Intel has invested $10 million in five companies that develop technologies to reduce electricity bills and greenhouse gas emissions in homes and data centres.

Intel Capital, the company's investment arm, has invested in companies that develop technology to enable active monitoring of electricity usage. It has also invested in companies that enable better demand and supply of energy to homes and data centres.

The investments were made by Intel as part of its Open Energy Initiative, which brings smart energy technologies to consumers, enterprises and utilities. Intel has already invested up to $100 million in the clean technology space, said Steve Eichenlaub, a managing director at Intel Capital.

Intel has invested in US companies including CPower, which focuses on smarter grids, Grid Net, which focuses on technology going into smart metres, iControl, which focuses on home automation, and Convey Computer, which enables on energy efficient high-performance computing. Intel Capital has also invested in Irish company Powervation, which focuses on digital power control.

Intel is also partnering with utilities on smart grid pilots, Eichenlaub said.