News in brief from around the world in energy storage, this time from the USA.

A residential virtual power plant (VPP) programme in Maryland has received regulatory approvals, enabling a partnership between technology provider Sunverge and utility Delmarva Power to get started on the project.

Nuclear generation company Exelon and chemical company Albemarle, which has lithium mining facilities, are investigating opportunities in the energy storage space, having partnered with battery energy storage investor Volta Energy Technologies to do so.