However, as the penetration of variable renewables in the system grows, they will need to become normal actors in the overall energy markets. It opened the opportunity for renewable energy generators under the FIT scheme to opt for selling electricity directly into the market. This has been applied in particular for wind farms. Under the market premium model, a wind farm sells its produced output to a third party at the market price rather than selling it to the grid operator at the regulated feed-in-tariff.