IET EESS Code of Practice

The IET (Institution of Engineering and Technology) EESS (electrical energy storage systems) Code of Practice is an IET code of practice for fixed electrical energy storage systems, including battery systems used in homes and larger buildings. It gives practitioners guidance on specifying, designing, installing, commissioning, operating and maintaining EESS, including how systems are integrated into low voltage AC and DC electrical installations. It is guidance for practitioners, not a consumer certificate, MCS certification, DNO approval, product warranty, fire-risk assessment, grid-connection approval or proof that a specific battery installation is safe, compliant or correctly designed.