3 September 2025
A smarter way to simulate support for renewable electricity
For years, Climact has supported clients in navigating Wallonia’s green certificate schemes, from understanding the regulatory framework to simulating expected revenues. These simulations are essential for investment planning, budgeting, and assessing the business case for renewable projects, particularly in a context where electricity prices and policy parameters evolve rapidly.
But traditional simulation methods come with limitations. They’re time-consuming, hard to maintain, and quickly become outdated. That’s why we’ve developed the Green Certificates Simulator : a dedicated web-based tool designed to make simulations more accessible, reliable, and insightful for developers and portfolio managers alike.
A tool built around the needs of project developers
The simulator enables users to estimate the number of green certificates their installations may receive under either the Walloon kECO or CPMA regime. The tool supports both wind and solar energy production, but our experts can also assist your biomass and hydropower projects on request.
Built for real-world use, it helps address the specific needs of developers by combining ease of use, regulatory alignment, and deeper insight into the workings of the support schemes. Simulations can be launched anytime, from anywhere, giving you full flexibility and control.
1. Ease of use: from individual projects to full portfolios
Support schemes like kECO and CPMA can feel complex. Our goal was to make simulations simple. The tool requires only a limited number of inputs, such as commissioning dates and electricity price projections. Once uploaded, the simulator takes care of the rest.
For portfolio managers, a multi-site simulation mode enables the automatic processing of dozens of installations in a single run, significantly reducing manual effort and improving portfolio oversight.
2. Up-to-date and reliable: aligned with evolving support schemes
With frequent updates to green certificate methodologies, including the ongoing revision of the kECO regime, keeping simulations aligned with the latest methodology is critical. The simulator integrates methodological changes as soon as they are published, ensuring that users work with the most current assumptions.
To support proactive planning, the tool incorporates draft methodological updates where relevant, allowing users to assess their potential implications before they are finalised.
3. Advanced insights: anticipate changes, understand results
Thanks to close monitoring of the electricity market, the tool can reliably simulate forthcoming kECO values more than six months before their official publication, giving users greater budgetary certainty and a valuable head start over competitors still relying on official releases.
Long-term electricity price assumptions significantly affect your expected support levels. That’s why we’ve made price sensitivity analysis a core feature. Users can upload multiple electricity price curves and compare their effect on projected green certificate revenues, helping assess the resilience of their business case.
In addition to modelling, the tool offers intuitive visual outputs and clear explanations of results. Outputs are fully downloadable, making it easy to share findings internally or with external stakeholders.
And because our goal is not just to deliver numbers but also understanding, our packages include dedicated Q&A sessions. These help users understand the methodology, interpret results, and engage more confidently with the broader green certificate landscape.
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