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02-15-2023, 05:29 AM
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#1
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New Member
Join Date: Sep 2022
Location: Tennessee
Posts: 2
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1995 road trek 190 heater fan
So I was wondering if there was any means of replacing the internal fan with a more power efficient one. The one that is currently in it draws a ton of power and uses up a lot of my 200 ah lithium bank.
We have solar, but in winter if it’s overcast, It can only go a couple days before I get a low power disconnect from my bms.
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02-15-2023, 03:10 PM
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#2
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Platinum Member
Join Date: Dec 2016
Location: America's Seaplane City, FL
Posts: 1,000
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Pretty much nothing available, assuming a Suburban furnace which is what I assume you're asking about.
The furnace draw, IIRC, is under 4 amps. This should not kill 200 AHs of fully charged lithium batteries unless you are using a lot of power elsewhere. 12 volt fridge? Incandescent lighting? Starlink? CPAP?
Do you have a shunt based battery monitor? pretty much required with a lithium setup and highly desired for lead acid batteries.
Some folks use a catalytic heater, with proper precautions. I'm not a fan.
__________________
Tick tock, baby(Ironbuttal)
2000 Roadtrek Chevy 200 Versatile(sold)
'98 Safari Trek 2480
Just for fun:'15 Kawasaki Versys650LT
Perfection is a fantasy, though improvement is possible(Wifey).
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02-15-2023, 04:00 PM
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#3
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Platinum Member
Join Date: Nov 2014
Location: PHX, AZ
Posts: 2,660
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as a first step I'd check that the airflow through the furnace is unobstructed and that the furnace is working efficiently- that would reduce it's duty cycle and power draw. those wasps like to build nests inside those exterior vents, dragging mud and leaf litter in with them
__________________
Mike
2006 Pleasure Way Lexor TD on a Chev 3500
Previous: tent strapped to Electra-Glide
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02-15-2023, 05:27 PM
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#4
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New Member
Join Date: Sep 2022
Location: Tennessee
Posts: 2
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Quote:
Originally Posted by SteveJ
Pretty much nothing available, assuming a Suburban furnace which is what I assume you're asking about.
The furnace draw, IIRC, is under 4 amps. This should not kill 200 AHs of fully charged lithium batteries unless you are using a lot of power elsewhere. 12 volt fridge? Incandescent lighting? Starlink? CPAP?
Do you have a shunt based battery monitor? pretty much required with a lithium setup and highly desired for lead acid batteries.
Some folks use a catalytic heater, with proper precautions. I'm not a fan.
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This is very detailed information. Thank you so much for taking the time, both of you! The fridge stays on propane (it draws the battery down in one night), all lights are switched to LED bulbs, nope, and nope.
Quote:
Originally Posted by mkguitar
as a first step I'd check that the airflow through the furnace is unobstructed and that the furnace is working efficiently- that would reduce it's duty cycle and power draw. those wasps like to build nests inside those exterior vents, dragging mud and leaf litter in with them
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This is a great thought, I will check this immediately and let yall know.
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02-15-2023, 06:00 PM
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#5
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Platinum Member
Join Date: Dec 2016
Location: America's Seaplane City, FL
Posts: 1,000
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Quote:
Originally Posted by FRee
The fridge stays on propane (it draws the battery down in one night), all lights are switched to LED bulbs, nope, and nope.
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something is really not right. Pretty much to impossible to trouble shoot without a battery monitor. For $45 you can eliminate a lot of head scratching and frustration. Without data pretty much everything is just guessing. The monitor will give you data.
https://smile.amazon.com/gp/product/...?ie=UTF8&psc=1
Good luck.
__________________
Tick tock, baby(Ironbuttal)
2000 Roadtrek Chevy 200 Versatile(sold)
'98 Safari Trek 2480
Just for fun:'15 Kawasaki Versys650LT
Perfection is a fantasy, though improvement is possible(Wifey).
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02-15-2023, 07:45 PM
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#6
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Platinum Member
Join Date: Aug 2010
Location: Minnesota
Posts: 12,410
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Before getting too deeply on the total power use causes, I think the OP needs to determine his duty cycle heating. At 100% duty cycle you could use nearly 200ah in two days just in the furnace. It would have to be severely underfired to do that, though, as the 16000btu is overkill for our little vans.
IIRC the Suburban in our 07 will only use about 10ah of power per day at 40*F
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02-15-2023, 09:35 PM
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#7
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Platinum Member
Join Date: Dec 2015
Location: Arizona, Tempe
Posts: 1,697
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Find a better way to charge your batteries. A generator will charge 200AH of lithium in little time.
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