REhnu’s technology is poised to make solar electricity at lower cost than any other solar method, including conventional flat-panel PV generation, and to compete directly with fossil fuel. Here’s how:

  • Uses mirrors for inexpensive sunlight collection. REhnu’s glass mirrors are made of inexpensive glass, by methods similar to those proven in high-volume manufacture of trough mirrors. Reflectivity stays high for > 25 years, shown by trough plants.
  • Smartest use of PV materials. The total area of multi-junction PV cells required at the mirror focus is a 1,000th that required for silicon flat panels yielding the same power. This results in overall cost of PV material a fraction of that for silicon panels.
  • Twice the sunlight to electricity conversion efficiency of the best PV panels. REhnu uses commercial multi-junction PV cells with 42% efficiency, compared to 21% efficiency for the best silicon panels.
  • Electricity and heat. REhnu’s mirror module generates 800W of electricity and also 1200W of heat. By comparison, a standard-size PV module is 60% the size but generates only 1/3 the electrical output and no usable heat.

    The annual energy output of a REhnu module is equivalent to the electricity made by 3 rooftop solar panels plus the heat of a solar water heater.

  • 40-year plant lifetime, with efficiency increasing over time. Multi-junction cells are being made more efficient all the time. Because REhnu uses them in small, inexpensive and replaceable units, the next generation of cells can be easily and economically swapped in, thus increasing efficiency over extended lifetime.
  • Combined thermal and electrical power for industrial production.
    • (1) The largest industrial use of solar hot water heaters is in copper extraction. 1,000 REhnu M-8 units could provide enough heat for electrowinning 100 tons of copper per day, plus 6 MW of electrical power.
    • (2) In conjunction with the University of Arizona, REhnu is developing a single mirror (M-1) unit optimized for installation in closely-packed arrays on flat industrial rooftops. Because it has very high electrical conversion efficiency, such an array will deliver more electrical energy from a given rooftop than is possible with even the best conventional PV modules. The array will also provide heat for use within the building.
  • Quick scale-up in production without expensive new facilities. The design and manufacturing methods are configured to take advantage of existing high-volume PV cell, mirror, and tracker production facilities. The company is thus staged for rapid growth to reach the economies of scale of high-volume solar power.
  • More electricity for the same land or rooftop area as conventional solar. No cooling water or blading of the land required.