Solar Air Conditioning Without Batteries

[fw12]

>>>A constant DC to DC conversion does not solve the main problem, which is developing an adequate source of POWER to do the job
I get your point. I still think a running super capacitor can take care of momentary spikes. That is what they're for.

>>>There are large surges that a super cap from wallmart cannot deal with, a real battery is needed
Again, large surges that last a few seconds shouldn't be a problem for a capable supercap.

>>>There already exist Heat Pumps (air conditioners) that may be directly powered from solar panels
I'll research that too. If the cost is justified, that is definitely the way to go.

It would be nice to experiment with this concept and see how it works out. Unfortunately for me, I live in condo community. No solar panels allowed. All that Las Vegas sun is wasted for me.

[bcroe]

There already exist Heat Pumps (air conditioners) that may be directly powered from
solar panels. So there is no need for all those wasteful intermediate steps. The newest
generation of HPs run off DC internally, which is inverted to drive variable speed AC
pumps and fans. Some adapt that to a solar connection. Typically they have an AC
line input to back up a shortage of panel power. The start surge problem goes away.

A constant DC to DC conversion does not solve the main problem, which is developing
an adequate source of POWER to do the job. Converters/inverters cannot do that. A
lot of extra panels can help.
Bruce Roe

[Mike90250]

a) yes

You forgot to factor system losses, which by my estimation would require about 3kw of panels & inverter and a minimal 48V battery bank of 200ah. There are large surges that a super cap from wallmart cannot deal with, a real battery is needed. And the system would only stay working in full bright sun, hazy or cloudy weather would impact the solar harvest. Batteries will carry it for a couple minutes but that's all

Opinions will vary, some may agree with you.

[fw12]

Is it a crazy idea to think of running Air conditioner (AC) on solar panels and inverter without batteries?

Let's say a 1.5hp AC unit, which equals 1.1kW.
If one throws 6x 300W panels at it, at 80% efficiency, that would produce 1.44kW

Voltage sag from cloud cover...
A DC-to-DC converter may help keep the solar panel voltage constant through out the day.
This one promises: 1,800W 40A, 10V-60V input to 12V-90V output

https://www.aliexpress.com/item/32857772579.html

Inverter:
A 2kW Inverter

The big question is the AC's start up power.
For that, I was thinking to get a super capacitor.
Would something like this serve? https://www.walmart.com/ip/Farad-Cap...tion/525590085

So the no-battery setup would look like this

Solar panels --> Dc-to-DC converter --> Inverter + Super capacitor --> Air conditioner

The initial cost would be high of course. But it should last long enough, without one paying any electricity charges.
Also, the setup can also serve to run other high power tools around, one at a time.