China has been rewriting its renewable energy plan in the wake of the Fukushima Nuclear Energy Disaster in Japan.Note there has been a strong global backlash against nuclear energy around the world and 7 nuclear plants in Germany have been closed all but in name.Other countries like South Korea,Italy,Switzerland are rethinking of what do about their nuclear reactors giving the massive tail risks with nuclear generation.China had a target of only 20 GW of solar by 2020 has decided to raise the target by 150% to 50 GW according to the country’s leading energy planning authority NRDC.Note China installed more than 15 GW of Wind Energy in 2010 alone becoming the world’s largest Wind Energy Market by far.Solar Energy strongly lags Wind in China despite China having the biggest solar panel manufacturing industry in the world.Its Golden Sun and other Solar Subsidy programs have been small in absolute terms compared to its huge electricity capacity.

Solar Panels have grown exponentially in the last few years driven by declining costs and growing energy prices.The advent of the low cost manufacturers of silicon solar panels from China,falling raw material polysilicon costs,subsidies from governements fighting climate change have all contributed to the more than 150% increase in world solar demand in 2010.Solar Panels are not only being used on roofs and giant rooftop ground plants,but also are being integrated in buildings known as BIPV applications.Solar Panels are also available in flexible forms which can be used in backpacks and other innovative ways.Now there is another niche for solar panels that is growing.Note most of these companies are using the Concentrated Photovoltaic Technology (CPV).The traditional CPV suffers from heating problems as high concentration of sun power leads to high temperature.Building the CPV systems on water will help them solve their problems according to these companies.

Note Big Oil and Gas has been slowly been retrenching form the solar energy industry despite initial leadership.Shell which was one of the biggest solar players has become almost non-existent while BP has shut down a number of solar factories outsourcing production to China.Other Oil and Gas companies like Exxon,Valero,Chevron and others have concentrated their energies on related green sectors like algae based biofuels rather than on solar and wind energy.So the move by Total comes as a surprise as it acquires one of the top 15 solar panel companies in the world.Sunpower is being acquired at a cheap price considering its world beating solar cell technology and its massive systems business which has gigawatts of solar projects under development.Note Sunpower makes the highest efficiency solar panels on a commercial scale and recently tied up with AUO.It is the 2nd biggest solar plant installer in the US and has a massive presence in the commercial and government sector.Total said it looked at over 200 companies before buying Sunpower.Note M&A has been strong in the Solar Thermal Industry and has now started picking up in the Solar PV Industry as well.With solar company valuations at a historic low,it makes sense for the larger chemical and energy companies to pick up good companies on the cheap.

India is a massively energy deficient country with official figures citing around 15% of peak electricity demand deficit due to lack of power generation and distribution.The figures would be much higher if you add the thousands of villages which don’t have grid connectivity and access to power.Solar Energy in India is perfectly suited to fill […]

Silicon for Solar Cells that are used to make the normal crystalline solar panels is known as Polysilicon.This is a highly purified form of the Silicon Metal that is mined.Note Polysilicon is made through chemical processes which help in purifying the raw silicon and removing the impurities.The Silicon that is used to make Silicon Cells is also used to make semiconductor wafers which is the raw material for the Electronic Industry.Solar Cells require slightly lower purity of 6N compared to the higher 9N required by the Semiconductor Industry.Once Polysilicon is produced it has to be made into flat wafers which require further industrial processes like pouring the metal in crucible to make ingots and then cutting the ingots by wiresaws to make solar wafers.The solar wafers are then converted into solar cells by processes like diffusion,etching etc.

A lot of confusion exists about solar cells efficiency about which technology results in how much efficiency and the difference between solar cells and the solar panels efficiency.Note the biggest differentiator of a solar cell besides its cost is its efficiency.Not only do different materials give different efficiencies,even different companies have conversion efficiencies which differ for the same technology.Silicon Solar Cell Efficiency also depends on the purity of the solar wafer which is used as raw material to print solar cells besides whether it is monocrystalline or multicrystalline solar cells.With most of the low lying fruit already gathered in respect to lowering cost of the silicon solar cells,most of the big Chinese solar companies are concentrating their efforts in improving the efficiency in order to cut down costs in the cutthroat solar industry where the stars of yesterday are fighting to stay alive (Energy Conversion Devices,Evergreen Solar).This rising tide of the solar industry in 2010 has not been able to revive the fortune of some companies though European companies have made enough to fight another day.Solar Cells Efficiencies also differ in the champion cells tested in labs like NREL and on commercial lines.But here is a general range of efficiency of different types of solar cells made from different technologies

Solar Cell Efficiency Improvement is the best way to reduce the costs of solar power and reach grid parity in most places in the world.Solar Cell Efficiencies have improved continuously and with a number of companies and startups investing billions of dollars in research,it will keep improving.However cost considerations are an important factor as well and the technology which balances the two will win the solar energy race