How much Shanghai 4KW home solar power?

Many home solar power system regarded him as a product to ask, in essence, simply ask a home solar power system 4KW how much is difficult to answer, because there is not enough to do a site survey offer is very inaccurate, error There may be thousands of large power stations may differ several hundred thousand. I am an old technical engineer, worked in Shanghai to ex solar energy application technology Co., Ltd. specializes in Jiangsu, Zhejiang and Shanghai solar power projects, from a technical point of view it is necessary to explain to everybody down, in order to know the price, preferred to know 4KW part of the solar system, from the product structure, which includes equipment and ② ① install two charges, ① equipment portion includes solar panels (core member), mounting bracket, inverters, and wires and other equipment, ② mounting portion including line pipe, screws, and the price implied construction technology, solar panels and inverters and wires is relatively easy to obtain, the key is the construction and support, some owners of family housing construction is relatively simple, and perhaps one day Bahrain, some Owners house structure is more complex, two days out of three days are packed finish, the cost of such construction appeared different. At present, in Shanghai and the surrounding areas, all solar companies offer fairly normal, concentrated in 9 yuan / W up and down, and here I can grace the Shanghai Solar's price list, the everyone to be a reference (only for villa projects Large power plants than the low price): Panels 3.9 yuan / W, stand 0.6 yuan / or other materials W, inverter 1.2 yuan / W, wires and power distribution cabinets and other total about 0.8 yuan / W, construction 1.5 yuan / W, plus the cost of reporting procedures and the acceptance of about 0.8 yuan. Thus the total down to probably around 36,000. As for the selection problem, a family how to determine how much of the power plant equipment was enough of it, which involves a matching capacity and demand things, install oversized mean investment is too large, economically worthwhile, installation is too small, the power is not enough, from a technical point of view, the first look at the area of ??the roof can be installed, and the second only to see a family how much kWh of electricity a month on average, the combination of two factors can be accurately calculated How to install power plants, and I am here to Schedule Selection reference table: If we are not particularly know you can add me QQ: 2753200468 or call: 13456200881, our home solar power projects and accumulated rich experience in Shanghai, very happy to answer any problems. You can visit the official website for more information: www.nengsolar.com.