The certificate for renewable energy storage system (RESS) by T?? S?? will enable stakeholders to demonstrate the safety and performance of these systems and improves transparency in this high-growth market. Certification is based on a comprehensive test standard that considers the requirements of all relevant standards applicable to stationary energy storage systems and their individual components, including IEC 62619, IEC 60068, IEC 62109-1, IEC 62109-2 and VDE-AR N 4105 or IEC 62477-1. The test standard includes checks of the mechanical, electrical and software-related design of the storage system, safety and environmental tests on the batteries, inverter tests for safety and network compliance, review of the product documentation for completeness and plausibility, and on-site inspection of ongoing large-scale production at the manufacturer's premises.