My setup is quite energy efficient, I run mat type cleaner (G3/T5) as I like the simplicity vs the wheeled and tracked cleaners.
I can get it going and working on 187 watts, and if I bump it to 250 I get great wall climbing and shallow end coverage and some skimming action with the T5, but I have a relatively small 20Kish uncomplicated kidney shaped pool.
Both of these units also respond well to the much higher flow when Im running solar and that means I can leave in and work and not worry about it needing an adjustment when the pump is at higher RPM to make the solar work more effectively.
My biggest problem I have with suction side cleaner is the reduced skimming.
So Ill run the cleaner a day or even a half a day or so a week then yank it out.
Polaris used to make a great product called the LCS that had its own skimmer, and with the skimmer taking some additional power I had a great working system on 350 watts that skimmed and cleaned the bottom continuously. I have lots of helicopter leaf debris influx and a few sed pods but nothing so large as to routinely clog my suction side cleaners.
All the cleaners with internal, or externally clamped storage bags (return powered polaris 360, I have friends with robots Ive tried ) let the ultra fine silt I get in my area right through.
UD