Sandia National Laboratories and SunPower Corp. recently formalized an agreement to conduct research on integrating large-scale photovoltaic (PV) systems into the grid. By signing a Cooperative Research and Development Agreement, the organizations will leverage approximately $1 million of combined US Department of Energy and SunPower funding. Additionally, a consortium led by SunPower, which includes Sandia as a partner, was recently awarded a $1 million grant from the California Solar Initiative to improve modeling of high-penetration PV systems.