Many power station investors often ask: how much is a set of household photovoltaic solar power generation?  The cost of a home photovoltaic system depends on three factors:  

1. Equipment cost.  Namely photovoltaic inverters, solar panels and so on.  

Different photovoltaic installation companies have their own pricing standards. At present, the reasonable construction cost of photovoltaic power generation system is generally about 8-10 yuan per watt.   Photovoltaic modules account for about 49 per cent of total investment, inverters and other electrical equipment for about 10 per cent, and cables and brackets for about 10 per cent each.  

2. Installed capacity.  

How to calculate the installed capacity of his home?  Xiaobian introduced it in a previous popular science article.  Mainly see two points: monthly electricity consumption and installation area.   It is more economical to determine how many kilowatts of photovoltaic power stations need to be installed according to the current actual electricity consumption.  It could also build slightly more powerful power stations so that surplus electricity could be connected to the grid and sold to the state.  

Calculation: Each kilowatt photovoltaic system can generate four kilowatts of electricity per day, requiring 10 square meters of installation area.   As long as a photovoltaic plant produces more electricity than a home uses, it can power all the appliances in the home.  

For example, 360 KWH of electricity is used in our home every month, and the roof can be installed on an area of 50 square meters.  

According to the calculation method, the home can be installed with 3KW PV system can meet all the monthly electricity consumption, installed area of 30 square meters.   If you want to use the whole roof of your home, you can install up to 5KW photovoltaic system, which can not only meet the electricity consumption of your home, but also have the surplus electricity to the national grid and sell electricity to make money.  

3. Subsidy policies.  

In addition, there are local subsidies, subsidies in different provinces and regions are not the same, this need to consult local policies.  

The benefits of home PV power generation include three parts:  

1, subsidies to make money: city and county subsidies (slightly different around), whether they use or sell, as long as the electricity has subsidies.  

2, save electricity: power generation for their own use, do not pay electricity, equal to make money.  

3. Make money by selling electricity: Sell the surplus electricity to the state at a price of 0.56 yuan/KWH based on the benchmark price of local coal-fired desulfurization units.  

(Electricity prices vary slightly.)  

There are two options for connecting home PV power to the grid:  

Self-use, surplus electricity to access the Internet (priority for their own use, surplus to sell to the state)  

Get all the electricity online (all the electricity generated is sold to the state)  

Family photovoltaic power generation generally choose the second, that is, spontaneous self-use, electricity Internet.  This is no need for batteries, can not generate electricity at night when the grid can be directly used