This Stem eBook shows how developers, asset owners, and independent power producers can leverage a modular approach to. This Stem eBook shows how developers, asset owners, and independent power producers can leverage a modular approach to. ers lay out low-voltage power distribution and conversion for a b de ion – and energy and assets monitoring – for a utility-scale battery energy storage system entation to perform the necessary actions to adapt this reference design for the project requirements. ABB can provide support during all. . For larger utility scale projects, sourcing modularized battery energy storage system (BESS) hardware and control solutions from various vendors ofers potential advantages compared to the legacy integrated approach. Unlike residential or commercial-scale storage, utility-scale systems operate at multi-megawatt (MW) and multi-megawatt-hour (MWh) levels, delivering grid-level flexibility, reliability, and. . When Tesla unveiled its next-generation energy storage systems—Megapack 3 and the new Megablock—on September 15, 2025, it marked a pivotal moment in the evolution of utility-scale battery energy storage.