Tesla Motors has maintained that the most recent fire involving one of its Model S electric vehicles isn't the result of a vehicle or battery malfunction, but the company is still addressing the situation with a software fix, according to Green Car Reports. The California-based automaker has added a software function that automatically reduces the charge current by about 25 percent when power from the charging source fluctuates outside of a certain range, Green Car Reports says, citing the Twitter feed from an Apple employee, @ddenboer, who owns a Model S. You can read the text of the update below.

Last month's fire in an Irvine, CA, garage was the fourth involving a Tesla this year. The company cited an investigation by the Orange County Fire Authority and said the incident was caused by a wall-charging system that overheated and not by the luxury sedan itself. Meanwhile, the National Highway Traffic Safety Administration (NHTSA) continues to take a closer look at the other three Tesla fires, all of which took place during the fall. Two of the fires - one in Tennessee and another near Seattle - were caused by metal debris in the road that struck the bottom of car and hit the car's battery with such great force that the battery was punctured.
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Automatic Charge Current Reduction

If the Model S onboard charging system detects unexpected fluctuations in the input power to the vehicle, it will automatically reduce the charging current by 25%. For example, this will reduce a 40 amp charge rate to 30 amps.

This charge is designed to help protect you even when a problem exists that is outside of the car or charging electronics. It should significantly increase robustness and safety in the unlikely situation that a home wiring system, receptacle, adapter or cord is unable to meet its rated current capacity.


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