BEIJING-- Tesla Motors Inc. Chief Executive Elon Musk said Japan's Panasonic Corp. will likely be his company's partner in a planned $5 billion U.S. battery factory, and that the electric car maker would release details in two or three months.

"I would be surprised if Panasonic is not our partner," Mr. Musk said Tuesday on the sidelines of an event in Beijing to commemorate the first China delivery of its Model S electric car.

In an emailed statement, Panasonic said nothing has been decided at this stage, but added it will "look into a variety of options to strengthen" its relationship with Tesla.

In February, the Palo Alto, Calif., company said its proposed battery Gigafactory would cost up to $5 billion and allow it to sell as many as 500,000 vehicles a year. The proposed 10 million-square-foot facility would make the powerful and pricey lithium-ion batteries that power its Model S and future vehicles. Tesla has said it needs its own production to meet expected demand and hit its cost target for a more affordable car.

Mr. Musk said the company has shortlisted four states for the planned factory--Arizona, Nevada, New Mexico and Texas. The company would break ground at two separate locations to minimize the risk of delays, he said.

He also said he met with some customers in China who had expressed anger at delayed deliveries of their cars there. He said he apologized to them. "We've resolved this," he said.

Earlier, Tesla said it wouldn't ship to customers outside the major cities of Beijing and Shanghai until June because of a lack of service centers and charging considerations.

Mr. Musk said the company planned to invest hundreds of millions of dollars to build out a charging network in China.

Prices for the Model S electric vehicle in China start at $121,000.

China has set itself the ambitious goal of putting 500,000 plug-in hybrid and electric vehicles on the road by next year and five million by 2020. Beijing is hoping so-called green cars will help battle pollution and give a boost to Chinese auto makers by encouraging them to pioneer such vehicles. Such cars could also help reduce the country's dependency on imported oil.

Kana Inagaki in Tokyo contributed to this article.

Write to Colum Murphy at colum.murphy@wsj.com

Subscribe to WSJ: http://online.wsj.com?mod=djnwires

Tesla (NASDAQ:TSLA)
Historical Stock Chart
From Mar 2024 to Apr 2024 Click Here for more Tesla Charts.
Tesla (NASDAQ:TSLA)
Historical Stock Chart
From Apr 2023 to Apr 2024 Click Here for more Tesla Charts.