The deal for ChargePoint could value the company at more than $2 billion (1.54 billion pounds) and be announced as early as next week, the sources said, cautioning that talks could still collapse and terms may still change.

The sources requested anonymity as the matter is private. ChargePoint declined to comment. Switchback did not immediately respond to requests for comment.

Switchback quickly rose 11% after the news and was halted. After trading resumed it was up 27.5% at $13.32. Trading volume was 8.4 times its 10-day moving average.

Campbell, California-based ChargePoint, founded in 2007, last month closed on a $127 million funding round which valued the company at $1.37 billion, according to PitchBook data.

ChargePoint has attracted funding from both private venture investors and large strategic investors, including German automakers Daimler AG and BMW and the venture arm of oil company Chevron Corp.

Switchback Energy is a special-purpose acquisition company (SPAC) which raised $300 million in an initial public offering in July 2019.

A SPAC is a shell company that uses IPO proceeds, together with debt, to acquire another company, typically within two years. Investors are not notified in advance what the SPAC will buy.

SPACs have emerged as a quick route to the stock market for companies, particularly auto technology startups, concerned about the risk of the lengthy IPO process. In some cases, these companies have also struggled to attract interest from institutional investors such as pension funds and venture capital firms.

Investors also seek to echo the surging stock price of Tesla Inc, the leading electric vehicle company.

Electric commercial truck maker Nikola Corp went public earlier this year through a SPAC merger while electric carmaker Fisker has agreed to a reverse merger with Spartan Energy Acquisition Corp.

By Joshua Franklin and Ben Klayman