Biosolar Installation
Optimising the combined technologies
In the Bauder Biosolar solution, the solar modules are raised above the substrate and angled at 10° to optimise the capacity for solar energy production and green roof area so that both can easily occupy the same space and work in synergy. In alternative systems the technologies compete against each other for roof space, with one conceding to the other.
The PV panels are set at around 300mm above the level of substrate so that the growth of the vegetation does not reduce the efficiency of the panels through shading and allows for maintenance of the green roof. The height also lets sufficient levels of moisture and light infiltrate beneath the modules, supporting different species of plants and enhancing the biodiversity of the roof.
Improved solar panel efficiency
A combined green roof with PV delivers advantages to the building as the cooling effect of the vegetation and water held within the green roof system preserves a cooler ambient temperature around the photovoltaic array. Studies in Germany have shown that PVs work most efficiently with an ambient temperature of around 24°C and that when an array is combined with a green roof, the panels are expected to achieve around a 5-7% higher output compared to an installation on membrane alone.
Bauder biosolar module section - cross section
The mounting board is a bespoke moulded landscaping component manufactured from polypropelyne with a deep recessed profile that provides water storage and multidirectional drainage whilst also providing a repository for the green roof substrate. A support profile is formed in the centre of the board to which the mounting arms are attached. The boards are positioned on the top of separation and protection layers which prevent mechanical damage to the waterproofing.