But the huge federal investment has run headlong into the stubborn reality that the market for renewable energy products - and workers - remains in its infancy.
"Green energy investment has been a central talking point of the Obama administration's job growth strategy," said Samuel Sherraden, a policy analyst at the New America Foundation, a nonpartisan research organization. "It was a little bit too ambitious given the size and depth of the recession and the small size of the renewable energy industry."
Sherraden said it was unwise for the administration to invest so heavily in green energy, at least if short-term job creation was the goal. He said green energy comes with "political and market uncertainty" that has overwhelmed its job creation potential.
Despite that, Obama has described the surge of clean energy spending as crucial both to the nation's economic and environmental future.
"Our future as a nation depends on making sure that the jobs and industries of the 21st century take root here in America," Obama said in October.
"And there is perhaps no industry with more potential to create jobs now - and growth in the coming years - than clean energy." Read full at WP