Optimizing self-consumption of locally generated electricity

What does service E-4 involve?

Service E-4 concerns the use of electricity that a building generates itself, for example with solar panels. The service measures the extent to which a building automatically aligns this consumption with the moment when renewable energy is available.

The Smart Readiness Indicator (SRI) assesses this service within the Electricity domain, one of nine domains in which the methodology divides building technology.

What levels does the methodology distinguish?

The SRI has four functionality levels for E-4, ranging from 0 to 3. Each level describes a step in the degree of automation.

• Level 0: no control of self-generated electricity consumption.
• Level 1: time-based scheduling, for example for power outlets and household appliances.
• Level 2: automated management based on current renewable energy availability.
• Level 3: automated management based on both current and predicted energy demand and availability.

A higher level means the building management system (BMS) can switch independently based on current and predicted data, rather than on a fixed schedule.

How does E-4 count towards the score?

E-4 is assessed only through method B, the comprehensive version of the SRI methodology with 54 smart-ready services. Method A, the simplified version with 27 services, does not include this service.

Each service is tested against seven impact criteria, such as energy efficiency and flexibility for the electricity grid. The result counts towards the total SRI score, expressed as a percentage and classified into one of seven classes, from below 20 percent to 90 to 100 percent.

The SRI is a voluntary tool. It is expected to become mandatory for utility buildings with a heating or cooling installation above 290 kW, through a delegated act that the European Commission must adopt by 30 June 2027.