Hot weather causes increased demand for electricity and many people panic with electricity bills. If you know how to invest in a reasonable rooftop solar power system, you will not only reduce your electricity bill, but sometimes have excess electricity to sell to the electricity industry.
In the current hot weather, solar radiation reaches a high level, solar power systems produce the highest amount of electricity.
Greatly reducetelectricity bill
Not only in Ho Chi Minh City, in the Mekong Delta, solar power is also developing strongly.
Mr. Luu Minh Thien (living in Ward 9, Soc Trang City) – one of the pioneers in installing rooftop solar power systems in the locality – said that previously his facility had to pay for electricity about approx. 24 million dong.
Since November 2018, Mr. Thien has spent 1.1 billion VND installing a solar energy system with a capacity of 50kWp and since then he only spends about 6 million VND on electricity bills, saving 18 million VND/month. .
“In the near future, I will invest in installing about 50kWp more for the remaining factories. It is calculated that I will get my capital back after 5 years of investment, “- Mr. Thien said.
Similarly, Mr. Le Ngoc Quy (living in An Hoa Ward, Ninh Kieu District, Can Tho) said that in January 2019, he spent 62 million VND to invest in a solar power system with a capacity of 2.96 kWp. Since then, the surplus solar power has been used in the daily life of Mr. Quy’s family and sent to the national grid.
Mr. Quy calculates: “In 5-6 years, the capital is recovered, while the equipment is warranted for up to 25 years”.
Also in Can Tho, Southern Seafood Industry Co., Ltd (O Mon District) has boldly invested in solar power for production.
Mr. Nguyen Phuoc Loc, deputy director of the company, said that he signed a contract with Southern Electricity Corporation (EVN SPC) and another unit to install solar power systems. The company only reciprocates 10% of the installation cost, the rest is deducted from the kilowatts of electricity saved from the solar water heater within 5 years.
“In addition to not having to pay electricity bills of about 20 million VND/month for the water heating system, the company is highly appreciated by the energy audit. The money we save can set up a welfare fund to support the company’s officers and employees,” said Mr. Loc.
According to Mr. Huynh Minh Hai – director of Soc Trang Power Company, so far, there are 33 customers installing rooftop solar power with a total capacity of over 337kWp. Not only ensuring electricity use, these customers also have excess electricity to generate on the national grid on average of 4,454 kWh/month.
In Can Tho, there were 81 customers installing solar power. Mr. Tran Vi Duc, deputy director of Can Tho Power Company, said that the procedure to register to connect solar power to the national grid is quite simple.
Specifically, customers only need to send an offer to sell solar power to the local electricity. Electricity units will provide technical advice and survey, technical inspection as well as free 2-way meter installation for customers.
The entire amount of electricity from the solar system to the national grid will be recorded and paid according to current regulations.
1,200 Southern customers have invested in solar power
According to Mr. Lam Hoang Phuoc – head of the community relations department of EVN SPC, many localities supplied by EVN SPC have advantages in solar radiation.
Specifically, according to a survey by the Ministry of Industry and Trade, Ninh Thuan, Binh Thuan … have the highest solar radiation, so the solar power system invested in these areas maximizes power generation capacity.
According to Mr. Phuoc, in 21 southern provinces and cities, 1,200 customers have invested in solar power with an output of about 3 million kWh.
Many people wonder how much capacity each household installs a solar power system, enough for the family and has enough left over to sell to the electricity industry?
Mr. Phuoc said that depending on the area of the premises as well as the capacity of equipment using electricity in the house to calculate the capacity to be invested. However, with an average calculation of about 8m2 to invest 1kWp, an area of more than 40m2 is needed to invest 5kWp.
When solar power reaches its peak efficiency (from about 11am to 13pm), electricity produces about 4kWp. This capacity is enough to simultaneously supply about 10 light bulbs (200W), 2 air conditioners (2,000W), 1 refrigerator (500W) and TV, induction cooker, fan (1,300W total).
In case customers still use more electrical equipment at this time, the electricity system will automatically take electricity from the national grid to make up for it.
According to Mr. Trinh Quang Dung – solar energy expert, at night, when there is no more sunlight, the indoor electrical system will use electricity from the national grid. But thanks to the use of solar power, the amount of electricity used from the national grid system will decrease.
“A household uses about 600kWh of national electricity per month, but when there is solar power, the national electricity usage will be reduced by about half, helping to avoid the amount of electricity falling into the progressive ladder of high prices.
Especially during the time when customers don’t use electricity, solar power is sold to the national grid and collected monthly,” Dung said.
Maximum support for solar installers
According to Mr. Lam Hoang Phuoc, EVN SPC aims to increase the solar power capacity in 21 southern provinces in 2019 from 20mWp to 95mWp.
Mr. Phuoc said that there are currently many solar equipment suppliers with technical and financial support packages…
Specifically, there are units that offer support packages to ensure the generating capacity of the solar power system with an efficiency of 75-80%, if not, they will make up for the shortfall. These units are also associated with preferential lending banks…
Besides, the electricity industry will create all the most favorable conditions for customers to sell solar power.
Source: According to Tuoi Tre Newspaper