It is not either-or, but both-and. The total electricity consumption in the Netherlands lays around 110,000 GWh and increases annually by about 3% (according to CBS Netherlands). This means that if all suitable roofs in the Netherlands would be equipped with solar panels, they could only supply approximately 25% of the Dutch electricity demand. In order to reach a larger share of solar energy, a larger surface area of solar panels is required and therefore alternative types of solar cell applications than only rooftops must be found. In this regard, roads are an interesting option. The approximately 140,000 km of roads in the Netherlands cover a total area of about 400-500 km2, which is significantly larger than the total (suitable) roof surface area. With the integration of solar cells in road infrastructure, a great potential has come into existence, creating a complementary market for solar panels.