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07-28-2015, 05:00 AM
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#361
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Site Team
Join Date: Jul 2013
Posts: 5,426
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It is less about 12VDC vs 120VAC and more about traditional RV roof-units vs modern, efficient, quiet split units, with the condenser mounted outside. There are plenty of existence proofs of this technology, and they are used routinely in big rigs. I am quite sure that this is the future of RV AC. I don't know if 12V or 120V will prevail, but that is a minor point.
There is no need to be an apologist for ARV because they haven't tackled this problem yet. They are a tiny organization and they can't fight all battles at once. They or somebody else will soon introduce this technology and everybody else will quickly follow. The current B-van AC solutions are laughable and change is imminent. Personally, I can't wait. I don't really care who goes first.
__________________
Now: 2022 Fully-custom buildout (Ford Transit EcoBoost AWD)
Formerly: 2005 Airstream Interstate (Sprinter 2500 T1N)
2014 Great West Vans Legend SE (Sprinter 3500 NCV3 I4)
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07-28-2015, 04:47 PM
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#362
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Silver Member
Join Date: Apr 2015
Posts: 71
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Quote:
Originally Posted by avanti
It is less about 12VDC vs 120VAC and more about traditional RV roof-units vs modern, efficient, quiet split units, with the condenser mounted outside. There are plenty of existence proofs of this technology, and they are used routinely in big rigs. I am quite sure that this is the future of RV AC. I don't know if 12V or 120V will prevail, but that is a minor point.
There is no need to be an apologist for ARV because they haven't tackled this problem yet. They are a tiny organization and they can't fight all battles at once. They or somebody else will soon introduce this technology and everybody else will quickly follow. The current B-van AC solutions are laughable and change is imminent. Personally, I can't wait. I don't really care who goes first.
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"...modern, efficient, quiet split units, with the condenser mounted outside."
Can you post a link to this type of unit?
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07-28-2015, 04:55 PM
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#363
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Platinum Member
Join Date: Dec 2010
Posts: 2,058
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Quote:
Originally Posted by Nomad32
"...modern, efficient, quiet split units, with the condenser mounted outside."
Can you post a link to this type of unit?
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there are many of these both dc and ac. truckers use them mostly-why not google
sportsmobile sells one under DANHARD AC name
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07-28-2015, 06:33 PM
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#365
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Silver Member
Join Date: Apr 2015
Posts: 71
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Looks like Outside Vans uses a 12 volt A/C from the trucking industry. Will Roadtrek now switch to something like this or will it be the A/C placed under the chassis as hinted by RT Campksunk?
kingtec-ac01.jpg
kingtec-ac03.jpg
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07-28-2015, 06:39 PM
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#366
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Platinum Member
Join Date: Aug 2010
Location: Minnesota
Posts: 12,417
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Quote:
Originally Posted by Nomad32
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In the Amazon link it says 18 amps of DC? You can use almost that much charging your laptop. I wonder how many BTU continuous it will do.
OOps the 18 amps must be at 48 volts which is needs as a separate 8 battery bank so closer to 900 watts and more realistic, but still pretty low. A little of 1000 watts of solar, so you would need to have another charge method if you were to use the AC much, as the solar wouldn't take care of it by itself.
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07-28-2015, 06:59 PM
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#367
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Platinum Member
Join Date: May 2014
Location: Greer, South Carolina
Posts: 2,611
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In the 210P they are testing some kind of 12v split system in lieu of their 10,000 btu CoolKat window unit style AC.
I was surprised to hear this, as that window type unit is pretty low consumption - and there are others of similar size that are alot lower amperage.
I'd like to know what their reasoning is in this application as it's different that replacing a rooftop unit.
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07-28-2015, 07:03 PM
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#368
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Silver Member
Join Date: Apr 2015
Posts: 71
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Quote:
Originally Posted by wincrasher
In the 210P they are testing some kind of 12v split system in lieu of their 10,000 btu CoolKat window unit style AC.
I was surprised to hear this, as that window type unit is pretty low consumption - and there are others of similar size that are alot lower amperage.
I'd like to know what their reasoning is in this application as it's different that replacing a rooftop unit.
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Would this kind of split system work on the Zion as well?
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07-28-2015, 07:40 PM
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#369
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Platinum Member
Join Date: Dec 2010
Posts: 2,058
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Quote:
Originally Posted by Nomad32
Would this kind of split system work on the Zion as well?
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limited space under zion as is. if you keep the standard battery and move the tire to the back maybe
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07-28-2015, 07:53 PM
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#370
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Site Team
Join Date: Jul 2013
Posts: 5,426
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Dometic and Coleman both have lines of split systems intended for trucks. A company called "Big Rig Products" in OK City frequently have "lightly used" systems at good prices:
Dometic Truck AC Units
I could easily fit the inside part of such a system into a rear cabinet. Almost certainly MUCH quieter than those... THINGS we all have on our roofs. I am very tempted.
__________________
Now: 2022 Fully-custom buildout (Ford Transit EcoBoost AWD)
Formerly: 2005 Airstream Interstate (Sprinter 2500 T1N)
2014 Great West Vans Legend SE (Sprinter 3500 NCV3 I4)
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07-28-2015, 09:25 PM
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#371
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Silver Member
Join Date: Apr 2015
Posts: 71
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Quote:
Originally Posted by gerrym51
limited space under zion as is. if you keep the standard battery and move the tire to the back maybe
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Or just eliminate the spare tire altogether.
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07-29-2015, 03:05 AM
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#372
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Platinum Member
Join Date: Feb 2015
Location: Chaska MN
Posts: 1,769
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I could be confused, but I thought I read over on the Facebook page some talk of RTs with some sort of under the floor AC unit. I think the owner was having problems with it and the discussion got over my head so I didn't finish reading the thread.
__________________
2021 Promaster 1500 118wb conversion
2019 Roadtrek Simplicity SRT (almost a Zion)
2015 Roadtrek 170
2011 LTV Libero
2004 GWV Classic Supreme
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01-02-2017, 06:02 PM
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#373
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Bronze Member
Join Date: Oct 2016
Location: NY
Posts: 21
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Dragging up an old thread. Sorry.
My understanding is these etrek batteries use 60w when they are turned on.
Is this still true?
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01-02-2017, 06:31 PM
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#374
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Platinum Member
Join Date: May 2016
Location: East
Posts: 2,483
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Quote:
Originally Posted by dknightd
Dragging up an old thread. Sorry.
My understanding is these etrek batteries use 60w when they are turned on.
Is this still true?
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NO
The old ones did.
THey have updated the hardware/software.
The draw is much less now.
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01-02-2017, 06:40 PM
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#375
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Bronze Member
Join Date: Oct 2016
Location: NY
Posts: 21
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Do you have numbers? How much less? Thanks
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01-02-2017, 06:41 PM
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#376
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Platinum Member
Join Date: Aug 2007
Location: Minnesota
Posts: 5,967
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Quote:
Originally Posted by BBQ
NO
The old ones did.
THey have updated the hardware/software.
The draw is much less now.
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That's vague. What is the draw now?
__________________
Davydd
2021 Advanced RV 144 custom Sprinter
2015 Advanced RV Extended body Sprinter
2011 Great West Van Legend Sprinter
2005 Pleasure-way Plateau TS Sprinter
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01-08-2017, 09:26 PM
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#377
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Platinum Member
Join Date: May 2014
Location: Greer, South Carolina
Posts: 2,611
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Quote:
Originally Posted by Davydd
That's vague. What is the draw now?
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somewhere between 0 dots and 1 dots, I suppose... 
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01-08-2017, 11:22 PM
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#378
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Gold Member
Join Date: Oct 2011
Location: Key West, FL
Posts: 89
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I remember seeing a quote by Jim H claiming the new draw is "about 35 watts".
Need input from anyone with the newest version.
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01-09-2017, 01:26 AM
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#379
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Platinum Member
Join Date: Dec 2010
Posts: 2,058
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Quote:
Originally Posted by angelmroman
I remember seeing a quote by Jim H claiming the new draw is "about 35 watts".
Need input from anyone with the newest version.
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I don't dislike Jim but many of the thinks he says are incorrect or seemingly fictitious.
'About' could be ?
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01-09-2017, 01:27 AM
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#380
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Platinum Member
Join Date: Nov 2015
Location: CA
Posts: 1,668
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Quote:
Originally Posted by angelmroman
I remember seeing a quote by Jim H claiming the new draw is "about 35 watts".
Need input from anyone with the newest version.
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I have the more recent version but there is no way to measure the draw with the system as provided because the multiple battery management systems makes it impractical to install a shunt driven meter that measures the overall state of charge and operational and parasitic amperage draw.
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