Household solar power systems have economic sense?

1 - 10-5 kw home system 20 kw household system a system after the installation, the owner should care about most is the investment return period.

analysis of a system gains, owner-occupied electricity, you need to consider more than electricity from several aspects such as Internet and government subsidies.

distributed pv subsidy standards across the country to 0. 42 yuan/KWH, deadline is 20 years, and the other provinces and cities around also has different levels of subsidies for photovoltaic power generation.

suppose system installed in Shanghai, so individual users can also enjoy 0. 4 yuan/KWH of subsidies, the deadline for five years.

a 5 kw system, input costs about 50000 yuan, annual output can reach 7000 degrees.

subsidies in accordance with national and Shanghai place, the owner in the first five years can get about 5740 yuan/year, after 15 years only enjoys state subsidies, 2940 yuan a year.

expects home electricity one year is about 4500 degrees, according to the peak electricity when 0. 617 yuan/KWH, save electricity, 2776 a year. 5 yuan.

because the system output of electricity, the user can to sell excess power to countries, due to the inconsistent around the desulfurization of coal price, forecasts the desulfurization of coal electricity price in Shanghai is about 0. 42 yuan/KWH, the annual income of 1050 yuan, comprehensive, system for five years before earnings of $9566 a year. 5 yuan, then 15 years, 6766 a year. 5 yuan, a year after 3826. 5 yuan, is expected to be available in 6 years to recover the cost of the whole system, and make a profit.

however, considering the actual situation, can panels typhoon damage repair, support maintenance such as cost, and the depreciation of panel itself, about 7 - Eight years to back this even more ideal situation. 。