Small Solar Cells, High Concentration
Explore the spectrum of solar power.
How Does High Concentration CPV Work?
Concentrator photovoltaics (CPV) uses optics to focus the sun’s power on small high-efficiency, multi-junction solar cells. Multi-junction solar cells were originally designed, and are still used today, for space applications. In the early 2000’s scientists started using multi-junction solar cells for terrestrial concentrator solar applications. Using high-efficiency, small solar cells paired to less expensive optics made from glass or acrylic allows for a reduction in the amount of expensive semiconductor material while retaining superior performance. The resulting solar modules are highly efficient and allow the generation of electricity at a lower cost than traditional silicon solar panels.
The ability to convert more of the sun’s power into electricity is at the heart of CPV’s competitive advantage. While even the best PV cells have maximized their efficiency at 25%, multi-junction solar cells currently reach efficiencies over 39%. Cells with efficiencies over 40%-45% are just around the corner. High efficiency is one of the main methods for reducing the cost of solar power. Not only does it reduce the cost of solar equipment but it also reduces the amount of land/roof space needed. Less modules, less space, more savings!
Yes, you can make power by placing a solar panel on the ground, but peak power can only be achieved by pointing that module at the sun as it crosses the sky! Much like a sunflower, CPV systems follow the sun’s path to maximize the amount of energy captured. CPV achieves this by the use of tracking systems, which provide more consistent power output throughout the day. This means more energy generation during the peak hours of the day when electricity consumption is at its highest. CPV uses dual axis tracking systems to precisely follow the sun within 1 degree of its current position, ensuring maximum sunlight to electricity conversion..