Google introduce “Google PowerMeter API” for developers interested in integrating with Google PowerMeter, to allow device manufacturers to build home energy monitoring devices that work with Google PowerMeter. “We're launching this API in order to help build the ecosystem of innovative developers working towards making energy information more widely available to consumers. This launch on code.google.com highlighting the core design principles towards integrating with Google PowerMeter. In particular we outline the underlying data model and the accompanying protocols to ensure that Google PowerMeter provides consumers access to their energy consumption with utmost care in maintaining the user's privacy and control on access to the information,” stated.
More info:Google PowerMeter API