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A flexible and smart energy solution combining Onsite Solar PV and Battery storage enabling companies and local authorities to increase green self-consumption

July 2023
Gallery Flexisun 1
Gallery Flexisun 1


Flexisun®: an integrated offer that combines solar potential and energy storage. ENGIE has developed Flexisun so that solar energy generated on-site can also be consumed when the sun is not shining. This solution maximises self-consumption of decarbonised and local energy, on average 20% higher than a photovoltaic installation alone, further reduces CO2 emissions and electricity bills, and increases energy self-sufficiency and resilience regarding the grid. Thanks to Flexisun®, it is also possible to take advantage of other local renewable sources, or integrate charging stations for electric vehicles, improve the quality and reliability of electricity supply, benefit from the additional advantages offered by the battery: optimised prices, reduced consumption peaks, participate in grid ancillary services, etc. Finally, the Energy Management System (EMS) allows to control the installation in real time and to optimise the different components. With Flexisun®, ENGIE is helping its customers, business, and local authorities to make the transition to carbon-neutral energy with a combination of onsite renewable energy, with storage and an energy management system.

  • /
Label Date July 18, 2023
From France
Maturity stage Small scale commercialization
Looking For Network, New clients, Visibility, Partners, Credibility

The environmental benefits

  • Maximize green onsite self-consumption for On-grid configuration (40 to 80%)
  • Reduce fossil fuel consumption for Off-grid configuration (60 to 90% fuel savings)
  • Increase energy autonomy and resilience
  • An industrial client with a load of 3 GWh/year can avoid 2900 T of CO2 over 10 years
  • For an island project, over 6000 T/year of CO2 can be avoided through the reduction of diesel consumption

The Financial benefits

  • FLEXISUN allows to reduce electricity bills by 10% or more in the long term
  • FLEXISUN allows to avoid voltage dip interruptions by up to 100 K€ per year
  • A fully financed solution that enables clients dedicate their own CAPEX to their core business

Activity Region

  • /
  • Headquarters
  • Activity

Company Profile


Our group is a global reference in low-carbon energy and services.

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The information set out above, is solely for the purposes of information and the Solar Impulse Foundation does not provide any guarantee as to its authenticity, completeness or accuracy. This information does not constitute investment advice or a recommendation to buy into, transact or to enter into any agreement with any of the parties or persons mentioned above. Potential investors or interested parties are solely responsible for their investment or business decisions and for performing any due diligence required by the circumstances. The innovator ENGIE has asserted ownership of the intellectual property rights for images, videos, and content showcased above, affirming full and unrestricted usage rights, and has provided explicit permission for the Solar Impulse Foundation to publish such information designated as "public" in the application form.