Doubting Thomases on whether solar aircon works or not

This is to be posed to our supplier. There are those who observe that solar aircon does not work.

One such person is Mr. N Bartolome who installed the solar aircon himself.  He bought one unit from China and installed it himself. The savings he observed were not that much.  Maybe it had something to do with the installation.  JUS co mentioned similar problems when the owner did not utilize their installer.  Maybe they earn extra on the installation.  Mr. Bartolome thinks that many Chinese manufacturers make product, and they copy from one another even if technology has not been proven.  He says that what really works is solar assisted with VDC inverter 48 volts.  But then again it is expensive.