Sunpower, a US residential solar installer, has announced a Virtual Power Plant (VPP) spanning the eastern states of Massachusetts, Rhode Island, and Connecticut. The VPP will administer payments from utilities for the use of the VPPs stored electricity during peak hours. As with other VPPs in the US, participants receive notifications when their batteries are being drawn from and are always left with a minimum portion of their storage capacity; in this case customers will be able to determine the backup level they are left with. The two utilities involved are Eversource and National Grid, and their “VPP season” is from June until September. Sunpower is a mid-size US solar installer which added 13,000 customers in Q2 – it is…