More renewable energy production, positive energy blocks, collective self-consumption of energy produced for a whole building... La Confluence is testing new technologies and taking steps to improve energy management with each new project.


Using solar energy is one of the main levers in the energy transition. 7,000 m² of solar panels have already been installed in La Confluence, new buildings and eco-renovated buildings combined. Eventually, this number will triple. Photovoltaic electricity production is estimated to reach 2 megawatts by 2030 (compared to 1 megawatt today), equivalent to the electricity consumption of two thousand people.


Some buildings have been designed with the aim of producing more energy than they consume: this is the positive energy principle. Inaugurated in 2013 in La Confluence, the "Amplia” residence was the first building of this kind in Lyon thanks to its roof covered with photovoltaic solar panels and a high-performance insulation envelope (external wall insulation). The operation was then scaled up and extended to the entire "Hikari" block, which combines several forms of renewable energy :

  • photovoltaic: roof and facade panels,
  • biofuel: a cogeneration boiler running on rapeseed oil and producing heat and electricity,
  • geothermal: heat pump.

Collective self-consumption
What if it were possible to directly consume energy produced by your building? This principle is being developed in several projects in La Confluence: 
> "H7": energy exchanges produced by the photovoltaic plant installed as part of the renovation work are certified by a blockchain
>"Ydéal" : an installation with a battery for storing energy and allowing power supply across the block as required. Each homeowner acquires a share of the photovoltaic and energy storage facilities.
> "Sollys" : will allow deployment of self-consumption on a larger scale of 12 buildings. The self-produced energy will be distributed among the users of the buildings in real time as part of the Eurêka Confluence program.

A virtuous heat network connected to the CEMS 
La Confluence has a collective urban heat network that distributes cleaner and less expensive energy. Connected to the Grand Lyon Centre Métropole network, this system provides heating and domestic hot water to new buildings, eco-renovated public buildings in Sainte-Blandine and any condominiums that request it. The specific feature of this network is its substations connected to the Community Energy Management System (CEMS), enabling recording of consumption data and a better understanding of needs.