OPTIGRÜN-SOLAR SOLon is the ideal solution for the combination with already existing green roofs. The system can be installed securely in place with low loads, making it also suitable for roofs with limited static reserves. The advantages of OPTIGRÜN-SOLAR SOLon can be seen when used in combination with new or existing green roofs. The vertical mounting frame guarantees a consistent supply of light and water to the vegetation, allowing the green roof to develop optimally. The energy yield for the vertical system is comparable to a conventional east-west green roof mounting frame. It can even minimise yield losses due to snowfall. OPTIGRÜN-SOLAR SOLon thus represents an economical solution for sustain-able urban development.