Why Photovoltaic Power is Considered Green and Low-Carbon Energy

1. Significant Energy Efficiency

Under average sunlight conditions in China, a 1-kilowatt distributed PV system can generate around 1,200 kWh of electricity per year. This means Photovoltaic Power can effectively convert solar energy into electrical energy, providing a clean, reliable energy supply. Unlike fossil fuels, PV power does not require mining, transportation, or combustion, thereby eliminating energy losses and waste associated with these processes.

 2. Excellent Environmental Benefits

– Reduction in Coal Use and Carbon Emissions:  

  A 1-kilowatt distributed Photovoltaic Power can reduce coal usage by approximately 400 kilograms and cut carbon dioxide emissions by about 1 ton per year. Fossil fuel combustion is a major contributor to global climate change, and PV power can significantly reduce emissions of CO₂ and other greenhouse gases, helping to mitigate the effects of climate change.

– Comparable to Reforestation:  

  In terms of CO₂ reduction, installing 1 square meter of PV panels is equivalent to planting 100 square meters of trees. Trees absorb CO₂ through photosynthesis, releasing oxygen and playing a key role in improving the environment. PV power achieves similar environmental benefits without occupying land resources.

– Addressing Environmental Issues:  

  Developing renewable energy sources like Photovoltaic Power is an effective way to address environmental issues such as smog and acid rain. Fossil fuel combustion releases pollutants like sulfur dioxide, nitrogen oxides, and particulate matter, which are primary causes of air pollution and acid rain. PV power, however, produces no pollutants during its production or usage, significantly improving environmental quality.

 3. Strong Economic Benefits

– Reducing Energy Costs:  

  With continuous advancements and cost reductions, Photovoltaic Power is becoming as affordable as, if not cheaper than, traditional energy sources. In some areas, PV power has become one of the most competitive energy options, reducing energy costs for businesses and households and boosting economic efficiency.

– Creating Employment Opportunities:  

  The PV industry stimulates related industries, such as PV component manufacturing, installation, and maintenance, generating a substantial number of jobs. This not only supports economic growth but also enhances social stability.

 4. Energy Return Over the Lifecycle

While critics point out that producing PV components consumes significant energy, a full lifecycle assessment of PV cells provides a clearer picture. Producing PV cells requires energy, particularly in stages like industrial silicon purification and the production of high-purity polysilicon and silicon ingots. However, over their 20-year lifespan, PV cells continuously generate energy.

Estimates show that, under China’s average sunlight conditions, PV systems can return over 15 times the energy consumed in production. For instance, a 1-kilowatt rooftop PV system in Beijing with optimal tilt has an energy payback period of just 1.5 to 2 years—far shorter than its service life. In other words, the electricity generated during the first 1.5 to 2 years compensates for the energy consumed in its production, and the energy generated after this period is net output.

In conclusion, Photovoltaic Power is a green and low-carbon energy source with significant energy, environmental, and economic benefits. As technology continues to improve and costs continue to decrease, the future of PV power looks even brighter. By promoting and adopting PV power, we contribute to achieving global sustainable development.