Well, ecars ARE simpler, mechanically. IC cars drive the A/C from a pulley on the motor. This means there is a path for high pressure refrigerant gases to the atmosphere. In variably in 2-3 years you lose gas == $$ for the dealers. ecars use a sealed system, like a home refrigeration unit = no gas leakage path. There is another cooling path for the batteries to get rid of the charge/discharge heat, this is another fully sealed fluid circulating system that only leaks in some accident