Questions for Solar Panel Use

Using AMPs to Estimate Power Requirements

You should use the current draw in amps to be more accurate. Let's calculate the amp-hours the solar kit will need to generate. Using the same example of the 15 watt light bulb we note that it consumes 1.25 amps so after six hours it will have drained 7.5 Amps from the battery that needs to be replaced every day. If you want a solar panel large enough to top up the battery in 5 hours of sun then it must generate 1.5 amps. Reading the electrical data for a 20w solar panel shows the Maximum amps (Imp) is 1.2amps...Not enough, so our previous calculation using watts gave incorrect data, why? Because the solar panel generates about 18 volts but we are only using about 14 volts to recharge the battery, the rest of the solar power is wasted. Using amps we see that we will need a larger solar panel, in this case a 30 watt BP solar panel with an Imp of 1.8 amps.



What recommendations give when looking for a solar powered battery charger to charge a 12v battery for solar power house supply? It is recommend one of the folding solar panels. They are available in sizes 10, 20, 40, 80 and 120 watts. They have attached solar regulators (except the 10 and 20 watt Powertech kits) and come with battery cables with clamps. The size you select would depend on your battery size and power usage. The 20 watt unit generates out about 1 amp at 14 volts (battery charging voltage) and the large 120 watt unit puts out about 6 amps. You can estimate a solar panel collects about 5 hours of peak sunlight per day, so the 20 watt unit would provide about 1amp x 5 hours = 5 Amp-hours a day, the 120 watt unit would provide about 5 x 6 = 30 Amp-hours a day, (enough to fully charge a 30 amp-hour battery ). Replace that calculation with you actual data to work out how large the solar panel needs to be. Solar panels are rated in watts. For instance, 500 watt solar panels will produce 500 watts of power each hour of peak sunlight. A Solar module manufacturer will produce different solar panels according to customers’ needs in watts.

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Chinese Solar Panel Industry is Facing Winter

Global Solar Panel Industry Status

As for the world's largest manufacturer of solar panels founder Shi Zhengrong, the days now is a little bit difficult. Zhengrong Shi was one of the richest people in China, but now, he single-handedly created the Empire is in deep trouble. This also reflects a wider range of China's solar industry is undergoing change - China is the world's largest producer of solar panels. After years of rapid expansion, a large number of the world supply gets lower and lower prices of solar panels, the high leverage solar module manufacturer had cuts and layoffs, and even some companies reduced to a possible bankruptcy.

Chinese Solar Panel Industry Tough Survive

Though solar industry gave birth to some of China's richest entrepreneurs in his heyday, but many of the rich have been falling for release in this month (Forbes) 2012 China Rich List. Timothy Lam, an analyst at Citigroup (Citi) in Hong Kong, said: "This is a survival battle." He estimated, the solar manufacturing industry in mainland China and Taiwan only have 50-80% of capacity in operation, because the companies are trying to loss to a minimum, while the 500 watt solar panels prices continue to fall. Other forecasts are even more terrible. China's top energy policy makers, said Li Junfeng, "the solar panel industry in China is as a living patient relying on the life support system”. He predicted that the "crisis" of excess capacity built up from the easy credit of the past five years in the solar industry to recover before the half of the world's solar capacity need to be closed.



Chinese Government Support the Solar Panel Industry

With the global solar panel manufacturers steps into a painful period of integration, analysts said, the prospects for solar panel manufacturing in China and abroad will depend largely on the initiative of the Chinese government. The number of bankruptcy companies during this period is so great. China policy impact of the global solar market will be two ways: first, to promote domestic demand for solar panels, and second, the introduction of supporting policies to help local manufacturers of solar panels from bankruptcy. By increasing the installed capacity of the domestic solar panels, the Chinese government has been trying to absorb part of the excess capacity of the solar panels. Most analysts now predict that China will become the world's second largest solar panel market this year, second only to Germany. By then, China's installed capacity of solar panels will reach 4-5 GW. China in 2015 solar panels installed capacity target to 21 GW compared with the 25 times of the total installed capacity in 2010.

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