Photovoltaic panels generate electrical power by converting solar radiation into electricity using semiconductors that exhibit the photovoltaic effect.
This refers to photons of light knocking electrons into a higher state of energy to create electricity. Solar panels use a number of cells containing a photovoltaic material, such as mono or polycrystalline silicon.
In this application a frameless crystalline solar system has been bonded directly onto a metal roof. It is made from 72 mono- or polycrystalline cells and has a weight of just 8.5kg/m2. This is made possible by eliminating the frame and providing stability using 3.2mm of solar glass. The junction box has been rotated by 180 degrees to enable mounting and optimised cable routing between modules. The use of crystalline modules provides a very high energy-to-area return, delivering close to 15% efficiency.
The solar laminates are protected against removal or theft as they are physically bonded onto the roof surface with an advanced industrial adhesive to allow for fast and easy mounting. The foundation of the anchoring methodology relies on the highly stable and durable Colorcoat Prisma® pre finished steel product manufactured by Tata Steel and an advanced adhesive system. As a result, the solution is suitable for roofs with low static load capacity or the need for purlin/frame reinforcement.
Application on SBEC building
The lightweight PV system installed on the roof of SBEC uses 42 high performance crystalline photovoltaic laminates covering an 84m2 area. The modules are arranged into 3 strings of 14 with a total installed power of 11.34kWp. The system is capable of producing 9.69kWh of electricity per year for SBEC.