There Are Roofs, Policies, Also Home Solar Power

- Mar 07, 2019-

Not only because of the abundant roof resources, but also because of the poverty alleviation policy that relies on photovoltaics to help the poor. The reasons for the outbreak of the rural PV market are much deeper than you think.


1. Low energy density characteristics are naturally suitable for rural areas.

Renewable energy has the characteristics of low energy density. In rural areas, the vast majority of electricity users actually do not need high energy density. Taking residents as an example, according to the power of 5KW per household, photovoltaic power generation requires about 25 square meters of PV solar modules, which occupies a roof area of about 50 square meters, which is satisfied by most residents' houses.

Rural areas are vast in area, low in population density, and low in electricity consumption. They are characterized by low energy density. Therefore, renewable energy sources such as photovoltaics solar, wind power, and biogas are naturally suitable for use in rural environments.


2. Electrification in remote rural areas depends on photovoltaics

Although the country proposed comprehensive electrification in rural areas in 1998, it was extremely difficult to achieve “village electricity supply” through large-scale construction of power grid lines when covering to remote areas. The difficulty of the power supply line, the large power supply radius, and the low power supply voltage make the power-on project almost impossible to advance. Therefore, solar power generation has become a necessity in these areas.

At the same time, the realization of PV power generation in the home is short, providing farmers in remote areas with the opportunity to use electricity before implementing “village electricity”.

 rural areas home solar power energy

3, the full electrification of the electricity area needs more solar

At present, most of the areas living near cities or towns have already been electrified and connected to electricity. However, compared with the urban power grid, the current rural electricity consumption is indeed small, and the rural power transmission distance is long. If the power sector reserves extra power for the rural future power demand, the cable cost and laying cost will become double.

However, with the development of the economy and the improvement of rural living standards, the number of household appliances in the peasants will increase, and the electricity consumption will naturally increase. The rural areas will be the main source of new power demand inChinain the future, and the main areas of future power demand. In another ten years, we will find that the electricity consumption in rural areas will increase four times more than now!

In order to meet the new power demand in rural areas, the country has started the power grid renovation project since this year, but this is only for poor areas, and it is costly. If the grid is transformed in all rural areas, it will be an astronomical number! Moreover, the cost of photovoltaics is now declining, and the use of new energy sources to achieve electrification in rural areas is more economical than the overall transformation of the national grid.


4, environmental improvement also requires photovoltaic

In addition to the cost issue, the large demand for rural electrification will bring another problem, that is, the huge increase in demand for electricity means a huge increase in new emissions. Therefore, if the rural electricity demand is still extended by the existing thermal power grid, it will mean a large increase in carbon emissions and dust emissions. Considering that the ecology of rural areas is more vulnerable to climate change than cities, even if the national grid expansion driven by thermal power can economically meet the demand for electricity in new rural areas or urbanization, rural areas cannot afford this climate change and environmental impact. The environmental degradation caused by the increase in rural electricity demand, such as smog, will also have unbearable consequences for the urban population.

Considering the low energy density characteristics of rural areas, the household solar power system that generates electricity on the user side by using the “out-of-the-box” method can greatly save the cost of the transmission line and reduce the transmission loss. It can be said that every installation of a megawatt of photovoltaic power station in rural areas is equivalent to reducing the emission of two megawatts of thermal power, and definitely not a one-to-one relationship.


In view of the above reasons, the responsibility of rural electrification will inevitably fall on new energy sources such as photovoltaics. Finding ways to replace thermal power generation and long-distance transmission lines with new energy sources and bring electricity and other forms of energy to rural areas should be a clear mission in the government and society's strategy for rural development in the coming decades.