Tesla co-founder Martin Eberhard has never been one to mince words
about the company or car he helped create, and it doesn't look like that's about to change, with him now taking advantage of his blog to spread the word about "one little thing wrong" with the car. Apparently, like some other Tesla drivers, he noticed that the ESS coolant pump seemed to be running all the time, even when it had been parked and left off for a long time. After a bit more investigation, Eberhard determined that the coolant pump and support electronics drew a hefty 14 kilowatt-hours in four days just sitting in his garage, which translates to 1,278 kWh per year, or the rough equivalent of two large refridgerators. As Eberhard points out, that could also have some pretty severe implications for the life of the pump and battery, and even the car's stated watt-hours per mile. For Tesla's part, it says the pump will shut off, but only when the battery is half-way discharged, which is a state that some with a short commute, like Eberhard, may rarely see.