Three US government energy research labs have unveiled a sensor testing kit that fits in a suitcase and has the potential to save the US around 10% in its energy costs each year – around $5.1bn, and a whole load of carbon emissions. Aimed at smaller commercial buildings, which often can’t afford to hire in a specialist to diagnose their energy efficiency, the kit is a great example of Internet of Things (IoT) technology being used in energy efficiency and smart grid deployments. Jointly developed by the Lawrence Berkeley National Laboratory (LBNL), the Pacific Northwest National Laboratory (PNNL), and the Oak Ridge National Laboratory (ORNL), the Sensor Suitcase could apparently save a 25,000-square-foot office building around $3,500 a year. The…