By Rebecca Elliott

Tesla Inc. posted its first full-year profit, powered by record vehicle deliveries amid a global pandemic and growing demand for electric cars that is driving the company to pursue a sharp rise in output this year.

The Silicon Valley car maker said Wednesday it expects to increase production about 50% on average for the coming years -- and top that rate in 2021. The company delivered around half a million vehicles to customers last year, up more than a third from 2019 levels, even as world-wide auto sales plunged roughly 14%, according to researcher LMC Automotive.

Chief Executive Elon Musk last year suggested a delivery target of about 840,000 to one million vehicles in 2021. Wall Street's projection is for about 796,000 vehicles.

For 2020, Tesla reported a profit of $721 million on about $31.5 billion in sales, which compares with an $862 million loss and sales of $24.6 billion in 2019. The company topped Wall Street's revenue expectation of about $31.1 billion, according to FactSet, though missed profit estimates.

Tesla said its bottom line in the latest quarter was weighed down by a range of factors, including supply-chain costs and preparations to introduce updated versions of its Model S luxury sedan and Model X sport-utility vehicle.

Shares in the car maker slumped more than 6% in after-hours trading.

Tesla delivered quarterly profits during the pandemic despite the temporary shutdown of the company's lone U.S. car plant because of the health crisis. To manage the impact, Chief Executive Elon Musk battled with local authorities to reopen the factory, temporarily reduced salaries, furloughed workers and sought rent breaks. Later in the year, he tested positive for Covid-19.

The 17-year-old company's performance, coupled with wider investor enthusiasm about electric vehicles, sent the stock soaring more than 700% last year and turned Tesla into the world's most valuable auto maker. The string of quarterly profits also allowed it to secure a spot in the S&P 500 index.

Tesla generated a profit of $270 million in the fourth quarter, up from $105 million during the year-earlier period. Sales for the October through December period rose around 46% from the final three months of 2019 to roughly $10.7 billion.

Tesla's financial results have been buoyed by the sale of regulatory credits to rival auto makers that need them to comply with emissions-related rules. Such credits brought in roughly $1.6 billion last year, up from $594 million in 2019.

Tesla has benefited from growing electric-vehicle demand in China, where the company began delivering locally made vehicles in 2019. The company has expanded production capacity at its Shanghai facility and this month delivered its first made-in-China Model Y sport-utility vehicles.

But Tesla also faces increased competition from incumbent auto makers such as General Motors Co. and Ford Motor Co. and a fleet of startups that are developing their own plug-in models, including in China.

To support its growth, the company aims to open two new vehicle factories this year, one near Austin, Texas, and the other near Berlin, its first in Europe. The company reiterated those plans Wednesday and said that it would deliver its first semitrailer truck later this year. Mr. Musk said last year that the company hoped to begin delivering its electric pickup truck to customers toward the end of 2021.

To help sustain consumer appetite, the company said it is refreshing the Model S and Model X with new batteries and other enhancements with production to resume before April. Deliveries of those higher-end models fell 3% in the fourth quarter from the year-earlier period. Tesla said it has capacity at its plant in Fremont, Calif., to make 100,000 of those models, or 11% more than previously.

Tesla said it now has production capacity to make more than one million cars a year. It said its Shanghai plant could make 450,000 combined Model 3 and Model Y vehicles, or 200,000 more than it reported in the prior quarter.

Tesla's ascendancy from plucky startup to the world's most-valuable auto maker has been rocky at times. The company has often struggled to introduce new vehicles, such as the Model 3 compact car, and grappled with production challenges that have strained its finances.

Tesla also hasn't delivered on some of Mr. Musk's more grandiose promises, such as launching a robot taxi service by the end of 2020.

More recently, federal regulators this month asked Tesla to recall roughly 158,000 vehicles over touch-screen failures that can affect safety functions, including backup cameras. Tesla hasn't responded to a request for comment about whether it intends to follow through with the recall, which would be one of its largest safety actions to date.

Tesla has shored up its cash position recently by selling billions in new stock. Mr. Musk has said the company would use the funds to pay down debt and amass what he described as a war chest.

Write to Rebecca Elliott at rebecca.elliott@wsj.com

(END) Dow Jones Newswires

01-27-21 1719ET