Commercial and industrial (C&I) battery energy storage systems (BESS) are increasingly being combined into regional fleets to provide decentralized services to utility customers and transmission and distribution (T&D) providers. These services are in addition to the behind-the-meter host services being provided onsite, which often include energy management and demand charge reduction. There are a growing number of fleet control manufacturers that have developed software and hardware to provide these services concurrently. DNV GL’s Jamie Daggett provides an overview of sample markets that have active participation by fleets of C&I BESS and future policy developments that could significantly expand these markets. He also details the major factors that should be considered when financing a fleet of C&I BESS, including O&M costs, useful life expectations, replacement reserve, revenue projections, and recoverable costs at end-of-life.