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 > Is there an Air Conditioner using Inverter Compressor

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Peter_Crowl

Alabama

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Posted: 05/12/22 10:43am Link  |  Quote  |  Print  |  Notify Moderator

I love the split systems that I have in my home.
Now that I have the roof on my 2000 Bounder 34T cleared for recovering I'm wondering if anybody makes an inverter system unit for RV's.
Searched around the net but came up empty.

CA Traveler

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Posted: 05/12/22 12:09pm Link  |  Quote  |  Print  |  Notify Moderator

If you mean one that runs on 12V DC inverted to 120V AC that would be rather inefficient vs a DC motor or just a AC motor.

A 120V 10A AC draw for a air conditioner would draw about 110A DC which would among other things require very large wires to the roof.


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Peter_Crowl

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Posted: 05/12/22 12:18pm Link  |  Quote  |  Print  |  Notify Moderator

CA Traveler wrote:

If you mean one that runs on 12V DC inverted to 120V AC that would be rather inefficient vs a DC motor or just a AC motor.

A 120V 10A AC draw for a air conditioner would draw about 110A DC which would among other things require very large wires to the roof.


No - one with an inverter compressor as used in a ductless split system. They are much more efficient. Rather than the compressor running on a start/stop basis - with the startups drawing the most current of the entire operation - they're a DC system that throttles the speed of the compressor to match the load. My residential units could run on the smallest Harbor Freight generator they offer.

JRscooby

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Posted: 05/12/22 12:55pm Link  |  Quote  |  Print  |  Notify Moderator

Some talk of running AC off a generator. Most suggest engine rotation spin coils to make 120V which spins coils to pump refrigerant. Others engine rotation spin coils to make 12V which spins coils to pump refrigerant. Why does nobody in the RV world even think about engine rotation pump refrigerant?

valhalla360

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Posted: 05/12/22 01:58pm Link  |  Quote  |  Print  |  Notify Moderator

Peter_Crowl wrote:


No - one with an inverter compressor as used in a ductless split system. They are much more efficient. Rather than the compressor running on a start/stop basis - with the startups drawing the most current of the entire operation - they're a DC system that throttles the speed of the compressor to match the load. My residential units could run on the smallest Harbor Freight generator they offer.


I've not seen an RV specific unit but in Kuwait, I've seen residential units mounted on the rear bumper. If you have room, you could put it on the A-frame at the front of the trailer.

I assume the trick would be finding a wall with no obstructions to mount the interior part of the unit. Running the lines between should be fairly straight forward.

I do like the idea of one less hole in the roof.


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way2roll

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Posted: 05/12/22 02:08pm Link  |  Quote  |  Print  |  Notify Moderator

You lost me at ductless. Mini splits are great for rooms or garages but when trying to cool an entire RV with different rooms I think they lose some appeal - at least for me. If I were doing a Sprinter conversion I would definitely consider it.


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time2roll

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Posted: 05/12/22 02:28pm Link  |  Quote  |  Print  |  Notify Moderator

There are ceiling cassette vents used with some split units in place of the more common wall mounted. The highest SEER rating seems to be 240v units.


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theoldwizard1

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Posted: 05/12/22 03:36pm Link  |  Quote  |  Print  |  Notify Moderator

Peter_Crowl wrote:

I love the split systems that I have in my home.
Now that I have the roof on my 2000 Bounder 34T cleared for recovering I'm wondering if anybody makes an inverter system unit for RV's.

There are some 12VDC or 24VDC A/C systems designed for trucks, but nothing in the RV specific market.

Some people have taken residential mini-split systems which do use inverter powered compressors and installed on RV. Not sure how well they would handle all of the bouncing around.

If you are a HVAC person, it would not be difficult to build your own. All of the parts are readily available.

You can of course run an A/C off of an inverter if you have a large enough one and sufficient battery power.

The big win on 12VDC compressors is that they actually use 3 phase AC motors. 3 phase motors are much more energy efficient than straight DC or single phase AC.

pianotuna

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Posted: 05/12/22 03:47pm Link  |  Quote  |  Print  |  Notify Moderator

Here are a few battery powered air conditioners. Fairly pricey.

https://www.nomadiccooling.com/?gclid=Cj........O1GMjaSCR2eba9xZzSOgYyTqhv0aAtbXEALw_wcB


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Slownsy

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Posted: 05/12/22 05:25pm Link  |  Quote  |  Print  |  Notify Moderator

Many people in Australia has installed the household inverter type revers cycle 240V air conditioning in there FW, and also now’s of one using the roof type cassette, not heard of any failure for several years. I and many others have also installed household 240V inverter refrigerator which runs of a 350-375W inverter.
Frank.


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