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Old 10-04-2016, 01:57 PM   #1
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Running LP furnace 1 night on 1 battery

We are spending the month of Nov. at Myrtle Beach Travel Park. We live in Quebec and plan on spending 2 nights on the road with our FR Surveyor SV210 trailer and would like to stay at Walmarts. On the way home, we will probably be staying in southern New York state (begining of Dec.) Temperature could easily be in the low 30's or high 20's overnight. Can I run my LP furnace plus 1 light plus the TV on my single battery ? (battery is 1 1/2 years old)
Also, if the answer is yes, will my tow vehicle charge the Trailer battery once we are on the road?
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Old 10-04-2016, 02:14 PM   #2
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Can I run my LP furnace plus 1 light plus the TV on my single battery ? (battery is 1 1/2 years old)
Also, if the answer is yes, will my tow vehicle charge the Trailer battery once we are on the road?
You can run your furnace on one battery if you set the thermostat to its lowest setting. One light? Certainly. You'll cut it off before going to bed, right? Your TV is out of the question unless you have a 12V telly. The tow vehicle charging circuit is designed to maintain a charged battery. It may not replace all the voltage you used running your furnace overnight.
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Old 10-04-2016, 06:02 PM   #3
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We are spending the month of Nov. at Myrtle Beach Travel Park. We live in Quebec and plan on spending 2 nights on the road with our FR Surveyor SV210 trailer and would like to stay at Walmarts. On the way home, we will probably be staying in southern New York state (begining of Dec.) Temperature could easily be in the low 30's or high 20's overnight. Can I run my LP furnace plus 1 light plus the TV on my single battery ? (battery is 1 1/2 years old)
Also, if the answer is yes, will my tow vehicle charge the Trailer battery once we are on the road?

Your battery better have a lot of amps because a furnace is a hog on a battery. In the cold the battery suffers from the cold, it has less power when its cold. Your battery will not charge up hardly any running down the road , turn your vehicle lights on and you may get a little more power to the battery. I would suggest that you add another battery


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Old 10-04-2016, 09:08 PM   #4
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It will completely discharge your battery which may permanently damage it meaning it won't be able to hold as much/full charge as before.

An inverter generator will be very quiet and should be considered as a good alternative or you can buy another battery or get a pair of 132 amp-hour golf cart batteries from samsclub.
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Old 10-04-2016, 10:00 PM   #5
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If your battery is nearly depleted the in-rush of current when you first connect to your tow vehicle could blow the fuse for the 12v trailer circuit in your tow vehicle. And if that happens and you're not aware of it then you may find your ice cream is melted when you stop for the night. Don't ask me how i know.
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Old 10-05-2016, 05:56 AM   #6
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I don't think it will make it through the night. On my last TH the furnace would run both group 27 batteries down to the point the gen would not start in the a.m. without a boost. This was a well insulated 31ft FW, temps were low to mid twenties, thermostat set to 60. The cold also takes a little bit out of the battery.
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Old 10-05-2016, 06:04 AM   #7
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Thank you for all the responses...even if I don't particularly like the general answers!!!
I now will be looking for a campground that may be open end of Nov. If all else fails, we can get a motel, like regular folk would do.
The Forest River Forum Website should be added to the Identification tag of every RV sold...it is as important as weight capacity info etc.
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Old 10-05-2016, 07:08 AM   #8
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For the price of the motel rooms, you could get a small inverter generator to run through the night.... problem solved and batteries will stay charged. I have one in the bed of my truck for just such occasions.
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Old 10-05-2016, 09:09 AM   #9
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You could also buy a gas buddy and not run the furnace at all and turn the gas buddy off when you go to bed and carry some extra blankets. I'm kinda cheap myself. If you buy a new battery then you will have two 1 1/2 year old batteries


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Old 10-05-2016, 12:38 PM   #10
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Forget Walmart!! Spend the money and spend the one night at a proper campground, KOA's are right on the major highways, on again, off again! Plug in to their electric and be stress free
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Old 10-05-2016, 01:23 PM   #11
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Furnace cut-out voltage

If your battery drops a little below 12 volts, a safety device in the furnace will kick in and the furnace will not operate.

This usually occurs about 3:00 in the morning!!!

You need 2 matching (new) batteries to make it thru the night.
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Old 10-05-2016, 01:56 PM   #12
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You could also buy a gas buddy and not run the furnace at all and turn the gas buddy off when you go to bed and carry some extra blankets. I'm kinda cheap myself. If you buy a new battery then you will have two 1 1/2 year old batteries


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I think you mean a Mr Buddy propane heater.
Gas Buddy is an app for finding cheap fuel prices.
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Old 10-05-2016, 02:12 PM   #13
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I think you mean a Mr Buddy propane heater.
Gas Buddy is an app for finding cheap fuel prices.

You are right it's Mr Buddy. I never stay at Walmart. I find a campground close by the route I'm traveling and stay there. DW doesn't like to wake up cold


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Old 10-05-2016, 02:35 PM   #14
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And, if the temps drop to freezing you might need to winterize.
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Old 10-05-2016, 03:50 PM   #15
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Originally Posted by Barry1 View Post
We are spending the month of Nov. at Myrtle Beach Travel Park. We live in Quebec and plan on spending 2 nights on the road with our FR Surveyor SV210 trailer and would like to stay at Walmarts. On the way home, we will probably be staying in southern New York state (begining of Dec.) Temperature could easily be in the low 30's or high 20's overnight. Can I run my LP furnace plus 1 light plus the TV on my single battery ? (battery is 1 1/2 years old)
Also, if the answer is yes, will my tow vehicle charge the Trailer battery once we are on the road?
You should have two batteries and even better a small generator if you want to run your furnace more than one night. The furnace motor or any motors really sucks the juice.
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Old 10-05-2016, 09:09 PM   #16
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If your "one" battery goes dead, it will sound your CO2 detector. That's the las t thing you want to heat in the middle of the night.
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Old 10-05-2016, 09:17 PM   #17
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My 2 cents. If you envision more such winter camping events in the future, it would probably be cost effective to invest in the two 6 volt golf cart batteries and a 2000 watt inverter generator.

I don't mind paying for a camp site with electricity, but they are nowhere as handy as a Walmart lot. I really like the ability to just pull off the road whenever and wherever I like and set up for the night.
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Old 10-05-2016, 09:32 PM   #18
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We must be the luckiest people around, we stayed overnight in a rest area in January in the mountains of NC/TN, no, not as cold as NY, but we had no problem with the heat or battery.
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Old 10-05-2016, 09:57 PM   #19
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Crack the window and the GasBuddy is the Answer for us.
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Old 10-05-2016, 09:57 PM   #20
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DW and I always stay in campgrounds, we have stayed at one Walmart one night. We didn't feel safe. I am set up to dry camp and we camp at campgrounds that doesn't have full hookups. I have two banks of four six volt batteries plus two Honda's, each 2000i


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