Renewable Energy Conferences.com | Renewable Energy Events, Conferences, Exhibitions, Training and Seminars: Pythagoras Solar Announces Photovoltaic Glass Unit (PVGU) Pythagoras Solar Announces Photovoltaic Glass Unit (PVGU) ================================================================================ REC.com on 18/05/2010 15:55:00 First Green Building Material to Combine Energy Efficiency, High Density Solar Power Generation and Transparency