Good Sam Club Open Roads Forum: Mini Split Air Conditioner / Heat pump
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 > Mini Split Air Conditioner / Heat pump

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pianotuna

Regina, SK, Canada

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Posted: 01/03/18 06:56pm Link  |  Quote  |  Print  |  Notify Moderator

Walkdog,

Minisplits are often more efficient.

There are 48 volt DC air conditioners. Deep pockets needed, but it eliminates inverter losses that are 12% and up.


Regards, Don
Full Time in a 28 foot Class C, 256 watts solar, 556 amp hours of AGM in two battery banks 12 volt batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

Walkdog

Longview

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Posted: 01/03/18 07:25pm Link  |  Quote  |  Print  |  Notify Moderator

I'm looking at 24volt setup with my solar.

time2roll

Southern California

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Posted: 01/03/18 07:28pm Link  |  Quote  |  Print  |  Notify Moderator

Mini-Split with highest SEER rating is about the best shot you will have doing this. Still going to need close to 2000+ watts solar and probably a significant lithium battery.


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Walkdog

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Posted: 01/03/18 07:30pm Link  |  Quote  |  Print  |  Notify Moderator

I'm looking at Amps and dealing with battery. Mini split says say 10 amp. Is that 10 amh?

Walkdog

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Posted: 01/03/18 07:33pm Link  |  Quote  |  Print  |  Notify Moderator

Not have TT yet, but yes will put as much as needed up top for solar and one or 2 on the ground with lith batteries. I just need to figure out how many batteries I need. Way I see it so far 800amh is enough to run minisplit air all night long.

Just trying to work these numbers out and all as in for retirement here in a year or so

theoldwizard1

SE MI

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Posted: 01/03/18 07:37pm Link  |  Quote  |  Print  |  Notify Moderator

ScottG wrote:

For starters, they are extremely efficient so no one can fault them that way. Typically, the avg unit runs on 220VAC and requires a 15 amp breaker. Decent brands are amazingly quiet compared to our roof air units.

120V units exist, but are not common. Around 8,000 BTU.

They would be good for a "in-law bedroom" allowing that person to control their own room temperature.

Walkdog

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Posted: 01/03/18 07:38pm Link  |  Quote  |  Print  |  Notify Moderator

Honestly, I think most here no nothing of mini split air conditioners/heat pumps.

KD4UPL

Swoope, VA

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Posted: 01/03/18 07:41pm Link  |  Quote  |  Print  |  Notify Moderator

Walkdog wrote:

I'm looking at Amps and dealing with battery. Mini split says say 10 amp. Is that 10 amh?

First you need to know what voltage the mini-split operates at, it is likely 240v AC. If it is pulling 10 amps as you say that is 2,400 watts. Your inverter will likely only be 90% efficient so you will actually be drawing 2,667 watts from the batteries.You said you would be running this from an 800 AH 24 v battery, correct? That battery has a total capacity of 19,200 watt/hours. So, that bank would run this unit for 7 hours before being totally depleted. However, most battery AH ratings are given at a 20 hour rate. Capacity drops as you pull more current. If it's 800 AH at the 20 hour rate it may only be 500 at a 10 hour rate, it might only be 400 AH at a 2 hour rate; you'll have to look at the battery specifications. So, now it will only run your mini split for about 4.5 hours.
Most areas of the country receive enough sunlight on an average day to get the equivalent of full output from a solar array for about 4 hours. So, if you totally depleted a 19,200 watt/hour battery bank and needed to charge it back up in one day it would take about 4,800 watts of solar panels.

Walkdog

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Posted: 01/03/18 07:45pm Link  |  Quote  |  Print  |  Notify Moderator

Everything I can simply find on air units top units for RV do not readily state the amps per hour they use.

theoldwizard1

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Posted: 01/03/18 07:45pm Link  |  Quote  |  Print  |  Notify Moderator

48V DC Air Conditioner

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