On the outskirts of Brooklyn, in a neighborhood with a reputation for crime and urban blight, Enel is quietly running a microgrid whose lessons may one day sit at the center of its multi-billion-dollar global electricity empire.

A little more than a year ago, Enel X began operating a state-of-the-art microgrid combining solar panels, a fuel cell, and New York City’s largest lithium-ion battery system for the Marcus Garvey Apartments – a 625-unit complex in the low-income neighborhood of Brownsville.