SolarCity claims it has created the world's most powerful solar panel

SolarCity today said it has manufactured the world's most efficient rooftop solar panel.
The photovoltaic panels have an efficiency exceeding 22%, the company said, 7 percentage points higher than the average rooftop panel efficiency rating of roughly 15%.
"The new SolarCity panel generates more power per square foot and harvests more energy over a year than any other rooftop panel in production and will be the highest volume solar panel manufactured in the Western Hemisphere," the company stat