Slim Opgewekt realizes sustainability in schools. In the first place by installing solar panels and LED, but also by teaching children more about energy. For example, with self-developed sustainable games and an innovative monitoring screen in the hall. To make sustainability possible for schools, Slim Opgewekt has set up the Slim Opgewekt Sustainability Fund together with Triodos Bank. This fund is not for profit. Both large and small schools that are making more sustainable with Slim Opgewekt can make use of the fund.

The fund offers favorable interest rates and the option of a loan period of up to 15 years. This ensures a wide spread of the investment, which means that the annual costs are lower. As a result, schools can quickly fully cover the cost of sustainability from the savings on their energy costs.