Process of production
Solar panels are made from the same raw materials as computer chips. Mass production process requires a lot of energy, toxic and harmful chemicals. Chemicals are mainly controlled by local laws and regulations. Some solar plants have installed solar systems that produce solar panels from clean energy generated by solar systems.

Impact on the power grid

As of December 2017, more than 31% of residents in the eastern Australian state of Queensland had rooftop solar systems, with an average installed power of more than 3.5 kW (the first in the world). But the high penetration of solar systems also poses problems for grid voltage. Residential areas have low electricity consumption at noon and mainly sell electricity to power companies. Conventional power grids do not consider bidirectional power transmission. When a large amount of electricity is transmitted back to the grid in the residential area, the voltage will gradually rise and may exceed the range of electrical equipment. Scientific research has found ways to solve this problem, but there are various cost considerations, such as adding additional voltage control devices to the medium voltage grid.

Implications for other countries or regions: Without systematic analysis and planning, a single incentive to promote the popularization of solar energy in residential areas will bring new risks. One of the better ways would be to promote the installation of solar systems by industrial and commercial users through taxes or other incentives. Because the main peak electricity consumption of industrial and commercial users is often during the day, the solar system generates electricity during the sunny day to supplement the industrial and commercial electricity and reduce the pressure on the grid.

Impact on energy investment and electricity bill management

Problems in real life are often complex and changeable, and the reasons are complicated. The same is true for energy investment and electricity bill management. There is no one-size-fits-all solution. Solar energy system investment may be a good option if: the local sun is abundant, the price of electricity is high and continues to rise, the government is strongly supported through financial or financial means, and the electricity can be sold back to the power company (Australia and Germany). Return on investment is often the main consideration in energy investments. But systematic examination, evaluation and analysis may find that a comprehensive package is most appropriate under market conditions. For example, building energy efficiency improvements, improvements in the operation of existing equipment, and investments in solar systems may provide homeowners with the best return on investment.