This pilot focuses on the generation of electricity from solar array installations on domestic household roofs based on a family of products and services. The end-to-end security of the Smart Energy System (SES) is a key requirement. This applies to several general types of security requirements e.g., energy consumption/production data anonymity/integrity; privacy controls over accessibility; high dependability, availability and security of all the smart objects and components involved, etc. All these components will feature in the CTTP scenarios and programmes providing a comprehensive basis for evaluating the THREAT-ARREST approach. In particular, our expectation is that the SES pilot security requirements will cover test, monitoring and hybrid-based certification as well as provide scenarios and requirements for incremental and compositional certification.