Regenerative refers to something that has the ability or power to regrow, repair, restore, or replace lost or damaged parts. It can also describe a process in which energy is recovered and returned to the grid, often through the use of storage systems like batteries or flywheels. In this context, "regenerative" refers to the ability of renewable energy sources such as solar panels or wind turbines to generate electricity while simultaneously regulating the power grid by absorbing excess energy and releasing it when needed.