Tech entrepreneur Elon Musk earnt himself a neat US$4.5 billion (A$6.68 billion) overnight in just 15 minutes – and he didn't even have to lift a finger.

Axar.az reports citing foreign media that the Tesla founder and owner are riding on the success of his electric-car business, which has seen its share price more than double in 2020.

As Musk owns around 19 percent of Tesla's stock, his personal stake has added more than US$17b (A$25.24b) worth of value in the past month.

Traditionally plagued by production line errors and a haphazard move towards an automated vehicle production process, Elon Musk has been forced to defend his own promises of delivering Tesla Model 3s on time.