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Old 01-28-2016, 07:26 AM   #15
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Join Date: Jun 2015
Location: The hilly part of Texas
Posts: 255
This may help..

Charging Information For Lead Acid Batteries €“ Battery University

You are likely not getting a full charge on the battery as its not being charged long enough.

Also...cold temps .... below 70ish ... sucks the charge out of batteries. So if you are 50% charged...when the temp drops and cold soaks the battery you may only have 25%....


???... Do you have a SoC indicator that shows battery voltages in the coach? Even indicator LEDs will help. First thing...flip on the coach master everthing else off... Check the SoC!

Post a chart like this for reference next to your SoC meter.


Last...dig into that bag of flyers & manuals that came with the RV. Find the manual for your charger. Read ... and understand how it works when charging....every manufacturer is different & your charging scheme may vary.

NOTE: You can't check SoC while charging....that will tell you the voltage that is being applied to the battery!!! **** Not the SoC. Battery should be rested for a short time after charging for a better reading.

**** That is also a good thing.. A reading of something like 13+ to 14+V when charging tells you that the battery is being charged but is not the battery's SoC.

I hope this helps...

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Old 01-28-2016, 07:50 AM   #16
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Originally Posted by Brandonrv View Post
I have a 2014 Bounder. Is it normal after a couple years to need new house batteries?

There are switches to cut the batteries off completely and I always do that. When I fire the MH back up though they are borderline dead. Can't even turn the lights on until I let it idle for about 10 minutes.

I don't mind that I need to replace them so much. Just wondering if it's normal. I guess they could be about 3 years old at this point.
The one thing (after reading all the thread) is I don't know how long or how you are charging the battery's after you find they are dead. I suspect that besides being low on electrolyte you are not getting a good charge before you go back to your storage mode. Do you have shore power available where you store your coach? Learning how to maintain everything in your coach is quite a task.
Hearer is some home work for you.

Battery Maintenance | Trojan Battery Company


2003 Bounder 38N
5.9 Cummins 3000MH Allison Trans.
Towing a 2014 Honda CRV with a Blue Ox tow bar.
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Old 01-28-2016, 08:44 AM   #17
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Old Crows is offline   Reply With Quote

batteries, house batteries

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