50 days of 110F + and C-Max AC handles it with ease in full sun. AC load running around 1500 Watts once cabin cooled to setpoint temp. Turn set point temperature to minimum. Measure the temperature out of the center vent. Within a minute or so temp should be in the lower 40s F. If above 50F, there's an issue. Compressor is turned off if evaporator core reaches about 35.6 F.