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3 tons

NV.

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Posted: 07/20/22 06:53pm Link  |  Quote  |  Print  |  Notify Moderator

FWIW, This is a bit anecdotal, but when I had my former two GC’s in series, I once tested the 11kbtu, 9.5a air cond concurrent with 300w solar and was keenly surprised that it ran for 1.5hrs, (compressor cycling at about a 2/3rds duty cycle) before getting to end of test at about 55% SOC…Different equipment, but just saying from experience…

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Gdetrailer

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Posted: 07/20/22 08:36pm Link  |  Quote  |  Print  |  Notify Moderator

wanderingbob wrote:

I got the generator , I was just curious ! Thanks !


No problem!

It is a very valid question, it does come up often since a lot of folks want to skip dealing with a gen and run from battery only.

There have been folks who have done this that have made it work, but they spent a lot of time, effort and money into making it work adding considerable battery and solar capacity. On the other hand, many also have tried and failed..

If you have the time to research and lots of money to spend, one can make pretty much anything battery powered but it does come with a cost..

Big heavy loads like A/C just seem to be better suited to be more economical to be run from a gen to keep the costs down..

pianotuna

Regina, SK, Canada

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Posted: 07/20/22 09:08pm Link  |  Quote  |  Print  |  Notify Moderator

Hi,

Magnum does not recommend powering the roof air with their 3000 watt hybrid inverter.

I'd go for a generator.


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp-hours of Telcom jars, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

3 tons

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Posted: 07/20/22 09:18pm Link  |  Quote  |  Print  |  Notify Moderator

pianotuna wrote:

Hi,

Magnum does not recommend powering the roof air with their 3000 watt hybrid inverter.

I'd go for a generator.


My 11 year old Xantrex ProSine PSW 2.0 2000w pass-thru runs the 9.5a 11kbtu Coleman regularly without a hitch, so it can depend on the various equipment…It’s in this particular regard that Victron has an outstanding reputation…JMO

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Skibane

San Antonio, TX

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Posted: 07/20/22 10:56pm Link  |  Quote  |  Print  |  Notify Moderator

Money, time and effort spent on equipment capable of running your large, inefficient roof air conditioner might be better spent on a smaller, more efficient air conditioner instead - like a mini-split, for example.

wanderingbob

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Posted: 07/21/22 06:34am Link  |  Quote  |  Print  |  Notify Moderator

Skibane , I have not been able to find a " split " that runs 110 volts !

Gdetrailer

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Posted: 07/21/22 08:09am Link  |  Quote  |  Print  |  Notify Moderator

wanderingbob wrote:

Skibane , I have not been able to find a " split " that runs 110 volts !


They are out there..

MR COOL 12K BTU

A "cool" $1600 also [emoticon]

One problem I see with MR Cool is they come with a 25ft sealed precharged line set that plugs or screws into the units.. On A RV it would get a bit clunky rolling up excess unneeded line.

HERE is a Amazon search for mini splits that run on 110V..

MNRon

Tennessee

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Posted: 07/21/22 09:50am Link  |  Quote  |  Print  |  Notify Moderator

As others have said, better to run heavy continuous loads like AC from a generator than from 12v through an inverter. 12v LA batteries which measure 12.7v fully charged will probably droop below 12.0v at full charge when pulling >100A, and be closer to 11.0v with that load when 50% SOC. Not to mention voltage drops and heat in the inverter. It *can* be done, but few will recommend it.


Ron & Pat
2022 F350 Lariat CCSB SRW Diesel
2019 VanLeigh Vilano 320 GK

2oldman

NM

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Posted: 07/21/22 12:09pm Link  |  Quote  |  Print  |  Notify Moderator

MNRon wrote:

As others have said, better to run heavy continuous loads like AC from a generator than from 12v through an inverter.
24v or higher would be better, but still, it's a heck of a wallop on batteries.

TechWriter

Part-Timing Again

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Posted: 07/21/22 12:19pm Link  |  Quote  |  Print  |  Notify Moderator

wanderingbob wrote:

Assuming that I have the battery power would a 3,000 watt inverter run a rooftop 13,500 air for an hour or so ?

Do you have a 30A or 50A system?


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