Founded in 2011 as a family-owned Maryland business, Mosaic Power turns residential electric water heaters into a virtual power plant by controlling when they use electricity. Its Whole Home Efficiency Network has regulated more than 20,000 water heaters across over 100 properties since 2014, responding to real-time conditions on the PJM grid while helping property owners earn revenue and detect equipment problems early. Mosaic is also developing applications for residential batteries and other grid services.