Electrical Energy Storage Systems (EESS) provide storage of electrical energy so that it can be used later. EESS may be installed for a variety of reasons, for example increasing the 'self-consumption' of buildings fitted with renewable energy systems; arbitrage services; ancillary services and providing a back-up or alternative power supply.

• Section 1: Introduction
• Section 2: Scope, purpose and use of this Code of Practice
• Section 3: EESS components and architectures
• Section 4: EESS operating states and applications
• Section 5: Batteries
• Section 6: Other EESS components
• Section 7: EESS safety and planning considerations
• Section 8: Specification of an EESS
• Section 9: Design of an EESS
• Section 10: Network connection and DNO approval
• Section 11: EESS Installation
• Section 12: EESS inspection and testing
• Section 13: EESS handover and documentation
• Section 14: EESS operation and maintenance
• Appendix A: Glossary
• Appendix B: References
• Appendix C: System labels and safety signs
• Appendix D: Standards
• Appendix E: DC arc flash risk assessment
• Appendix F: Frequently asked questions
• Appendix G: General example schematics