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Tesla Roadster maintains high battery capacity over 100,000 miles

Many people are waiting for electric car technology to be more "proven" before they are willing to take that leap of faith and purchase an electrified vehicle. Well now, a new study into the battery performance of the Tesla Roadster (pictured) suggests that huge progress is being made.

Plug In America projects that Tesla Roadsters are able to maintain 80-85 per cent of battery capacity after being driven 100,000 miles.

Tesla Roadster Red

The findings surpass even Tesla's own initial projections of 2006: when it suggested 70 per cent capacity retention after 50,000 miles. In addition, Plug in America finds that the Roadster does not suffer any additional correlation relating to climate conditions.

The survey began in January this year and has taken data from around four per cent of Roadster owners worldwide, as well as anonymous data from an aftermarket vehicle monitoring system. It saw owners contacted via social media and asked to submit data about their vehicles: by July 05, 2013, 126 vehicles had contributed totalling 3,198,749 miles.

Of the Roadsters under the analysis, the average miles driven were over 25,000miles: with the highest being 87,111miles. Twenty three owners (18.9 per cent) reported that some or all of the battery pack had been replaced: from a single sheet to the entire battery pack.

In addition, Tesla lets owners look at an estimate of a battery pack's stored energy with a unit called "ideal range mile".

Projections from all the data gathered suggest that Tesla Roadster batteries will maintain around 80-85 per cent of capacity after 100,000 miles. What is also notable is that those surveyed are driving an average of 16,000 miles a year: well ahead of the national average for conventional vehicles of 13,500 miles a year.

In addition, Plug in America has launched studies into the plug-in battery performance of the Nissan LEAF EV; and the Toyota RAV4-EV.

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Paul Lucas

Filed under: Green cars, Electric cars, Tesla Motors

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