Solar roof

C21e & C21t
solar electric & solar thermal roof tiles

High efficiency
C21e:
• Delivers high power output - 52Wp per tile, less than eight square
metres per kWp (kilowatt peak)
• Back mounted contact strips increase the effective collector area
and reduce surface glare, typical with standard solar cell technology
• Integrated ‘thru-flow’ ventilation enhances PV performance


C21t:
• Less than eight square metres provides roughly two thirds of the
hot water for an average three bedroom home
• Latest insulation technology maximises heat retention

Calera Corporation

calera corporation a start-up by a former Stanford professor Brent Constantz (a specialist in earth sciences) .It is one of the portfolio company of khosla ventures .They are into Sustainable, Renewable New Building Materials .
Calera Corporation is dedicated to reversing global warming and ocean acidification by trapping the greenhouse gas, carbon dioxide, in the built environment, proactively reducing the level of free carbon dioxide in the Earth's atmosphere.