The failed solar-panel maker, which is under numerous criminal and congressional investigations, ran so short of cash in December 2010 that it was unable to satisfy certain terms of its U.S. loan agreement, these people said. The agreement required Solyndra to provide $5 million in equity to a subsidiary building its factory but cash-flow problems prevented those payments…

Solyndra’s problems came to a head in November 2010 when it told the Energy Department it needed $150 million to make it through early 2012, at which time it believed its cash flow would improve. On Dec. 1, 2010, it was unable to make a $5 million payment to its subsidiary and technically defaulted on its loan.

The loan was officially restructured in February 2011, giving the company enough money to carry it through August. The company, which had drawn down $475 million of the U.S. loan as of Dec. 31, 2010, ended up borrowing $527 million before its bankruptcy.

Rep. Cliff Stearns of Florida, who is heading the Republican congressional investigation into the company, said, “Solyndra ran out of cash in December 2010, yet DOE continued to ignore the red flags and astonishingly doubled down on a bad bet and restructured the loan, further putting taxpayers at risk for what could now be a half billion dollars.”