Though still unofficial, it's come to our attention, that a Tesla Model S owner broke past the 400-mile barrier without stopping to recharge.  Is range no longer an issue for owners of Tesla's electric vehicles?  Or is this some type of media-grabbing publicity stunt?

Tweet away Elon Musk! This one is definitely brag-worthy.

Tweet away Elon Musk! This one is definitely brag-worthy.

Truth is that Elon Musk always believed that the 85-kWh version of the Model S was capable of breaking past the 400-mile single-charge mark and even previously challenged owners to shoot for that seemingly impossible target.

Model S owner David Metcalf and his son Adam set out on the roads of Florida to see whether the Model S could indeed break past the 400-mile mark.  David didn't call it quits at 400 miles.  Rather, the duo continued to urge the Model S' electric motor to keep whirring until the vehicle came to a temporary stop (it was eventually towed home for a 10-hour recharge) at 423.5 miles.

Upon completion of this extraordinary adventure, Mr. Metcalf received a call from Tesla vice-president George Blankenship.  Even the outspoken and impossibly busy Elon Musk, CEO of Tesla Motors, found time to post a tweet congratulating the range defying duo of David and Adam.

Over 400 miles! That's certainly a record breaker.

Over 400 miles! That's certainly a record breaker.

As we wait for the Guinness Book of World Records to officially verify the distance covered by this particular Model S—a time-consuming process that could take up to 2 months of evidence checking and precise distance calculations—we direct you to David's twitter feed for a wealth of additional information on this impressive feat.

via Green Car Reports