Show Caption Hide Caption What is a data center? Here's what you should knowData centers have been popping up all over Arizona. The massive sites have drawn economic praise and resident criticism. Here's what you need to know.Virtual power plants offer data centers a faster path to source power and, for participating households, potentially lower energy bills.Working together, Tesla, Sunrun and Renew Home will free up 16 gigawatts of energy on the grid nationwide through more efficient management of home energy use.Sunrun said its partners will use the fees collected from data centers to accelerate smart device deployment, which will…