Saving and efficiently using solar power is a problem for many countries around the world. In Vietnam, under the conditions that hydroelectric projects have been maximized, electricity projects must be faced with the pressure of environmental health, the development of energy sources is both considered to be effective.
According to the Vietnam Clean Energy Association, our country is one of the countries with the most sunlight on the world's solar radiation chart. In the Central Highlands and South Central provinces, sunny hours range from 2,000 – 2,600 hours per year. The average solar radiation is 150 kcal/m2, accounting for about 2,000-5,000 hours per year. Putting high-quality solar energy into business use, the manufacturing plant is contributing to solving the problem of saving energy and keeping the environment alive.
Compared to other natural power sources, solar power has overwhelming strengths. In order to produce 1MW of electricity, only 1 hectare of ground is needed and can be deployed in all parts of the country, especially using panels placed on roofs. In addition, the cost of installing solar power and the repayment period of solar power are becoming reasonable compared to the long-term benefits of this solution, making more and more households and especially businesses interested in investing.
Currently, an average of 7-8m2 of area will be equipped with a unit of 1kWp (kilowatt peak) of solar power with investments ranging from 1,000 - 1,300 dollars/kWp (lower if scaling up to several MWp) for a system that meets high quality standards, ensuring durability of 25 - 30 years, with full cost from design to construction. The application of solar power can help businesses reduce electricity bills from several hundred million to billions of dongs per year.
In offices, department stores, supermarkets, etc. These are medium-sized areas, and the appropriate solution is to install solar power grids. Daytime electricity consumption here is often very large, especially electricity consumption for air conditioning systems. With a building roof with an area of about 400m2 – 4,000m2 it will be able to install about 50 – 500kWp, equivalent to producing about 75,000 – 750,000kWh of electricity per year. The current business electricity price can reach more than 4,000 VND/kWh during the day, so the refund time is the shortest among all solar electricity users, which is ideal for businesses to invest.
Factories and factories are very large, so depending on the amount of electricity consumed, businesses can decide on investment capacity, usually from a few hundred kWp to several million kWp, supplying businesses with 150,000 kWh to several million kWh of electricity per year. Currently, since the price of electricity for the plant is a preferential producer electricity price (nearly 2,000 VND/kWh during the day), the repayment period is increased to 1.2 years compared to the business electricity; however, it is within reasonable limits considering the long-term investment nature of production and the solar system's life of 25 – 30 years.

Source: CafeF
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