In 2010, the first private-sector lease including an Energy Performance Contract (EPC) was signed for Green Office® Meudon, the first large-scale positive-energy office building in France, built by Bouygues Immobilier. Bouygues Immobilier has developed energy management software with which the building operator can guarantee the user stable operating charges for a predefined usage.
The Energy Performance Contract guarantees a building's long-term energy efficiency and commits the operator and tenant to a specific amount of charges, calculated according to the building's energy balance. Initially used by local authorities to manage the energy consumption of public buildings, EPCs are now being extended to the private sector. The first EPC between private-sector players is for Bouygues Immobilier's Green Office® Meudon. Under the nine-year contract the building operator, Bouygues Energies & Services, undertakes to guarantee the tenant, Steria, all operating and maintenance costs and levels of energy consumption and production according to predefined principles of operation and occupancy. 40,000 parameters are used to calculate energy performance.
Energy management in the home
In the apartments of the Fort d’Issy eco-neighbourhood , designed by Bouygues Immobilier and located just outside Paris, occupants can use a central control panel and a mobile phone app to adjust the temperature or, for example, open and close their shutters. The comprehensive system enables them to manage their day-to-day energy consumption themselves while reducing their greenhouse gas emissions.
SI@GO, the EPC management software package
The Green Office® Meudon Energy Performance Contract required the development of innovative software called SI@GO.
Three main functions
- Record: SI@GO records the building's energy data every 15 minutes, like an airplane’s black box, representing 50 million data items a year in the case of Green Office® Meudon.
- Exchange: the data are presented in a simple and accessible form for all stakeholders.
- Facilitate: SI@GO produces a monthly report that provides a basis for discussion in order to validate compliance with commitments under the EPC.
More than just a trading tool
- SI@GO differentiates between consumption under the EPC and consumption linked to specific demand by the occupant. For example, if the occupant uses the building at a weekend and the EPC provides only for weekday use, SI@GO will identify the extra consumption arising from the exceptional use.
- SI@GO offers real-time analysis of production and consumption by type of use and by location and enables the operator to manage the building's energy balance.
- SI@GO prepares the building for connection to a smartgrid.