Enel’s eMotorWerks has unveiled a 30 MW battery that is comprised of its electric vehicle (EV) charging points and the cars they hook up to. Essentially, this is eMotorWerks, on behalf of other aggregation stakeholders, throwing down the gauntlet to prove that you can group together EVs to act as a grid-scale battery asset. The battery, a virtualized unit deployed since the start of 2017, has a 70 mWh capacity, and is managed by the company’s JuiceNet cloud system – acting as the Battery Management System (BMS). The unit is participating in the California Independent System Operator (CAISO) market, a way to purchase battery capacity in a wholesale day-ahead fashion. Broadly, a utility could both buy energy from this kind…