replacement air conditioner

Hi,

I vote for the 240 volt inverter. Mini-Splits are the bomb!

Here is a 115 volt Mini Split.

https://www.homedepot.com/p/Pioneer-Low-Ambient-12-000-BTU-1-Ton-20-SEER-Ductless-Mini-Split-Wall-Mounted-Inverter-Air-Conditioner-with-Heat-Pump-110-120V-WYT012ALFI19RL/314096172

I would go with a 240 volt sine wave inverter dedicated to the mini.
I like separate components but get a combo unit for the 120v if you must.

Yes Victron makes inverters that can be connected to make 240/120 split phase service. I think in the end this would make it more complex.

as jformer said, 240 will make life more difficult when u can plug in.

You can get a 240 inverter of course too.

Mini-splits are really nice. I sure would love to have one. Running this off solar is huge, you know? Do you have enough roof space for the amount of panels that you will need? You also will need a big battery bank depending how long you want to run it, just in the middle of a sunny day, or overnight?

A small gas generator would run this easily, and gas will run it all night. Compared to solar, the small generator (inverter generator) would be more cost effective. Im sure you have looked into this though.

My 2200 inverter gen will run my inefficient 9200BTU roof AC for about 11 hours overnight on I think about 1 gallon (external tanks available). The AC compressor only runs maybe 10-15 mins total each hour.


from a site:
The Ryobi RYi2200 inverter generator is a gasoline (can use E10) powered generator which has a fuel tank capacity of 1 gallon. It provides only run time about 4 or up to 5 hours on one tank of gas at 50% load capacity and around 2.5 hours at full load.

Chewydog wrote:
I’m a little confused on what a victron auto transformer does. Does it only turn 120 into split phase 240 or does it also turn 12v into 240. Would I need a inverter to feed the auto transformer? If so it sounds like a lot of efficiency loss.

Thank you

First, the Autotransformer only deals with AC current. So yes, you will need an inverter - ideally for your whole rig.

Second, autotransformers are incredibly efficient - in the high 90s, up to 99%. You will find the overall system, with a quality inverter, far more efficient than the rooftop unit you are looking to replace.

Finally, it's by far the cleanest solution as it will allow you to run a 240V AC unit both disconnected, and when plugged in to single phase 120V electrical sources, directly from the source rather than always using your inverter.

I’m a little confused on what a victron auto transformer does. Does it only turn 120 into split phase 240 or does it also turn 12v into 240. Would I need a inverter to feed the auto transformer? If so it sounds like a lot of efficiency loss.

Thank you

In your case, I would use a Victron Autotransformer. You can wire them to step up 120V input to 240V split phase.

If wired inline after the load center and before the disconnect box, it will be used regardless of the power source. It also will have its own secondary breaker. No need to bother with a separate inverter, as long as your primary inverter has sufficient capacity.