PIPER-BW: A renewable energy hub in Walloon Brabant

In response to the urgent need for climate action and energy autonomy, BESIX Group and public utility inBW have partnered to develop PIPER-BW (Industrial Renewable Energy Production Projects in Walloon Brabant). Located on the former Sablière site, this ambitious project will transform a residual area into a flagship hub for sustainable energy production.

Project overview

PIPER-BW will feature 12,000 photovoltaic panels, a 2 MW battery energy storage system, and eight fast-charging stations for lorries. The project is designed to support local self-consumption, reduce CO₂ emissions, and contribute to Wallonia’s 2030 Air-Climate-Environment Plan. BESIX Power is leading the development, construction, financing and future operation of the site.

The Executive Board of inBW awarded the contract to BESIX Group because of the quality of its business model, the clarity of the project governance, its innovative energy solutions and the proposed synergies. The openness to citizen involvement, through crowdfunding or energy communities, was also a decisive factor.

Key highlights

General information
Client: inBW
Sector: Public intermunicipal utility
Building type: Renewable energy infrastructure
Status: Preparatory phase ongoing
Technical data
Installed capacity: ~10 GWh/year (full deployment)
Number of panels: 12,000 (4,000 in phase 1)
Roof surface used: 8 hectares of embankments
Inverter type: To be defined during development phase
Panel orientation: South-facing, optimised for solar yield
Battery storage: 2 MW capacity
Smart curtailment system: Energy management software for self-consumption optimisation
Charging points: 8 fast-charging stations for lorries (2 in phase 1)
Objectives & benefits
Expected energy savings: Equivalent to the consumption of 2,857 households
Self-consumption vs grid injection: Priority on-site usage with potential grid injection
CO₂ reduction: Significant contribution to regional decarbonisation
Regulatory compliance: Aligned with Wallonia’s 2030 Air-Climate-Environment Plan
Financing
Model: Public-private partnership (PPP)
Support provided: BESIX Power leads development, financing, and local exploitation

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