Well, here is an update with the latest info:
First, I have never seen the A/C consume 5KW of power. The highest seen is 2.5KW which is 1/2 of the gauge on the car's display. However, if the A/C is run until the cabin temp is quite low and then the temp setting is increased then the heating element will turn on and increase the total power used up to 5KW as fomoto posted on 4/14. Is everyone seeing 5KW used by the A/C certain that all of the power is drawn by the compressor rather than some being drawn by the heating element?
Second, I took it in to dealer last week and they evacuated and recharged the system. It's been quite hot and the lowest temp I've seen at the center register is about 43 degrees F. which is better than prior readings were. Even after the system was recharged the maximum power draw I've seen is still about 2.5KW.
An update on the my A/C performance:
Yesterday my car soaked in direct sun and outside air temperature of 99 degrees for several hours. After a few minutes and a couple of blocks I parked and measured 39 degrees at the outlet air discharge. Driving off, I needed to turn the temperature up to the 70's and let the blower slow down in order not to freeze myself out.
My opinion is that if you can not get down to 40 degrees even in very hot conditions, your A/C system is not working properly.
Sure, the motor needs to be drawing the proper amount of power (and we certainly sem to have divided opinion here as to how much power that is, wiith myself favoring the lower of the posted opinion numbers), but that is not all you need. The refigeration system must be fully charged and working properly, and your blower must be running properly, and your evaporator and condenser coils must be clean, and your air delivery must be unobstructed. Also, your automatic controls and their temperature sensors must be working correctly.
Be cool !!!
Edited by Smiling Jack, 17 June 2014 - 10:37 AM.