Had my car parked in the grass today for another round of Zaino application . Beautiful day--58°F, clear skies. Despite being parked in the grass unplugged for hours, whenever I knelt down to work low on the car or clean the wheels I heard what sounded like a compressor or fan noise. What was it? With the relatively moderate temperatures, why was it seemingly on all the time? I assume the car was not actively warming the pack while parked at 58°F, so what was I hearing? No wonder the S in its current firmware state is eating power!