By concentrating sunlight using innovative optics onto a small area of high-efficiency solar cell material, SolFocus ( http://www.solfocus.com ) systems dramatically reduce the amount of expensive and often supply-constrained solar material used in the system.
Its CPV power unit features all-glass optics for durability and low optical losses for high efficiency. A wide acceptance angle for high yield and lower cost is another attraction, and it is designed to avoid chromatic aberrations and cell mismatching.
High efficiency cells generate greater than 38% efficiency compared to 13% to 19% efficiency for silicon PV cells. The 1cm2 cell per unit results in use of 1/1000th the active PV material, and a robust cell design is designed for the demanding environment of satellites in space.