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The Light is Green


Fuel Cell

The greatest advantage of STS over PV is capital cost.

  • PV systems cost about $8/Watt.  
  • Efficiency is about 14% at the panels, and about 92% at the inverter.
  • Output declines with time
  • Manufacture is energy intensive
  • Toxic chemicals required during manufacture
  • Clean-room product
  • Fragile components
  • Replacement components must be matched to existing components
  • Minimal overload capability
  • Heavy on roof > 5lb / sq ft

In all fairness, PV has some advantages too.

  • Quiet / Silent
  • No moving parts
  • High reliability with battery backup



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Updated: 09/11/10 19:33