Most readers know that that “EVs” is probably an acronym for Electric Vehicles. Ditto BESS and Battery Energy Storage Systems. However, both of these markets need the same things: really big rechargeable batteries. A typical EV needs them so it can go long distances (preferably multiple hundreds of miles) without charging. A BESS needs them so it can help power a major load (ranging from a residence to a grid-segment) through multiple-hour peak demand periods. The synergy comes from using the same or similar batteries for each application.