This document e-book aims to give an overview of the full process to specify, select, manufacture, test, ship and install a Battery Energy Storage System (BESS). . Quantifiable Deviations and Omissions: Any adjustments in Yearly Energy Throughput of the BESS that result from the procedures outlined below shall be added, for purposes of comparative evaluation only. It defines technical specifications, project requirements, and supplier expectations, ensuring you receive accurate and competitive proposals from vendors. A well-structured RFP minimizes. . The Rocky Mountain Institute (RMI) has been engaged by Saba Electric Company (SEC) as a Renewable Energy Client Engineering Consultant for the Saba Renewable Energy (RE) Phase 3 ground mount utility-scale solar + Batery Energy Storage System (BESS) Project, Giles Quarter, Saba. To better understand BESS costs, it's useful to look at the cost per kilowatt-hour (kWh) stored.