- Vietnam's economy is thriving, causing the demand for electricity to increase, especially in factories and industrial parks - where the monthly electricity bill to operate the production process is not small. Installing a rooftop solar power system cuts this huge expense and more.
- In terms of finances, solar power helps businesses reduce up to 90% of monthly electricity costs, especially during the peak hour when the electricity price is 4587d/kWh for business and commercial sectors. These savings depend on the available roof area and investment.
In addition, the excess electricity that is not used up also brings a significant income for businesses during 25-30 years. Not to mention that the roof with solar panels will be insulated, thereby helping to reduce the electricity consumption by the air conditioning system.
Owning a solar power system also enhances prestige and brand value. Businesses applying green technology have more opportunities to attract investment capital as well as increase the number of customers (75% of customers prioritize green products, according to a survey by Nielsen).
Environmental benefits are also a factor you cannot ignore. With a system of only 200 kWp (equivalent to about 607 panels) on the roof of the factory, it will produce more than 24,000 kWh/month and reduce emissions by 15 tons of CO2/month, equivalent to 700 trees planted. If you care about the environment and future generations, you will not be able to miss these impressive numbers.

- Solar energy is absorbed directly through photovoltaic cells from solar panels, creating DC current.
- Through the grid-tied inverter (DC/AC inverter on the grid), the DC current is converted into AC, which has the same frequency and phase as the national grid so that it can connect to the grid.
- These grid-tied inverters are programed to automatically find the Maximum Power Point Tracker MPPT of the panels, in order to optimize the power received from solar systems.
- The synchronization of national grid power and solar power source will be conducted automatically, in which solar power is prioritized to supply the load.
In details:
 - When the solar power generated equals the load capacity, it will consume all the electricity of the solar power system.
 - When the load capacity is greater than the solar power generated (even at night, when the solar energy system does not generate electricity), the load will consume electricity from the grid.
 - When the load capacity is smaller than the solar power generated, the excess electricity will be sold to the grid through the electric meter and recorded by the 2-way meter for EVN.
 - The system only works during the day (almost 100% dependent on sunlight), so the system will hibernate at night and return to normal operation the next day when it is sunny.
 - The grid-tied inverter has the function of automatically disconnecting the power when there is a power outage from the grid, halting supply to the load to ensure technical safety when the power grid is being repaired.

- Solar Panels.
- Grid-connected DC-AC Inverter. Similar to the solar power system for residential, here we use equipment with larger capacity such as MT Series, HT Series, SDT G2 Series, SMT Series, BTC Series.
- 2-way meter ( National Grid Agency will buy surplus electricity from the solar system) “Decision 13/2020/QĐ-TTg 2020 | INCENTIVES FOR DEVELOPMENT OF SOLAR ENERGY IN VIETNAM
- Trusses, brackets, wires, accessories.
- Smart monitoring technology through smartphone.

- Cost savings :  
 + Investors can save up to 90% of electricity and can sell surplus electricity to EVN  
 at the price of 1,940 VND/kWh.
 +The roof is insulated with a solar panel system helps to reduce the heat  
  for homes, production areas, and offices and reduce the 
 power consumption of the air conditioner.
 + Low maintenance costs: Solar power systems do not use batteries, so you can save cost on investment and maintenance
 + Increase the aesthetics of the factory.
 + Hệ  Solar power system has a long lifespan.
 +The system does not use batteries, so businesses do not have to spend money on investment and maintenance of batteries.
 +In addition, EVN's two-way meter is the ideal solution to replace the investment in an electricity storage system. The system has a lifespan of up to 30 years for long-term economic and environmental performance.
- BENEFITS FROM THE GOVERNMENT'S POLICY OF PURCHASING SOLAR POWER FOR 20 YEARS
The energy generated from solar will be recorded by the two-way meter. If the amount of solar power generated is greater than the electricity consumption of the home or business, the excess electricity will be offset from the electricity bill. The total surplus electricity for the whole year will be purchased by EVN at the price of 1,940 VND/ 1 kWh. (Expired from December 31, 2020)

- Cons : 
+ Large initial investment cost.
+ Unstable, dependent on weather, at night factories still have to depend on grid electricity.
+ Takes up a lot of roof space.

- Calculate and select equipment in accordance with the needs of the customers: power consumption, load capacity, auxiliary load capacity (back-up load), back-up load power using duration, ...
- Ensure compatibility between devices: between panels and inverter. 
- Set proper operating mode to get the highest economic efficiency.

INS Energy Company (former name is Solar INS company), full name is INS Energy Technology Company Limited, was established in 2018.

With the goal of becoming a leading company in providing solutions and products in the field of clean and renewable energy, INS Energy has built a team of highly qualified, experienced, technicians and engineers that ready to meet the needs of customers in the most comprehensive and affordable way.
Over 3 years of establishment and development, INS ENERGY's energy products and solutions have been present in many large projects. We have also developed a business cooperation network with more than 100 Dealers / Distribution & Installation Partners nationwide.