Homes Helping the Grid (IMAGE) DOE/Pacific Northwest National Laboratory Caption This diagram outlines the relationship between appliances, a connected home (CH) control system developed by PNNL, and the power grid. Testing has shown the control system can successfully connect four appliance types with the grid and control their electricity demand. Credit Graphic by Stephanie King | Pacific Northwest National Laboratory Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.