House Republicans want more information about a $400 million loan guarantee from the U.S. Energy Department to Abound Solar Inc., citing reports that significant “technological difficulties” with the company’s solar panels were known before the aid was approved.

Colorado-based Abound filed bankruptcy in July after ambitious plans to open solar-panel plants in Indiana and Colorado were undone by stiff competition from China. The company had hoped to hired as many as 1,200 people to work in the unused Getrag transmission plant in Tipton, north of Indianapolis.

Representative Fred Upton of Michigan, the chairman of the House Energy and Commerce Committee, and two other Republicans on the panel wrote Energy Secretary Steven Chu seeking documents his department used to review the application from Abound.

In the letter, Upton suggests Energy Department officials should have known about problems with the company’s solar panels prior to issuing the guarantee, which was part of the same program that financed Solyndra LLC. The Fremont, Calif., company also later failed.

An engineering report given to the department two months before it closed on the guarantee indicates that “Abound’s panels were already experiencing significant efficiency and technological difficulties,” the letter states.

One customer reported “major performance shortfalls” with Abound’s panels, the letter states, quoting the engineering report given the Energy Department.

The letter, which was dated Wednesday, continues Republican criticism of the $16 billion clean-energy loan program that was funded by the 2009 economic stimulus. Republican presidential candidate Mitt Romney has said President Barack Obama erred in directing the money to risky renewable-energy projects.

Administration officials have defended the program, saying the failure rate has been lower than anticipated by Congress.

Damien LaVera, an Energy Department spokesman, referred a request for comment about the investigation to an earlier blog posting on the Department’s website that cited allegations Chinese companies were unfairly undercutting market prices for solar panels, putting additional pressure on U.S. manufacturers.

“In such an intense competition and with the price declining 47 percent last year alone, not every company, nor every investment, will be a success—but America will be stronger and more competitive if we continue to support and build a thriving solar industry here at home,” LaVera wrote in the June 28 post.

In an e-mail, LaVera also said the department already had provided the committee engineering and market analyses of Abound’s loan application.

Abound borrowed about $70 million from the U.S. before the Energy Department stopped payments. The Energy Department has said taxpayers may lose $40 million to $60 million on the loan after Abound’s assets are sold and a bankruptcy proceeding concludes.

The company stopped operations in June, prompting more criticism from Republicans who had said Solyndra’s earlier failure after receiving a $535 million loan guarantee showed the problems of trying to pick “winners and losers” in the market.

Republican and Democrat lawmakers from Indiana also supported Abound’s loan.

Craig Witsoe, Abound’s chief executive officer when it closed, blamed “aggressive price-cutting from Chinese competitors” for the company’s collapse. Besides the $70 million from the government, Abound also attracted about $300 million in private investment.

The House Energy and Commerce Committee refused to release the engineering report allegedly showing early technical difficulties with Abound’s solar panels.