This Practice Note discusses changes to financing structures for battery storage projects after the enactment of the Inflation Reduction Act. The Energy Transitions Commission estimated that achieving net-zero by 2050 would require an average annual investment of $3. 5 trillion globally between 2021 and 2050. Consequently, sustaining progress toward a zero-emission society necessitates access to huge sums of capital and the full leverage. This note explains the principal technologies used for energy storage solutions, with a particular focus on battery storage, and the role that energy storage plays in the renewable energy sector. It also describes a typical project finance structure used to finance energy storage projects and. A microgrid is defined by the DOE Microgrid Exchange Group as a group of interconnected loads and DERs within clearly defined electrical boundaries that acts as a single controllable entity with respect to the grid. This Note also discusses the fixed and variable revenue sources available to battery storage projects based on the benefits they offer to electricity. Co-authored by Harry Brunt, a partner in our Energy and Infrastructure team, and Dan Roberts of Frontier Economics Introduction In this article we consider the role and application of battery energy storage systems (BESSs) in supporting renewable energy power generation and transmission systems and. Battery energy storage systems (BESS) have emerged as critical infrastructure enabling renewable energy integration, grid stability, and peak capacity management.