Our Technology
GreenField’s StarGen™ concentrator uses an advanced sun tracking and control system, which incorporates many proprietary technical innovations.
GreenField’s StarGen™ concentrator makes maximum use of ‘off-the-shelf materials’. 28 identical light-weight mirror modules are easily assembled on-site, providing 900 ‘suns’ of high-intensity concentrated light.
These photos show how GreenField’s StarGen™ concentrator can be lowered to the ground or turned upside-down during assembly and maintenance. The innovative structure design allows for easy installation and servicing, eliminating the need for cranes or ladders.
PhotoVolt™ Cell
GreenField has taken a novel approach to significantly reducing the cost of solar power. The PhotoVolt™ cell is a rugged, low cost, high voltage and low series resistance silicon solar cell with vertical junctions and contacts providing near-optimum current collection without sheet resistance, current crowding, or blockage of illumination. Being designed for high-intensity operation, it inherently uses a greatly reduced amount of semiconductor material as compared with flat-panel cells. This innovative cell is designed for efficient operation at high intensities (hundreds of suns and higher), a unique feature compared to other solar cells. The PhotoVolt™ cell is more robust and less expensive to produce and implement in a high intensity concentrator system than other types of exotic cells designed for high intensity operation. Being fabricated from silicon, these cells leverage the most widely used semiconductor material, and avoid environmental concerns and degradation issues associated with some of the other cell technologies.The key PhotoVolt™ cell advantages can be summarized as follows:
