Friday, 29 November 2019

The Driven/Bridie Schmidt: Tesla Model S busts EV myths with historic 1 million kilometres driven

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Tesla Model S busts EV myths with historic 1 million kilometres driven

1 million kilometre tesla
Source: @gem8mingen/Twitter
Tesla Model S owner Hansjörg Gemmingen has achieved what detractors of electric vehicles would say is impossible, breaking the one million kilometre mark in his P85 Model S electric sedan overnight (Australian time).
Gemmingen is, by his own account, not just an electric vehicle enthusiast: he wants to bust electric vehicle myths, such as the claim that they are not built to last or cannot cover vast distances.
“There is so much bashing, which I want to counteract,” the self-funded Gemmingen said to German automobile news site Automobile Woch.
And bust myths he has now done, crossing the 1 million kilometre mark under the watchful eyes of a representative from the Guinness Book of Records to ascertain if the milestone moment does in fact constitute a first by one electric vehicle.
On average, Gemmingen has driven around 600km a day over the 5 year period from when he acquired the Model S, which was previously a demo car, in 2014 with 30,000km on the clock.
It has not been all smooth driving, however. Built in 2013, the Model S is now onto its second battery and fourth motor.
It has been the fourth motor that has held up to the pressure of what at times has been 1,000 kilometre drives for days at a time, covering 680,000km – more than two-thirds of the total 1 million kilometres.
It’s second battery – for which Gemmingen says in a Youtube video prior to the historic moment (shared below) he had to wait six months, driving with a loan battery until Tesla could replace it with a replacement battery – has covered half of the distance at 500,000km, Gemmingen says.
While not quite a third of the distance that Tesla CEO and co-founder Elon Musk says its new battery technology (that it intends to put into production in 2020) will be able to handle, it is still impressive.
But neither did Gemmingen’s incredible feat break the bank. As one of the original Model S vehicles it is still valid for free Supercharging, and at home Gemmingen charges using energy generated by rooftop solar panels on his home.
“You do not have to be a millionaire to afford it,” he said in an interview with German Manager Magazin which covered details of his drive.
Repairs only cost him around 13,000 euros (around $A21,000), as the motors were swapped under warranty twice. The battery was also swapped once under warranty, while a replacement CPU and touchscreen display had to be replaced at a cost of 3,100 euros ($A5,044).
The longevity of the battery (which we note Gemmingen tells Manager Magazin was replaced under warranty at 290,000km) he attributes to meticulously keeping the battery’s state of charge between 20-80% except in the case of a long trip where he would charge it up to 90%.
“If you drop below 20 percent charge level, the first cells can come under low voltage with cold battery, and that reduces the life,” he was quoted as saying.

On the highway, he also looked after battery health by keeping between 110-120km/hr and was careful when accelerating: “…you should not exaggerate the change between acceleration and recuperation, because it generates a lot of waste heat, and this promotes the degeneration of the cells,” he was quoted as saying.

Gemmingen is also a stickler for using DC rapid charging only when necessary, further ensuring the eco-friendliness of his driving.
“Ecologically, it is nonsensical early in the evening to draw a lot of electricity, better in the middle of the night when the power consumption of people is the lowest,” he was quoted as saying.
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