Small A/C

[campigloo]

I may be looking for something that doesn’t exist. I want a small, 5000 btu or less, roof mount ac. All I want to do is cool the bedroom. I want one that a 2000w generator will power.
Any ideas?
Thanks!

[Crabbypatty]

Running the ac off of genny is ok, provided that one is parked far away from neighboring campers. We dry camp alot and typically one is is next to another and their are restrictions to running a genny at night, not to mention being courteous.

[valhalla360]

afidel wrote:

valhalla360 wrote:

campigloo wrote:
CoolAir RTX 1000
Dometic

That's only about 4000btu and you now need to design and implement a 24v DC power system independent of your 12v system.

The 9000btu RV unit makes a lot more sense.

Only 8A @ 24V in eco mode, that is ~17A@12V with a 12V to 24V converter. DC to DC converters are very efficient and not very expensive, found a 40A output model for $120 on Amazon.

I didn't say it couldn't be done but it adds another layer of unneeded complexity.

[theoldwizard1]

I am a bit surprised that there are not more 12/24VDC compressor refrigerators and air conditioners as 12/24VDC brushless compressors have been around for a few years now. Danfoss (now owned by Secop, but I think they are still marketing under Danfoss) makes a wide range of compressors.

EDIT : Ooppss ! It seems that Secop has been purchased by Nidec who has also purchase Embraco from Whirlpool.

[afidel]

valhalla360 wrote:

campigloo wrote:
CoolAir RTX 1000
Dometic

That's only about 4000btu and you now need to design and implement a 24v DC power system independent of your 12v system.

The 9000btu RV unit makes a lot more sense.

Only 8A @ 24V in eco mode, that is ~17A@12V with a 12V to 24V converter. DC to DC converters are very efficient and not very expensive, found a 40A output model for $120 on Amazon.

[SoundGuy]

valhalla360 wrote:
According to the coleman site, it's only around 1200w, which a 2000w (1600w continuous) generator should be able to manage. The only issue is startup but there are capacitor systems that solve that issue.

A hard start cap such as the Supco SPP6 will only marginally improve A/C compressor start up and isn't anywhere near as effective as a soft start kit such as the Micro-Air Easy Start. If the OP is going to do this there's no point in using half a solution when a complete solution is readily available and is proven to work.

[colliehauler]

valhalla360 wrote:

campigloo wrote:
CoolAir RTX 1000
Dometic

That's only about 4000btu and you now need to design and implement a 24v DC power system independent of your 12v system.

The 9000btu RV unit makes a lot more sense.

That's what I thought as well. Plus a 9000 is already designed for the opening and usually there is already power there.

[valhalla360]

campigloo wrote:
CoolAir RTX 1000
Dometic

That's only about 4000btu and you now need to design and implement a 24v DC power system independent of your 12v system.

The 9000btu RV unit makes a lot more sense.

[valhalla360]

campigloo wrote:

time2roll wrote:
I assume a 9200 would run off a 2000 generator in most conditions.

I don’t know. 9200 btu would be ~ 2650W

According to the coleman site, it's only around 1200w, which a 2000w (1600w continuous) generator should be able to manage. The only issue is startup but there are capacitor systems that solve that issue.

Are you making the incorrect assumption that you convert the BTU/hr rating directly to watts to determine power required?

Air/con units move heat, they do not destroy heat. The result is an efficient air/con unit removes far more BTU of heat than the wattage it consumes.

[marcsbigfoot20b]

SoundGuy wrote:

time2roll wrote:
I assume a 9200 would run off a 2000 generator in most conditions.

campigloo wrote:
I don’t know. 9200 btu would be ~ 2650W

If successfully starting a roof mount A/C with a genset is the issue then the better solution would be a 13,500 BTU A/C equipped with a Micro-Air Easy Start Soft Starter Kit powered with the new Honda EU2200i which is significantly more powerful than it's 2K predecessor or indeed any 2K inverter genset currently available. If the OP felt a 9200 BTU A/C would be sufficient the EU2200i would just laugh at the task. 😛

I agree, because I have that exact combo setup, and it works. I have tested at 107 degrees and also at 7500 ft and it starts both in ECO.

[mobeewan]

X

[mobeewan]

campigloo wrote:
CoolAir RTX 1000
Dometic

Is the Dometic even available in the US. So far all I see is pricing in British pounds and Australian dollars and it's not a pretty sight.

Over 1600 British pounds and over 2300 Australian dollars.

[SoundGuy]

time2roll wrote:
I assume a 9200 would run off a 2000 generator in most conditions.

campigloo wrote:
I don’t know. 9200 btu would be ~ 2650W

If successfully starting a roof mount A/C with a genset is the issue then the better solution would be a 13,500 BTU A/C equipped with a Micro-Air Easy Start Soft Starter Kit powered with the new Honda EU2200i which is significantly more powerful than it's 2K predecessor or indeed any 2K inverter genset currently available. If the OP felt a 9200 BTU A/C would be sufficient the EU2200i would just laugh at the task. 😛

[time2roll]

A/C does not make cold but rather moves heat. Check the amp rating.

https://www.airxcel.com/coleman-mach/products/air-conditioners/medium-profile/mach-3-p-s

[campigloo]

time2roll wrote:
I assume a 9200 would run off a 2000 generator in most conditions.

I don’t know. 9200 btu would be ~ 2650W