Collective self-consumption: how data centers cluster around solar farms in 2026
The 2023 decree extended the perimeter to 20 km. Why 60% of new French data center projects evaluate collective self-consumption.
What is collective self-consumption?
Collective self-consumption (CSC) lets multiple consumers and producers within a 2 km radius (20 km in rural zones since the 2023 decree) directly share locally produced electricity, bypassing a supplier.
Why it matters for a data center
- CSPE removed on the self-consumed share (saves ~€25/MWh)
- Reduced grid usage tariff (TURPE) in proximity
- Immediate green-energy traceability without separate Guarantees of Origin
- Simple legal vehicle (Personne Morale Organisatrice — PMO)
The economics
For a 5 MW data center hooked to a 12 MW solar farm under 5 km away: - Dedicated solar generation: 14 GWh/year - CSPE + TURPE savings: ~€420k/year - All-in price: €52/MWh vs €78/MWh classic supply
2026 flagship projects
- Data4 + Cestas solar farm (Gironde): 60 MW shared across 3 colocation sites
- Equinix Marseille + Fos park: 45 MW solar in CSC since April 2026
- OVH Roubaix + Hauts-de-France wind: first wind-based CSC pilot
How Voltarione enables CSC
Our map filter "CSC perimeter" highlights producers within 20 km of your data center site in orange. Automatic CSPE+TURPE-savings calculation by département.
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