EWF recently announced the publication of the Origin dApp during EventHorizion 2018. Origin provides a method based on the Energy Web Chain to certify and track renewable energy generation on the kWh level, including marginal grid CO2 emissions. In that way, the Origin dApp provides the basis to trade renewable energy certificates via the Energy Web blockchain. The Origin dApp was developed to be compatible with existing certification systems and regulations to allow a smooth transformation from existing systems towards a blockchain-based solution.
More details about the Origin dApp can be accessed here