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Old 03-08-2022, 03:17 PM   #1
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THOR #25538
Thor Hurricane house batts

I have a 2014 27k Thor hurricane.
I have 2 interstate batteries powering the house.
Last night after a week of being plugged in to shore power, I was off grid and the batts died. Nothing was on but the fridge and the heater. Oils T they last longer than a single evening? What can I do to extend my off grid survivability?
Thanks

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Old 03-08-2022, 03:19 PM   #2
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Model: 2021 Hurricane 34R
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Quote:
Originally Posted by GDTRFF View Post
I have a 2014 27k Thor hurricane.
I have 2 interstate batteries powering the house.
Last night after a week of being plugged in to shore power, I was off grid and the batts died. Nothing was on but the fridge and the heater. Oils T they last longer than a single evening? What can I do to extend my off grid survivability?
Thanks
The heater consumes a lot of power...
Cheapest way is to increase the number of batteries and buy AGM.
Look for VMax Tanks...
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Old 03-08-2022, 03:23 PM   #3
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THOR #25538
I had intended to install a third battery but was worried when these two couldn’t handle one night of warmth.
Is it normal to sap all the battery on one night of heat?
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Old 03-08-2022, 03:51 PM   #4
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Quote:
Originally Posted by GDTRFF View Post
I had intended to install a third battery but was worried when these two couldnít handle one night of warmth.
Is it normal to sap all the battery on one night of heat?
What heater are you using?
Hurricanes come usually with two group 27 batteries...
Those are 100ah at best which means you have a total of 200ah.
If you are using the furnace, that should draw 30A which means you will be drying up your batteries in lest than 7 hours without considering other loads....
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Old 03-08-2022, 06:35 PM   #5
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Originally Posted by GDTRFF View Post
I had intended to install a third battery but was worried when these two couldnít handle one night of warmth.
Is it normal to sap all the battery on one night of heat?
I need around 400 amps per night for heat, fridge, and misc. Coffee prior to generator time as well.

Changed to AGM to get that as the FLA would die around 5 AM when they were new
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Old 03-08-2022, 06:49 PM   #6
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Quote:
Originally Posted by GDTRFF View Post
I have a 2014 27k Thor hurricane.
I have 2 interstate batteries powering the house.
Last night after a week of being plugged in to shore power, I was off grid and the batts died. Nothing was on but the fridge and the heater. Oils T they last longer than a single evening? What can I do to extend my off grid survivability?
Thanks
Install a battery monitoring system so you know the actual state of charge of your batteries as well as DC current loads.

Once the system is installed do an extended load test of your batteries to see what their current health is.

This is what I installed in my ACE last year:

https://www.amazon.com/gp/product/B07RP5B5P7

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Old 03-08-2022, 10:16 PM   #7
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Quote:
Originally Posted by GDTRFF View Post
I have a 2014 27k Thor hurricane.
I have 2 interstate batteries powering the house.
Last night after a week of being plugged in to shore power, I was off grid and the batts died. Nothing was on but the fridge and the heater. Oils T they last longer than a single evening? What can I do to extend my off grid survivability?
Thanks
Original Batteries?

I have 4 AGM's in our Hurricane and we do well through the night with heat, frig and tvs.
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Old 03-08-2022, 11:07 PM   #8
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Quote:
Originally Posted by GDTRFF View Post
I have a 2014 27k Thor hurricane.
I have 2 interstate batteries powering the house.
Last night after a week of being plugged in to shore power, I was off grid and the batts died. Nothing was on but the fridge and the heater. Oils T they last longer than a single evening? What can I do to extend my off grid survivability?
Thanks
Do you have starting or deep cycle interstate batteries?
Deep cycle will run your RV much longer , here's a link to Interstate.

https://www.interstatebatteries.com/...s/rv-batteries
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Old 03-08-2022, 11:45 PM   #9
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GD,
Are your batteries 6 volt or 12 volt?
100 amp 6 volt in series is still only 100 amps.
100 amp 12 volt in parallel is 200 amp hours.
Furnace uses about 10 - 12 amps an hour.
Here are some examples attached.
Terry
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Old 03-08-2022, 11:50 PM   #10
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Quote:
Originally Posted by GDTRFF View Post
I had intended to install a third battery but was worried when these two couldnít handle one night of warmth.
Is it normal to sap all the battery on one night of heat?
I would also say that one night of heat in 45 degree overnight weather is not the same as one night of heat in 25 degree weather.
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Old 03-10-2022, 03:09 PM   #11
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Thanks everyone for all the great info
I installed a 3rd interstate deep cycle rv battery and last night they kept me warm and comfy with 2/3 power left this morning
Good thing cause it’s snowing
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Old 03-10-2022, 03:28 PM   #12
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Quote:
Originally Posted by RACarvalho View Post
The heater consumes a lot of power...
Cheapest way is to increase the number of batteries and buy AGM.
Look for VMax Tanks...
Same here did AGM
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Old 03-10-2022, 03:46 PM   #13
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When you the coach was plugged, was the use-storage switch in use?
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Old 03-13-2022, 03:26 AM   #14
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Quote:
Originally Posted by GDTRFF View Post
I had intended to install a third battery but was worried when these two couldnít handle one night of warmth.
Is it normal to sap all the battery on one night of heat?
No!!! Not normal at all. The fan takes very little power to run. May be time to replace your batteries or make sure they are charging during the day when you run the generator or the engine. I put a third battery in my Windsport 29m because I have a 12v fridge that I had JC Refrideration in Indiana upgrade for me and I LOVE IT!!!!! Needed more amp hours and the NAPA RV/Marine batteries, flooded did better than AGM's!!!!!
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Old 03-13-2022, 03:28 AM   #15
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Quote:
Originally Posted by RACarvalho View Post
What heater are you using?
Hurricanes come usually with two group 27 batteries...
Those are 100ah at best which means you have a total of 200ah.
If you are using the furnace, that should draw 30A which means you will be drying up your batteries in lest than 7 hours without considering other loads....
The heater is propane and the fan is 12v, it takes no powere at all from the batteries!!??
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Old 03-13-2022, 04:04 AM   #16
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Originally Posted by knucklehead View Post
No!!! Not normal at all. The fan takes very little power to run. May be time to replace your batteries or make sure they are charging during the day when you run the generator or the engine. I put a third battery in my Windsport 29m because I have a 12v fridge that I had JC Refrideration in Indiana upgrade for me and I LOVE IT!!!!! Needed more amp hours and the NAPA RV/Marine batteries, flooded did better than AGM's!!!!!
wow!! had tried 2 sets of group 27 and group 31 flooded and battery was low and could not even make coffee in the morning with inverter.

Switched to 2 vmax agm group 31 heater runs all night and can make 2 cups od coffee in the morning...
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Old 03-13-2022, 12:02 PM   #17
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The heater is propane and the fan is 12v, it takes no powere at all from the batteries!!??
What?

As already noted it will take more than battery to operate the 12v fan overnight during cold weather on a typical RV propane furnace

Takes about three batteries amps to opmy heating system overnight when below freezing
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