What kind of photovoltaic power generation is generally suitable for installing solar on the roof

Although theoretically photovoltaic power station every deviation from south ( In the northern hemisphere) 30 °, phalanx of generating capacity will reduce 10% ~ 15%. But on a sunny summer, the sun radiation energy's the big moment later at noon, when bearing a partial westward, is obtained with electrical

although in theory, a square array of electricity will be reduced by 10% ~ 15%, and each deviates from the south ( In the northern hemisphere) 30 degrees. However, in the sunny summer day, the sun radiation energy big moments later at noon, when the azimuth slightly to the west, will generate electricity. Similarly, when the winter solar radiation is bigger, the sun radiation is slightly east. Therefore, as long as your roof within 20 degrees south, will not have much impact on power generation. In addition, the photovoltaic technology is very mature now. Using efficient photovoltaic module will produce 10% more than ordinary pv module 30% of the electricity. At this time, you really don't have to do anything. As we all know, the best choice when you install photovoltaic power station house south side of the roof, because the location of the solar radiation is very big, is the best location for photovoltaic power station. However, in fact, the house is affected by the surrounding environment. Many houses not north and south, it is to some extent affect the power generation plants. These houses are not suitable for install photovoltaic (pv)? There are two solutions. One is on the roof of building a steel structure facing south. Second, photovoltaic power station to the north will enhance or support, elevation will be subject to the local advantageous Angle. But, please remember, no matter what method you choose, in order to ensure the stability of the photovoltaic power station, you still need to find a regular brands of photovoltaic power station to help you design and building photovoltaic power station, so as to realize the goal of good photovoltaic power generation.