Distributed resources can't yet compete like traditional generators in U.S. power markets, but demand response products allow them a foot in the door.

Demand response programs are one way utilities are optimizing aggregated distributed energy resources.

Wholesale market changes and new regulatory frameworks are key to expanding the sector.

Unlike previous offers, Warren Buffett would preserve Oncor's corporate structure under Berkshire Hathaway ownership. But a well-heeled rival could complicate the sale again.

The Texas Municipal Power Agency says cheap natural gas and wind energy make it uneconomic to operate the plant except in the hottest months of the year.