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Old 09-08-2020, 09:29 AM   #1
1 Rivet Member
 
2019 Interstate Grand Tour Ext
Aliso Viejo , California
Join Date: Aug 2020
Posts: 8
House Batteries in Red Zone

Last night was our first night of camping with no hookups. Our batteries were CHS 12.4V and HSE 12.7V when we arrived. When we turned in for the night, our batteries were CSH 12.9V and HSE 12.3V. As far as I know, only the refrigerator was on. Wanting to conserve our batteries, we only used LUMI solar lights, not house batteries. This morning when we went to stow the bed, I hit the lounge switch....nothing happened. I then checked the batteries and low and behold HSE was in the RED zone 11.9V. I started the engine and immediately was able to stow the beds. Now the HSE is at 12.0V. It's a little disconcerting that with only the refrigerator on, the house batteries run down that much. Is this normal? Am I doing something wrong? I was very careful to manage our use of power and yet here we are. I look forward to better understanding the limits of our new 2020 Interstate GT. Thanks in advance for your suggestions.
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Old 04-16-2021, 11:31 AM   #2
2 Rivet Member

 
2021 Interstate 24GL
San Francisco , California
Join Date: Feb 2021
Posts: 21
Quote:
Originally Posted by DennyO View Post
Last night was our first night of camping with no hookups. Our batteries were CHS 12.4V and HSE 12.7V when we arrived. When we turned in for the night, our batteries were CSH 12.9V and HSE 12.3V. As far as I know, only the refrigerator was on. Wanting to conserve our batteries, we only used LUMI solar lights, not house batteries. This morning when we went to stow the bed, I hit the lounge switch....nothing happened. I then checked the batteries and low and behold HSE was in the RED zone 11.9V. I started the engine and immediately was able to stow the beds. Now the HSE is at 12.0V. It's a little disconcerting that with only the refrigerator on, the house batteries run down that much. Is this normal? Am I doing something wrong? I was very careful to manage our use of power and yet here we are. I look forward to better understanding the limits of our new 2020 Interstate GT. Thanks in advance for your suggestions.
DennyO, I ALSO have been experiencing this with our 2021 Interstate GL (btw, glad my cross country lessons learned post was enjoyable read . Similarly, when we are not plugged in, I leave the fridge on under the theory that my solar panels should charge/top up the lithium house batteries each day and the total amp usage of the fridge is minimal so it won't deplete it overnight. I'm still trying to get to the bottom of this and happy to share/compare notes when I figure it out!
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Old 04-16-2021, 01:32 PM   #3
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2014 20' Flying Cloud
Long Island , New York
Join Date: Jun 2015
Posts: 16,305
You might want to check the "Sprinter and b-van" Interstate forum . . . your units have unique battery issues:

https://www.airforums.com/forums/f240/

"Interstate battery issues" -- https://www.google.com/search?q=Inte...=airforums.com

This Battery School is good general reading for RV battery usage: http://www.batteriesnorthwest.com/ba...hool.cfm?TID=0

Good luck.
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