Reply
 
Thread Tools Display Modes
Old 08-29-2013, 12:34 PM   #1
Junior Member
 
Join Date: Jun 2013
Posts: 15
Heater Help II - running on batteries?

We got the answer to our question, thanks! Now if you don't mind we another question, can we run the furnace off of 2 12volt batteries? And what would be the duration of the batteries?
__________________

__________________
Gensca is offline   Reply With Quote
Old 08-29-2013, 12:38 PM   #2
Phat Phrog Stunt Team
 
TURBS's Avatar
 
Join Date: Aug 2011
Location: Iowa
Posts: 34,337
Quote:
Originally Posted by Gensca View Post
We got the answer to our question, thanks! Now if you don't mind we another question, can we run the furnace off of 2 12volt batteries? And what would be the duration of the batteries?
Yes you can run off of 12 volt/propane.
Usage and battery size will determine battery life.

Do You have the means to recharge it?
__________________

__________________
TURBS is offline   Reply With Quote
Old 08-29-2013, 01:03 PM   #3
Junior Member
 
Join Date: Jun 2013
Posts: 15
Thanks! But can we expect the 2 12 volt marine batteries, hooked up in series to last one night with the thermostat set low (70*F)?
__________________
Gensca is offline   Reply With Quote
Old 08-29-2013, 01:08 PM   #4
Fulltime family RVer
 
ependydad's Avatar
 
Join Date: Nov 2011
Posts: 14,762
I really have no idea here. I know the furnace is one of the biggest battery consumers, but I don't have the foggiest idea how much or how long the batteries will last.

What do you know about the batteries? How many amp-hours are they? Are they definitely deep cycle batteries?

(And, that's about the extent of my knowledge! Others will need to chime in.)
__________________
2012 Ram 3500 DRW/crew cab/long bed/4x4/4.10 gears pulling an early 2013 Sabre 36QBOK
Checkout my site for RVing tips, tricks, and info | My family and I have fulltimed since June 2015
ependydad is online now   Reply With Quote
Old 08-29-2013, 01:08 PM   #5
Phat Phrog Stunt Team
 
TURBS's Avatar
 
Join Date: Aug 2011
Location: Iowa
Posts: 34,337
Quote:
Originally Posted by Gensca View Post
Thanks! But can we expect the 2 12 volt marine batteries, hooked up in series to last one night with the thermostat set low (70*F)?
Many variables here but the short answer is you'll likely get through the night if they are fully charged when you start.

I've went one night on one battery but it wasn't that cold.

Variables :

Battery/batteries condition. "Age"
Outside temp /windchill.
R value insulation of camper.
Thermostat setting.
Size of camper.

Etc etc


Turbs
__________________
TURBS is offline   Reply With Quote
Old 08-29-2013, 01:09 PM   #6
Moderator Emeritus
 
Triguy's Avatar
 
Join Date: Aug 2010
Location: Southeast Wisconsin
Posts: 6,950
Quote:
Originally Posted by Gensca View Post
We got the answer to our question, thanks! Now if you don't mind we another question, can we run the furnace off of 2 12volt batteries? And what would be the duration of the batteries?
As Ron said, the furnace will work with your 12volt system.

As for how long those two batteries last depends on the following:
  • What kind of battery and how big (In amp-hours such as the 20hr rate)?
  • How long does the furnace need to run?
  • What are your other power needs during the period?
That info will help estimate for you.

Also, keep in mind that you do not want to discharge your batteries under 50% SOC before fully recharging. So, you basically have half the capacity you think you do.


Here's a nicely written primer on everything 12 volt.
Forest River Forums - Downloads - 12 volt side of Life
__________________
Scott
DW, 3 Kids and our Goldens

2012 Shamrock 233S
2008 Toyota Sequoia 5.7L 4WD
Triguy is offline   Reply With Quote
Old 08-29-2013, 01:09 PM   #7
Senior Member
 
Join Date: Nov 2012
Location: X
Posts: 2,781
Series connection is a really bad idea since that will give you 24v and cook everything. I'll assume you meant parallel.

You'll have to tell us the amp-hour rating or "reserve capacity" of the batteries in order to get an answer. Marine batteries are not all the same.
__________________
BarryD0706 is offline   Reply With Quote
Old 08-29-2013, 01:10 PM   #8
Phat Phrog Stunt Team
 
TURBS's Avatar
 
Join Date: Aug 2011
Location: Iowa
Posts: 34,337
Average Furnace amp draw is 10-12 amps.


Fyi


Turbs
__________________
TURBS is offline   Reply With Quote
Old 08-29-2013, 01:15 PM   #9
Fulltime family RVer
 
ependydad's Avatar
 
Join Date: Nov 2011
Posts: 14,762
Scott, what's SOC?

And Ron, the 12-15amp? How does that relate to amp hours?
__________________
2012 Ram 3500 DRW/crew cab/long bed/4x4/4.10 gears pulling an early 2013 Sabre 36QBOK
Checkout my site for RVing tips, tricks, and info | My family and I have fulltimed since June 2015
ependydad is online now   Reply With Quote
Old 08-29-2013, 01:17 PM   #10
Moderator Emeritus
 
Triguy's Avatar
 
Join Date: Aug 2010
Location: Southeast Wisconsin
Posts: 6,950
Quote:
Originally Posted by ependydad View Post
Scott, what's SOC?

My apologies to the OP for the arcane lingo.

SOC = "State of Charge".
__________________

__________________
Scott
DW, 3 Kids and our Goldens

2012 Shamrock 233S
2008 Toyota Sequoia 5.7L 4WD
Triguy is offline   Reply With Quote
Reply

Tags
heater, batteries

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Virginia Campgrounds

Reviews provided by




ForestRiverForums.com is not in any way associated with Forest River, Inc. or its associated RV manufacturing divisions.


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 03:45 AM.