This federal cost share project demonstrates the benefits of the VOLTTRON platform for DER management through the testing of the VOLTTRON Testing Tool Kit. VOLTTRON is a US Department of Energy funded open source platform intended to provide a software base for integrating management of energy demand in buildings, distributed energy resources, and the electrical grid. The tool kit expands the VOLTTRON platform beyond its original set of developers and encourages adoption by other organizations and private entities. By lowering implementation costs and adding additional features such as simulation test suites and debugging tools, the tool kit promotes wider use of the VOLTTRON platform.