Introducing PV Ultra
RayGen pioneers PV Ultra, an innovative, next generation combination of high-efficiency solar cells and low-cost mirrors.
The PV Ultra system uses a field of active mirrors (known as heliostats), which collect and focus sunlight over 600x to a tower-mounted central receiver. The receiver contains an array of ultra-high efficiency modules which are actively cooled. The modules convert the light into electricity (there is no heat turbine), and captures thermal energy from the cooling as a useful by-product. The mirrors only focus the light onto the receiver, they do not generate electricity.
Least cost solar collection
The heliostats in the ‘collector field’ follow the sun throughout the sky with two-axis tracking as standard. The mirrors are self-powered (with a small on-board solar power panel) and communicate wirelessly with the tower – no field wiring is required.
The mirrors are inexpensive to manufacture, to install, and to maintain. They do not need foundations and are highly error-tolerant. They can be mounted on a driven-pole and only a spanner is required to install and commission.
Highest efficiency solar conversion
The ultra-high efficiency module mounted in the tower is actively cooled and converts the focussed sunlight into electricity as well as heat.
The module uses only the best solar cells available which are twice as efficient as conventional silicon PV cells at converting light to electricity. In addition, the sunlight that is not converted to electricity is captured as heat and available for many applications.
Thus, PV Ultra creates useful commercial products from over 80% of the sunlight that strikes the mirrors – conventional silicon PV typically utilises less than 20% of the sunlight that strikes the panel surface.