Green certificates and levies

The implementation of public service obligations and the collection of levies are imposed on the network operator by regulatory decisions of federal and regional governments.

Sale of Walloon green certificates - auction organized by Solar Chest

In order to spread the tariff impact of the public service obligation that weighs in on Elia because of the obligation to buy green certificates at a guaranteed minimum price, the Walloon regulation put in place a reservation mechanism in 2015 for a portion of the excess certificates.  Through this mechanism, certificates (with an extension of their remaining validity period) are temporarily withdrawn from the market and kept in reserve by Solar Chest and, a few months before the expiry of their reservation, offered back for resale on the market.

Solar Chest will organize auctions for green certifcates in 2021  as provided in Article 42 of the Electricity Decree of 12 April 2001.  For further information, please visit


Indicative schedule for auctions of green certificates and combined heat and power certificates

Elia organises auctions of green certificates and combined heat and power (CHP) certificates.

The indicative auction schedule is shown below, and may change in the event of unforeseen circumstances.

Announcement by Elia  Deadline for submission of participants' bids  Attribution  Auction scope 
03/11/2021 17/11/2021 19/11/2021 Flemish regulation – Green Certificates and Combined Heat and Power Certificates 
If you have questions on the sale of Walloon green certificates to Elia
You can reach us from 9.00 a.m. to 12 noon, Monday to Friday. 

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