RV Trip Planning Discussions

Go Back   iRV2 Forums > iRV2.com COMMUNITY FORUMS > iRV2.com General Discussion
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 08-11-2019, 04:37 PM   #1
Member
 
National RV Owners Club
Join Date: Sep 2017
Location: Reno, NV
Posts: 82
Using heater with Inverter

We were dry camping last fall and it was cold enough that we left the heater on while we slept. We set it at 65 and the house batteries were dead when we awoke.

Should we avoid using the heater with the Inverter or is a half an hour here and there okay?

Thanks
__________________

__________________
2004 National Tropi-Cal 370 DP
Xantrex Inverter, Onan Generator, Jeep Wrangler toad,
Mostly Boondock, have solar on roof.
Mogulite is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 08-11-2019, 04:45 PM   #2
Senior Member
 
Unplanned's Avatar
 
Join Date: May 2016
Location: Kamloops, BC, 60 miles from the Center of the Universe
Posts: 3,014
How about getting something like a "Buddy Heater"? Just use it while you are up, and get some more blankets for while you sleep.
Happy Glamping.
__________________

__________________
2008 Winnebago Adventurer 38J, W24, dozens of small thirsty ponies. Retired after 40 years wrenching on trucks! 2010 Ford Ranger toad with GSXR 1100T or KLR650 in the back. Easy to spot an RVer, they always walk around with a screwdriver or wrench in one hand!
Unplanned is offline   Reply With Quote
Old 08-11-2019, 04:52 PM   #3
Senior Member
 
Join Date: Jul 2018
Posts: 1,285
Agree with Unplanned, a buddy heater is fine when awake. Otherwise use your propane furnace. Even small electric heaters use 1000 to 1500 watts, very hard on your batteries.
__________________
Foretravel tag axle 40 ft. 500 hp/1550 ft/lbs ism 1455 watts on the roof. 600 a/h's lithium down below.
jcussen is online now   Reply With Quote
Old 08-11-2019, 04:52 PM   #4
Senior Member
 
bamaboy473's Avatar
 
Join Date: Jun 2014
Location: Gulf Coast, Alabama
Posts: 2,287
Somebody else can do the math, but a 1500W heater will suck batteries very, very quickly. Does your coach have a volt meter that tells you house battery voltage?

If so, run the heater for an hour and measure the Begin/End voltage....then get more blankets.
__________________
Rick and Sandy
2003 American Eagle, 59K miles
bamaboy473 is offline   Reply With Quote
Old 08-11-2019, 04:53 PM   #5
WiFiRanger Ambassador
 
docj's Avatar
Official iRV2 Sponsor
 
Join Date: May 2011
Posts: 5,340
Your batteries can each store roughly 200 Amp-hours of energy and are best preserved if you don't draw them down more than roughly half way.

A 1500 watt heater operating from 120V power will draw 12.5 amps. If your inverter was 100% efficient (which it's not) 1500 watts would draw 125 amps at 12 V. So regardless of the exact size of your heater, it will typically draw more than 100 amps from your batteries.

Therefore, it wouldn't take all that long for you to completely discharge the batteries. IMHO high current devices such as heaters shouldn't be operated off of inverters except for very short periods of time.
__________________
Joel Weiss--WiFiRanger RV Ambassador
RVParkReviews administrator
2000 40' Beaver Patriot Thunder Princeton CAT C-12
docj is offline   Reply With Quote
Old 08-11-2019, 04:56 PM   #6
Senior Member/RVM #90
 
MSHappyCampers's Avatar


 
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 38,311
Quote:
Originally Posted by docj View Post
Your batteries can each store roughly 200 Amp-hours of energy and are best preserved if you don't draw them down more than roughly half way.

A 1800 watt heater operating from 120V power will draw 15 amps. If your inverter was 100% efficient (which it's not) 1800 watts would draw 150 amps at 12 V. So regardless of the exact size of your heater, it will draw more than 100 amps from your batteries.

Therefore, it wouldn't take all that long for you to completely discharge the batteries. IMHO high current devices such as heaters shouldn't be operated off of inverters except for very short periods of time.
X2! Good advice!
__________________
Joe & Annette

2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
MSHappyCampers is offline   Reply With Quote
Old 08-11-2019, 04:59 PM   #7
Junior Member
 
Join Date: Aug 2019
Location: Clearwater Florida
Posts: 23
An electric blanket could be a good choice, since the power needed is low; the problem is that some electric blankets and heating pads cannot tolerate MSM inverters.

If you have a PSW inverter or an electric blanker rated for inverters, you could be fine.

Also, a short usage of the space heater on low power should be fine; just be sure to to monitor your battery condition.

Tom
TOM GUY is offline   Reply With Quote
Old 08-11-2019, 05:02 PM   #8
Senior Member
 
Join Date: May 2017
Posts: 493
Quote:
Originally Posted by TOM GUY View Post
An electric blanket could be a good choice, since the power needed is low;
Better than a electric blanket; electric heated mattress pad. And carry and extra blanket, or two, after Labor Day.
__________________
Retired. 31 year of automotive engineering for one of the Detroit 3, specializing in Powertrain Control Systems.
theoldwizard is offline   Reply With Quote
Old 08-11-2019, 05:22 PM   #9
Senior Member
 
Sweetbriar's Avatar


 
Thor Owners Club
Ford Super Duty Owner
Join Date: Jul 2011
Posts: 2,806
Resistive heater (aka electric) will quickly deplete a battery bank. Simplified math, 1800 kWh from 12VDC is 150 amps an hour not including all the losses along the way. With a 50/50 duty cycle (on/off time for temp setting) you might have been able to get 90 minutes or so out of a two 6VDC GC2 batteries before the inverter shuts down for low volts.

I've found an electric blanket along with a low temp setting of the propane furnace when we've camped off grid works well. The blanket wattage is fairly low along with the maybe a 30/70 duty cycle. The furnace blower is an energy hog but not nearly as much as a resistive heater.
__________________
2006 Hurricane 31D built on a 2006 Ford F53
Sweetbriar is offline   Reply With Quote
Old 08-11-2019, 09:40 PM   #10
Senior Member
 
hohenwald48's Avatar


 
Join Date: Jan 2017
Location: Nashville, TN area
Posts: 2,972
Why not just run the propane furnace?
__________________
When seconds count, the police are only minutes away.
2019 Newmar Canyon Star 3627 on a 2018 F-53 26K chassis w/6 speed transmission
2017 Jeep Wrangler JKU with Ready Brute tow system
hohenwald48 is offline   Reply With Quote
Old 08-11-2019, 10:52 PM   #11
"Formerly Diplomat Don"
 
Dutch Star Don's Avatar
 
Newmar Owners Club
Join Date: Apr 2005
Location: Moorpark, Ca.
Posts: 13,685
Same question.....what's wrong with your propane heater. It will still run down the batteries, but not as fast as an electric heater on an inverter. Turn the propane heater down to 55-58 and cover up.

When we boondock at Yosemite, during Thanksgiving, we let a Buddy Heater run all day to keep the interior components warm. I never liked using it at night, but decided that it has enough protection, not to kill you. I open a window in the bedroom and run the Buddy Heat in the main cabin. This lets the heat migrate back and the window provides fresh air. I also leave a roof vent ajar to keep the condensation off the windshield/windows.
__________________
Don & Mary
2019 Newmar Dutch Star 4018
2016 GMC Canyon 4WD Crew Cab
Dutch Star Don is offline   Reply With Quote
Old 08-12-2019, 12:30 AM   #12
Senior Member
 
Join Date: Jul 2014
Posts: 18,546
Delete
twinboat is offline   Reply With Quote
Old 08-12-2019, 12:40 AM   #13
Senior Member
 
Join Date: Aug 2011
Location: Enjoying the Western States!
Posts: 9,324
During our 16 years of full-timing we used a propane catalytic heater.... nice even warm heat. We didn't use any heat at night.... warm comforters.

A RV furnace just wastes heat and uses electric.
__________________
Full-timed for 16 Years . . .
Traveled 8 yr in a 2004 Newmar Dutch Star 40' Diesel
& 8 yr in a 33' Travel Supreme 5th wheel
twogypsies is online now   Reply With Quote
Old 08-12-2019, 01:43 AM   #14
Senior Member
 
Country Coach Owners Club
Join Date: Oct 2016
Location: Branson, MO
Posts: 156
I'm not so sure that the heater he is talking about isn't a propane furnace as I don't see "electric" anywhere in his post. If indeed he's talking propane than yes, a half hour here and there will work. Left on to 65 it would depend on how cold it was outside but yes, a propane will run batts down. The lower you set it, the longer your batts will last (obviously).
__________________

Kodiakan is online now   Reply With Quote
Reply

Tags
heat, heater, inverter



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Using your computer as a flat screen tv when either using antenna or cable SandiLaws Technology: Internet, TV, Satellite, Cell Phones, etc. 14 06-12-2012 08:32 AM
Using inverter ginagary Winnebago Industries Owner's Forum 25 02-24-2011 09:02 AM
refrigerator won't work on LP when using inverter tofran Winnebago Industries Owner's Forum 9 06-30-2008 09:16 AM
Using Laptop on the Inverter? amanda_h Winnebago Industries Owner's Forum 28 12-05-2007 02:39 AM

» Featured Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 06:48 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.