GF 80 solar modules are suitable for the SQFlex water supply system based on renewable energy sources. GF 80 solar modules consist of 68 monocrystalline silicon solar cells in series with bypass diodes. The solar cells are laminated between sheets of ethylene vinyl acetate (EVA) and 3 mm high-transmissivity low-iron tempered glass. Each solar module is equipped with plugs and sockets for easy connection of several modules in parallel or series. The solar modules must be mounted on a support structure, tilted at an angle ensuring optimum utilisation of the solar energy.