The arrangement would cover exports from 90 of about 140 Chinese exporters that were examined during the investigation, and that represent 60 percent of the panels sold in Europe, the government official said. Those 90 companies would no longer face tariffs that were put in place in June. Chinese exporters that did not agree to the terms will still face tariffs that are set to rise to 47.6 percent on Aug. 6 from the current level of 11.8 percent, the official said.

The Chinese government hoped from the start of the trade case with the European Union for a negotiated settlement instead of a legal battle. This deal comes as a relief, said He Weiwen, the co-director of the China-United States-European Union Study Center at the China Association of International Trade in Beijing.

The European settlement with Beijing in some ways complicates a similar dispute between the United States and China. The United States Commerce Department imposed final anti-dumping and anti-subsidy tariffs last spring on imports of solar panels from China. China responded on July 18 that it was preparing to impose tariffs of more than 50 percent on polysilicon, the main material for solar panels, on imports from the United States and South Korea.

The United States began trying in early summer to arrange a comprehensive deal among Beijing, Brussels and Washington that would set new global trade arrangements for solar panels in exchange for the removal of the American tariffs and the preliminary European tariffs. But faced with a complex process in the United States for removing tariffs once the Commerce Department has made them final, the European Union pushed ahead with its own negotiations with China, a Senate aide with detailed knowledge of the issue said on Friday.

“The administration has been doing the right thing on this, pushing for talks and trying to get a joint settlement with Europe, but the Europeans have not had the same attitude and instead are pursuing talks with China independently of the U.S., which has stalled progress on U.S.-China talks,” said the aide, who spoke anonymously because of the diplomatic sensitivity of the issue.

The Office of the United States Trade Representative, which is part of the White House, had no immediate response to the European deal, which was announced shortly before dawn in Washington.

Solar panels represent more than 6 percent of China’s exports to the Continent, making them one of the largest Chinese exports to the European Union. In 2011, Chinese exports of panels and their main components to the European Union were worth about 21 billion euros or $27.4 billion.