SEIA

GE Energy Financial Services, part of General Electric (GE.N), said on Wednesday it bought a stake in a large U.S. solar power project for $100 million, bringing its investments in the sector to $1.4 billion in the last year.

Hundreds of start-ups are presenting advanced energy technologies at a Department of Energy conference this week. Their early-stage efforts are funded by a government grant program, called ARPA-e, but what happens next is a difficult question.

As governments around the world tinker over how best to support solar energy, a number of large corporations have thrown their weight behind the renewable resource. These moves could potentially shift the momentum driving the solar industry away from the public sector and onto private enterprise.

The Henderson County Detention Center, a 543-occupant detention facility, will cut hot water costs by 45 percent through the installation of a solar energy system from Asheville-based renewable energy firm SolTherm.

Two and half years ago, Steve Stewart erected a 100-foot windmill at his Barstow, California home. Stewart is no eco-crusader, but he does know a good deal when he hears it.