rooftop solar

A rooftop photovoltaic power station, or rooftop PV system, is a photovoltaic system that has its electricity-generating solar panels mounted on the rooftop of a residential or commercial building or structure. The various components of such a system include photovoltaic modules, mounting systems, cables, solar inverters and other electrical accessories

Rooftop mounted systems are small compared to ground-mounted photovoltaic power stations with capacities in the megawatt range. Rooftop PV systems on residential buildings typically feature a capacity of about 5 to 20 kilowatts (kW), while those mounted on commercial buildings often reach 100 kilowatts or more.

According to a 2011 report by BRIDGE TO INDIA and GTM Research, India is facing a perfect storm of factors that will drive solar photovoltaic (PV) adoption at a "furious pace over the next five years and beyond". The falling prices of PV panels, mostly from China but also from the U.S., has coincided with the growing cost of grid power in India. Government support and ample solar resources have also helped to increase solar adoption, but perhaps the biggest factor has been need. India, "as a growing economy with a surging middle class, is now facing a severe electricity deficit that often runs between 10 and 13 percent of daily need".

Plant capacity 1 kW 2 kW 5 kW 10 kW

Panel efficiency

Rooftop space required (SF)
12.0% 125 250 625 1,250
12.5% 120 240 600 1,200
13.0% 115 231 577 1,154
13.5% 111 222 556 1,111
14.0% 107 214 536 1,071
14.5% 103 207 517 1,034
15.0% 100 200 500 1,000
15.5% 97 194 484 968
16.0% 94 188 469 938

The Innovator

Gurmit Singh, New Delhi

Dr. Gurmit Singh is a research scientist and an environmentalist, his profound enthusiasm and passion for renewable energy technologies has been for 28 years now. He holds both his Bachelors and Masters degrees from 'Rheinisch-Westfalische Technische Hochschule Aachen.' In Germany and spent 14 years in Germany working as a research Scientist and then 8 years in Florida, USA in Solar Research. He is winner of 'Lockheed Martin Innovation Award 2008' in renewable energy, also won the '2010 BuildArch Award'and recently won the 'i3 India Innovates Award 2011'. His professional career started with a technology assessment of the carbon abatement potential of specific industrial technologies in the EU, and the evaluation of national and international policies and measures in the areas of climate change, energy efficiency and renewable energy. Currently he is a Visiting Faculty for 'Renewable Energy' at Amity University, Noida