American electric vehicle (EV) maker Tesla has staged a significant turnaround by posting its best-ever quarterly production and delivery figures, with 447,450 vehicles manufactured and 497,077 cars delivered to customers globally between July and September – both new benchmarks for the brand.

The spike comes after the brand posted its largest quarterly sales decline in over a decade during the previous reporting period.

So on the same day that Tesla CEO Elon Musk was declared the world's first 'half trillionaire' – meaning his net worth is more than $US500 billion ($A758bn) – the automaker reported record quarterly sales of nearly half a million vehicles.

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This was in part thanks to strong sa

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