Common Motors mentioned on Thursday that it might undertake Tesla know-how to cost its electrical autos, together with promoting fashions that use the plugs pioneered by Tesla.

The announcement, two weeks after Ford struck a comparable settlement, is prone to make Tesla’s plugs the business customary and squeeze corporations which are racing to construct comparable networks as gross sales of electrical autos surge. The agreements imply that homeowners of Ford and G.M. autos will be capable of use Tesla chargers, which are sometimes the one ones out there in lots of locations and have a popularity for reliability.

“This actually nearly doubles entry to chargers” for G.M. prospects, Mary T. Barra, the automaker’s chief government, mentioned throughout a streamed Twitter conversation with Elon Musk, the chief government of Tesla and proprietor of Twitter.

Mr. Musk mentioned the deal “goes to be a basically great point for the development of E.V. adoption.”

However it might elevate issues that Tesla, which already dominates electrical automobile gross sales, may overwhelm opponents within the fast-growing charging enterprise.

Whereas G.M. will get entry to extra chargers, Tesla will earn a living from promoting vitality to homeowners of fashions made by different automakers. Tesla has been charging homeowners of these different automobiles greater charges than homeowners of its personal automobiles. The electrical automotive firm additionally must open up its community to qualify for among the $7.5 billion that the federal authorities is spending to hurry up the development of charging stations.

By adopting Tesla’s charging customary, Ford and G.M. additionally threat changing into depending on their most formidable competitor. Neither of the Michigan-based automakers sells wherever close to as many electrical automobiles as Tesla, and neither operates a charging community.

The settlement additionally has dangers for Tesla. The recognition of its automobiles has created congestion on the firm’s charging stations in some cities and alongside some highways. Tesla homeowners might turn out to be irritated that they’ll now need to queue with automobiles made by Ford and G.M.

“I don’t assume Tesla homeowners will probably be happy to look at a Ford Mustang Mach-E getting charged, whereas they wait in line,” mentioned Ben Rose, president of Battle Street Analysis, who follows the auto business.

The battle between Tesla’s charging plugs and those presently utilized by Ford, G.M. and different automakers recollects the competitors between Betamax and VHS video cassettes within the Eighties. VHS finally received the battle.

At one degree, the competitors between the requirements is a wonky technical difficulty with all sides claiming its plug is the higher alternative. But it surely may have long-lasting implications for the thousands and thousands of people who find themselves anticipated to modify to electrical autos within the coming years.

Tesla sells automobiles with a plug referred to as the North American Charging Customary. Ford, G.M. and most different carmakers have bought automobiles with plugs utilizing the Mixed Charging System plug. The 2 will not be suitable.

Quick chargers supplied by corporations like EVgo or Electrify America sometimes have each plugs and may cost Teslas in addition to automobiles from producers that use C.C.S., together with Mercedes-Benz, Volkswagen and Volvo. For many of its roughly 10-year historical past, Tesla’s community — which operates greater than half of the practically 30,000 quick chargers within the nation — was closed to automobiles from different producers, however the firm just lately started permitting different automobiles to make use of a few of its chargers.

Response from opponents was restrained on Thursday. “We assist all strikes to extend E.V. adoption,” Brendan Jones, the chief government of Blink Charging, mentioned in an e-mail. He added, “We’re monitoring the market intently and can regulate if we predict vital.”

Traders welcomed the deal. The share costs of Tesla and G.M. have been up about 3 % in prolonged buying and selling on Thursday.

This yr is shaping as much as be crucial to G.M.’s electrical automobile ambitions. The corporate is weeks away from providing a battery-powered model of its Chevrolet Silverado pickup truck. It additionally plans to introduce electrical iterations of the Blazer and Equinox sport utility autos.

Ford is working to speed up manufacturing of its electrical F-150 Lightning at a manufacturing facility in Dearborn, Mich.

Mr. Musk mentioned throughout the dialog with Ms. Barra that Tesla wouldn’t use its management of the nation’s largest charging community to drawback opponents. But when Tesla’s customary turns into dominant, different operators will probably be reliant on a competitor for data they should manufacture and set up charging networks.

Jonathan Levy, the chief industrial officer of EVgo, mentioned the corporate hoped that the North American customary “will probably be revealed in a means that suppliers throughout the business can have entry to ship extra charging choices for E.V. drivers.”

Starting in early 2024, homeowners of Ford and G.M. electrical autos will be capable of purchase adapters to connect with Tesla quick chargers. In 2025, each corporations plan to promote autos designed to make use of Tesla’s North American plug. House owners would wish an adapter to connect with C.C.S. chargers.

By teaming with an archrival, Ford and G.M. have conceded that they want Tesla’s community to promote electrical autos.

“Reliable, widespread public charging is a key driver to scaling the adoption of E.V.s,” Jim Farley, the chief government of Ford, mentioned in an e-mail when the corporate introduced its settlement with Tesla final month. “The Tesla Supercharger community has confirmed reliability and has already established charging corridors throughout the U.S. and Canada.”