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Old 07-18-2014, 10:01 PM   #9
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Thanks everybody. Now if I can just find someone with some big forearms to help me lift them in there.
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Old 07-18-2014, 10:07 PM   #10
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It really does not matter much...unless you get picky...


If both batteries have same state of charge it does not matter.

However all batteries self discharge over time.

Unless the batteries are true brothers born at same time they may be at different states of charge requiring excess current through the one with the higher state of charge.

It should be fine to just put them in and let the converter or engine charge them but not tge best way.

The term "equalize" is for multiple battery plants where there may be many seperate batteries combined.

Over time the state of charge in them gets different.

They were charged at a higher rate to equalize all of the cells.

Single 12 volt battery has all cells exposed to same thing to usually are close enough.

With 2 seperate units in series one is likely a little different from the other.

So if you wish for best outcome charge each seperately with 6 volt charger until floating or fully charged.

This can be done before or after installation.

After they each have soaked or fully charged then check water level and adjust as needed.

Leave in disconnect mode for 24 hours and measure each and confirm same voltage on both.

Lots of other "oh by the way" things to do to confirm status of new batteries and setup your maintenance plan but that is for your discovery vis searching the forum.
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Old 07-19-2014, 12:51 AM   #11
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Another battery question:

I've got a 2013 Thor Ace with two twelve volt house batteries that are connected together in parallel. I've got plenty of room in my battery bay for a third battery. Does anyone see a problem with adding a third similar battery connected in parallel with the other two?

--DonK
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Old 07-19-2014, 01:15 AM   #12
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When the batteries are in parallel, the stronger one will discharge into the weaker ones. If you have the money to do it, better to buy all three new at the same time. If the other two are in really good condition, you can try just adding a third. It should be the same brand and type as the other two.
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Old 07-19-2014, 01:20 AM   #13
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Thanks. I think I'm OK with just adding a similar one since the rig only has 8000 miles on it--the original pair should be in pretty good shape. I guess my question was really more about worrying whether or not I might overtax a power converter or alternator that may have been designed to work with two batteries, and not three. It seems to me that it shouldn't matter, but wasn't quite sure.

--DonK
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Old 07-19-2014, 01:22 AM   #14
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Quote:
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Another battery question:

I've got a 2013 Thor Ace with two twelve volt house batteries that are connected together in parallel. I've got plenty of room in my battery bay for a third battery. Does anyone see a problem with adding a third similar battery connected in parallel with the other two?

--DonK
It is NOT recommended to electrically connect batteries of like size that are different ages or different discharge history.

Note ...... always best to start a new thread when changing topic
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