My air conditioner man would not let me buy a system with that electronic stuff. He said that I would not save any money in the long run because of the expensive repairs. He told me to get the most efficient unit without the fancy DC electronic stuff. I bought three units from him, about 4 years ago, no problems. Running 10 tons.
Wow 10 tons on a single unit?
That must be a huge building.
My HVAC guy steered me away from the multi speed motors and stuff like that for the same reason. We are doing just fine chugging along with a new American Standard Silver 2.5 ton unit. Single speed.