The purpose of the IOGP S-753 specification documents is to define a minimum common set of requirements for the procurement of battery energy storage systems (BESSs) in accordance with IEC TS 62933-3-1, Edition 1.0, 2018-08, Electrical energy storage (EES) systems – Part 3-1: Planning and performance assessment of electrical energy storage systems – General specification, for application in the petroleum and natural gas industries. The IOGP S-753 specification documents follow a common structure comprising a specification, also known as a technical requirements specification (TRS), a procurement data sheet (PDS), an information requirements specification (IRS) and a quality requirements specification (QRS). These four specification documents, together with the purchase order, define the overall technical specification for procurement