AES is bidding on a 400MW battery storage system for a Long Island Power Authority (LIPA) request for new power. This project [is] an alternative to new generation on Long Island. It's a 1,600-megawatt-hour system providing operating reserve services."When we started in this business, it was unheard of to use lithium-ion," said John Zahurancik, the VP, Deployment and Operations, at AES Energy Storage. But that technology has become the go-to material. "Lithium-ion is understood and packaged," according to Zahurancik, "but we track over 100 technology companies at various levels of activity -- with a handful that we think are in the top tier." These include flow batteries, lithium-ion, and advanced lead acid batteries.