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Old 02-23-2015, 12:40 AM   #1
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Buying a New MH that has been in -15 weather (what happens to the new batteries?)

Hello Friends! I hope to pick up my new MH next week, my questions is my dealer is in Niagara Falls as we all know it has been very cold there specially during this past month, my MH arrived from Red Bay the third week of January and because of all the cold and bad weather I pushed my pick up for the week of March 2nd, as we all know this past week it was even colder in Niagara Falls my question, does anyone know how does a dealer keep the batteries on all of the new coaches they have in house charged and I guess warm since all of the batteries I have seen all say DO NOT FREEZE!!! If I do pick up my new rig next week, how do I know if all of my batteries are OK on my new rig?? Thanks in advance!
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Old 02-23-2015, 12:49 AM   #2
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Quote:
Originally Posted by Grandcanyon View Post
Hello Friends! I hope to pick up my new MH next week, my questions is my dealer is in Niagara Falls as we all know it has been very cold there specially during this past month, my MH arrived from Red Bay the third week of January and because of all the cold and bad weather I pushed my pick up for the week of March 2nd, as we all know this past week it was even colder in Niagara Falls my question, does anyone know how does a dealer keep the batteries on all of the new coaches they have in house charged and I guess warm since all of the batteries I have seen all say DO NOT FREEZE!!! If I do pick up my new rig next week, how do I know if all of my batteries are OK on my new rig?? Thanks in advance!
If batteries were to freeze at minus 15 then most batteries in Canada and the north of the US would be toast every winter. They will only freeze if seriously discharged and it will be obvious as the cases will be bulged out on all sides, perhaps even cracked.
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Old 02-23-2015, 12:50 AM   #3
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Come on we don't take the batteries out of our cars every night to keep them warm. Don't worry about it nothing a good charge couldn't cure.
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Old 02-23-2015, 12:52 AM   #4
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Those temperatures won't hurt your batteries at all as long as they were charged to begin with. I live in Fairbanks Alaska and I have batteries in all sorts of my vehicles and they hold up just fine. They will not freeze unless the charge is down in them and a frozen battery will bulge the case and be obvious that it had been frozen.
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Old 02-23-2015, 07:55 AM   #5
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If anyone has trouble sleeping tonight, please read this!!

Batteries have water-sulfuric acid solutions.

There freezing point of water-sulfuric acid solutions varies as a function of concentration in an unusually complex way, having plural local minima and maxima.

This is because the solid has eight identifiied phases,

H2O
H2SO46H2O
H2SO44H2O
H2SO43H2O
H2SO42H2O
H2SO4 H2O
H2SO4 and

H2S2O7
with mixtures of the various phases reaching local minimum freezing points at eutectic points.

The freezing point can be as low as -71 degrees C near 31% (on an SO3 basis) and as high as 35 degees C near 90%.

See Phase Equilibria of the System Sulfur Trioxide-Water J. Am. Chem. Soc., 1950, 72 (4), pp 1445–1448.
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Old 02-23-2015, 09:11 AM   #6
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Hi Grandcanyon,
Unlike other members who posted, my view is you do have a valid concern. The concern I would have is not from the batteries freezing but from the degradation in battery life from not being fully charged and left in the very cold. You are buying a new coach and deserve batteries that are able to perform like new. One does not know the condition of the batteries when the coach was delivered to the dealer.
Answers to your questions are:
1. Dealers, in general, do noting to a coach from the time it is delivered until just before you pick it up.
2. The only way I know of to check the statuse of the batteries is to:
2a. make sure the batteries are fully charged
2b. do a load test on each battery, follow the instructions that come with the load tester. If you purchase this device (online or any auto parts store) make sure it is rated at 100 AMPS minimum. My tester is rated at 130 AMPS.
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Old 02-23-2015, 12:53 PM   #7
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If the batteries actually froze, they case would likely be split. Not guaranteed, of course, but likely. Low temperature itself does not harm or degrade them as long as they don't actually freeze.

A very cold battery performs poorly (low amps available), but that's just the effect of temperature on the chemical processes. As soon as it warms up, the performance increases again.

As someone already said, cars and trucks in northern climates operate in sub-freezing temperatures all the time.
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Old 02-23-2015, 12:58 PM   #8
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Do you ask the same question when you purchase a vehicle? I would not worry about the batteries freezing. I am sure they too have a warranty.
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Old 02-23-2015, 01:04 PM   #9
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Normally in a not yet delivered motor home the batteries will be charged and disconnected, very little load on 'em.. -15 is nothing to a fully charged battery, -30 is still nothing, -40... Well, you might start to be concerned.

In days of old when I was bold my car would not start, You see the Transistors in my solid state ignition system did not work well past -40.

Finally gave up, hitched a ride home in a State Police car, returned next day with wife's car and it cranked right up..

And that battery was seriously "Low" when I went home. (Likely 80-85 percent soc).
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Old 02-23-2015, 02:17 PM   #10
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Fully charged batteries freeze at -70, discharged at about 10degrees. All temps Centigrade.

https://mathscinotes.wordpress.com/2...freezing-math/
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Old 02-24-2015, 06:49 AM   #11
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I wouldn't be worrying about the batteries. I would be worrying about the Pre Delivery Inspection. Do they have a heated Shop in which they will do the walk through? I would not accept delivery until I see every thing work, everything.

IMHO
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Old 02-24-2015, 11:14 AM   #12
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I wouldn't be worrying about the batteries. I would be worrying about the Pre Delivery Inspection. Do they have a heated Shop in which they will do the walk through? I would not accept delivery until I see every thing work, everything.

IMHO

Ah, yup. Times two. Have them write an agreement that you get full battery replacement or some thing if they fail a load test after full charging. Especially if you are concerned. I might be too.


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Old 02-25-2015, 12:12 AM   #13
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Thank you all! I appreciate all of the information, I'm well aware that batteries are used all over the world in the cold, my concern is that since the batteries are new and probably not fully charged just sitting at the dealer I have my concerns with them, I will get one of the tester to check the load, this way at least I will not need to worry about them. As for the day I do the final inspection with the dealer they do have a heated area for deliveries and they also offer a couple of overnight stay at their dealer to make sure everything is working correctly but it will be very cold at that lot!!! Again Thanks to everyone!
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Old 02-25-2015, 08:31 AM   #14
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If you really want something to worry about, research what happens to batteries that are stored in hot environment. That's what really kills a battery.
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