Double use of space increases solar power production
The Lake Thun wastewater treatment plant (ARA) and dhp Technology have put the HORIZON solar folding roof into operation. With an output of 3.6 megawatts peak, the system is the world's largest solar folding roof.
According to a press release, ARA Thunersee has inaugurated HORIZON, the largest movable solar folding roof in the world. It was realized by the cleantech company dhp Technology from Zizers. With an installed capacity of 3.6 megawatts peak and around 3 gigawatt hours of electricity, the system will supply 700 households.
According to ARA Thunersee, the more than 20,000 square meter plant is based on technology from dhp Technology. dhp CEO Gian Andri Diem sees great potential in generating energy on existing areas. “This is how we create progress without taking up additional space,” he is quoted as saying.
According to dhp’s project description, efficient use of space is relevant in order to make progress with the energy transition through photovoltaics. Wastewater treatment plants, logistics areas, waterworks and parking areas are particularly suitable for solar power production due to their previously unused areas. According to Ingo Schoppe, Managing Director of ARA Thunersee, “intelligent land use makes an active contribution to security of supply, economic efficiency and climate protection”.
The solar folding roof spans several clarifiers and makes double use of existing infrastructure areas – for wastewater treatment on the ground and for solar power generation above. The electricity generated there is intended for wastewater treatment and local supply.
Based on Swiss cable car technology, the roof is able to react to extreme weather conditions. It folds up automatically in the event of storms, snow or hail. This allows operational safety and energy production to be achieved without having to intervene in ongoing processes.