- 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.
- With the BESS (Battery Energy Store System), the system will ensure that businesses are always supplied with electricity 24/24 to ensure uninterrupted production activities.
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).

- Working principle:

+ The system prioritizes using DC power from solar panels to convert to AC power to supply electricity-consuming equipment, and at the same time to charge the battery if the battery has not been fully charged.
+ If the solar system generates excess power, it will be connected to the grid to sell electricity to EVN. When the power from the solar panels and battery is short, the system will automatically draw more electricity from the grid to supply electrical equipment and charge the battery.
+ In case of a power outage or customers disconnecting the system from the grid intentionally, the Hybrid Solar Power System will use power from solar panels and backup power from batteries to supply equipment.
OPERATION MODE: There are three basic modes in the PV Master App that end users can use :
+ General mode: During the day, the energy generated by the PV system is used in the following order: supply loads; charge the battery; export excess electricity to the grid. At night, the battery powers the loads. If battery power is insufficient, the system is designed to automatically switch supply sources to the grid to keep the loads energized.
+ Backup mode: In this mode, the battery is only used as a backup power source when there is a power outage on the grid, and as long as the grid is available, the battery will not stop powering the load. The battery will be charged by electricity generated by the PV system or from the grid.
+ Economy Mode: Customers can set charging and discharging times according to the grid's peak and off-peak rates and electricity consumption patterns.
+ With INS' storage solution for residential and businesses, there are three main applications:

- Increased auto-consumption: the battery system stores excess energy generated from the PV array to put solar energy into the grid and limit solar energy production. When solar energy production is low, the battery will discharge to support the consumption load.

- Provide backup for critical loads: The battery stores solar or grid energy for needs during power outages. Loads such as refrigerators, routers, lights, computers, and other critical equipment can be powered up when the grid is off. The system can automatically switch to backup mode within 8 seconds.

- Time of Use (ToU): By setting the time and discharge level, the battery can be left unused by using the electricity generated at the lowest level and discharged to the electrical load during the peak time.

- Solar Panels.
- Hybrid inverter, large capacity hybrid inverter such as BT, ESA, BTC.
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- Battery for storage
- Trusses, brackets, wires, accessories.
- Electrical accessories such as cables, lightning protection devices, electrical cabinets, etc.

- Cost savings :

+ Ensure stable power supply 24/24, ensure uninterrupted production activities.
+ 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
+ Increase the aesthetics of the factory.
+ 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)

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, battery capacity ...

- Ensure compatibility between devices: between panels and inverter, inverter and battery.

- Set proper operating mode, charge and discharge duration to get the highest economic efficiency.

If you need more information on the "Storage Off-grid Solar Power" solution or related products, please contact us immediately.