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Competing neck-and-neck with Microsoft for web-based home energy monitoring is Google. Its PowerMeter web application gives people a real-time read-out of electricity usage and, with the aid of a smart meter, can give details on what different 'plug loads' - appliances and electronics - use in a home.
Google says that it intends to expand the capabilities of PowerMeter over time to monitor gas and water, to potentially schedule electric vehicle charging and participate in utility demand response programmes.
Photo credit: Google