Hi Dizzle, GTAT doesn't manufacture or supply solar panels. They manufacture the PV/Polysilicon Furnaces that produce monocrystalline silicon ingots (used in roof mount PV panels) and multi-(or Poly-)crystalline silicon ingots (used in ground based solar farms). These furnaces are sold to PV panel makers. The GTAT furnaces produce the silicon ingots, which are cut into wafers to be incorporated into PV panels, by the solar panel fabricators.
They also manufacture their next-gen HiCz Monocrystalline furnace to allow the production of higher efficiency N-type silicon wafers for high solar energy conversion efficiency PV cells.
GTAT also is involved in selling their Merlin metallization and interconnect technology, which dramatically reduces the materials and cost necessary to fabricate multi-panel solar arrays. Merlin has the potential to become a breakthrough hit within the PV industry...as it can be adapted/retrofited to existing PV cell/module fabs. The Merlin interconnect system also dramatically reduces installation time and costs. A win-win-win for the PV module manufacturer, the PV panel installer, and the end-consumer.