Mini Split Air Conditioner / Heat pump

Owel, i'll wait till i get my setup here in a year or two and run everything i want including air/heat off a 800ah lilthium battery bank. Hopefully 600ah lilthium battery bank but shall see. And that air/heat 24/7 with the right panels up top and at least one on the ground.

There are a few companies that manufacture 12VDC AC pumps. Typical they only sell the pump and it is up to the consumer to configure the rest of the system. (Not as difficult as it might sound).

One problem with DC motors is getting them to run efficiently at variable speed. AC motors are more efficient and have no brushes. They can be operated by a variable frequency motor controller to provide variable speed.

(Home inverter AC/heat pumps actually covert the incoming AC to DC and then feed that into a variable frequency motor controller. This way they can operate the motor at a lower speed when less cooling is required.)

I forgot where I seen it there is a 12volt mini split air conditioner, or at least at start up I think.

I'd like to say i'm sorry as in a lot of post but I think there is more here than most people are willing to look into. So i'm sorry for posting so much. I'm just trying to find that true answer and apparently there isn't as in mini splits arnt used much here in the USA

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

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.

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

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.

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

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