Tesla, manufacturer of the $100,000+ Tesla Roadster electric sports car, announced that it has received $40 million in convertible debt financing. The company said it will use the funds to accelerate manufacturing of the Tesla Roadster.

“40 million is significantly more than we need,” said Elon Musk, Tesla Chairman, CEO and product architect. “However, the board, investors and I felt it was important to have significant cash reserves.”

Tesla said that it has delivered 50 cars so far and produces Roadsters at a rate of ten cars per week, rising to thirty cars per week early next year. According to the company, more than 1200 people have placed a deposit for the Roadster. The 2008 production run is sold out, but Tesla is still taking orders for the 2009 model year.

There was no additional information on the company’s second car, a four-door, five-passenger, electric luxury sedan that is scheduled for a 2011 debut.