Installation of household roof solar system——Cost effectiveness

1. Hardware cost of household distributed solar system? How to calculate the investment cost of household distributed solar system?

The cost of household distributed solar system consists of equipment hardware cost and EPC cost. Among them, the cost of equipment hardware (including solar modules, grid connected inverters, cables, mounting brackets, meters, monitoring equipment, etc.) will change with the fluctuation of market supply and demand, technical progress and efficiency improvement of the photovoltaic industry, and is related to the size of the system capacity. The larger the system capacity, Some basic expenses in the system composition will be diluted, which will reduce the unit investment cost.

2. How about the operation and maintenance cost of household distributed solar system?

The operation and maintenance of the household distributed solar system mainly includes the mechanical installation of the system, the daily spot inspection of the electrical connection, the cleaning of solar modules, the analysis and replacement of some failed components, etc. If a professional operation and maintenance company is entrusted to carry out the operation and maintenance, the cost is about 0.06~0.1 yuan/watt/year(in China). Selecting a big brand operator can also provide property all risks for the power station to avoid losses caused by force majeure, At the same time, its professional operation and maintenance services can also ensure the power generation.

3. How much does the average family need to invest to install and use this product?

Household users need to choose according to their own needs when installing household distributed photovoltaic systems. Due to different system equipment, functions, brands and services, the investment costs are also different, generally about 3.7-3.9 yuan/W (based on the average level in 2021). According to different lighting conditions,Feed-in tariffs and local subsidies in different regions, the cost can be recovered in 8-10 years. As the system cost decreases,the recovery period will shorten.

The average annual power generation utilization hours of household solar in China vary from 1000-1500 hours (depending on the light resources, there will be differences). The specific investment and power station income vary according to different construction models.