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Do you want to save on electricity costs while ensuring a stable 24/7 energy source? The grid-tied solar power system with storage is the perfect solution! Not only does it maximize the use of solar energy, the system also stores excess electricity for use when it is dark. Let's learn about the grid-connected solar power solution with SNTek in this article.

I. What Is Grid-Tied Solar Power With Storage?

1.1 Concept of Grid-Tied Solar Power With Storage

On-Grid Solar System with Storage is a renewable energy solution that combines a grid-tied solar power system and a storage battery, helping to optimize the use of solar energy. In this system, photovoltaic panels collect solar energy and convert it into direct current (DC), which is then converted into alternating current (AC) through an inverter. The special feature of the grid-tied storage system is that excess energy will be stored in the battery for use at night or during times of lack of sunlight.

1.2 Benefits of Grid-Tied Solar Power Systems with Storage

• Reduce electricity bills: Grid-tied storage systems significantly reduce electricity costs because you will use solar power during the day and use excess energy at night.
• Self-powered energy: Especially useful for areas with unstable grid power or frequent power outages.
• Increase income from selling electricity: If you produce excess solar power, you can sell it back to the national grid and earn income from the excess electricity. According to the price from the Electricity Regulatory Authority, the purchase price of electricity from rooftop solar power systems in 2024 is set by EVN from VND 1,999/kWh to VND 2,231/kWh.
• Environmental protection: The system uses clean energy and does not emit CO₂, contributing to environmental protection.

II. Operating Principle of Grid-tied Solar Power System With Storage

2.1 Main Components of the System

1. Solar panels
   Photovoltaic panels are the main components that collect sunlight and convert it into electricity. These panels use semiconductor technology to activate the photovoltaic effect, creating direct current (DC).
2. Storage battery
   The storage battery is responsible for storing excess electricity during the day for use at night or when there is no sunlight. This helps families or businesses reduce the impact of sudden power outages and sudden power interruptions.
3. Inverter
   The inverter converts direct current (DC) into alternating current (AC), so that it can be used for electrical equipment in the home or business.
4. Monitoring system
   Monitoring system helps to track the performance of the system allowing users to check the amount of electricity produced, stored and consumed in real time. This helps to optimize energy usage and minimize waste.

2.2 Operation Process

1. Electricity
   When there is sunlight, the photovoltaic panels will absorb light and convert it into direct current (DC). This current is transferred to the inverter.
2. Electricity conversion and supply
   The inverter will convert DC current into alternating current (AC) to supply devices in the home or business.
3. Energy storage
   If the system produces more electricity than is needed, the excess electricity will be transferred to the storage battery for use at night or during times of low sunlight.
4. Using electricity from the storage battery
   At night or when there is low light, the system will automatically take electricity from the storage battery to supply the devices in use.
5. Selling excess electricity
   If the excess electricity produced is too large, the system will push the electricity to the national grid and can receive income from selling this excess electricity.

III. Pricing and Costs of Grid-Tied Solar System with Storage

3.1 Installation Costs

The cost of a grid-tied solar system with storage depends on the system's capacity and the type of equipment used. Below are the reference prices for common systems:

• 3 kWp System
  • Suitable for: Small households with low electricity consumption (around 1.5 million VND/month)
  • Reference Price: From 30 - 60 million VND
  • Advantages: Reduces monthly electricity costs by 30-50%, saves on initial investment costs.
• 5 kWp System
  • Suitable for: Households with average electricity consumption (around 2.5 million VND/month)
  • Reference Price: From 60 - 90 million VND
  • Advantages: Saves 50-70% on monthly electricity costs, allows excess electricity to be sold to the national grid.
• 10 kWp System
  • Suitable for: Large households or businesses with high electricity demand
  • Reference Price: From 100 - 150 million VND
  • Advantages: Significantly reduces electricity costs and increases income from selling excess electricity.

3.2 Payback Period

IV. How to Use a Grid-Tied Solar System with Storage

4.1 System Startup

The grid-tied solar system with storage will automatically operate when there is sunlight. Users do not need to intervene in this process. The system will automatically convert and supply electricity to devices in the household or business.

4.2 Monitoring and Supervision

• Use the monitoring system to check the performance of the solar system.
• Monitor electricity production, consumption, and excess electricity to optimize usage efficiency.

4.3 Maintenance and Periodic Inspections (maintenance time, cleaning frequency)

• Clean the surface of the solar panels to ensure maximum light absorption efficiency.
• Inspect key components such as the inverter, storage batteries, and related equipment to ensure stable system operation.

V. SNTek's Grid-Tied Solar System with Storage Installation Service

SNTek is a company specializing in providing high-quality grid-tied solar solutions with storage, helping customers save on electricity costs and optimize energy efficiency.

5.1 Free Consultation

SNTek offers free consultation services, helping customers choose the most suitable grid-tied solar solution with storage for their needs and budget. The consultation process includes:

• Survey: SNTek's engineering team will visit to survey the roof, installation location, analyze electricity consumption needs, and light conditions to propose the optimal solution.
• Consultation on appropriate capacity selection: Based on roof area and electricity consumption, SNTek will recommend a solar system with suitable capacity (3 kWp, 5 kWp, 10 kWp, etc.).
• Cost and benefit calculation: SNTek will provide a detailed cost breakdown, payback period, and potential electricity savings, helping customers make an informed decision.

5.2 System Design

After completing the survey, SNTek will proceed with designing the grid-tied solar system with storage with the following steps:

• Optimization design: The system will be designed for optimal performance, ensuring it is suitable for the roof conditions and the customer's electricity consumption needs.
• Selection of quality equipment: SNTek only uses internationally certified equipment from leading brands such as SolarEdge, RISEN, etc., to enhance system efficiency and durability.
• Storage system calculation: For the storage system, SNTek will calculate the appropriate battery storage capacity to ensure efficient electricity use both at night and on days without sunlight.

5.3 Installation and Execution

The installation process is carried out by SNTek’s professional technicians, ensuring the system is installed quickly, safely, and efficiently:

• Quick installation: The installation process takes about 1 to 3 working days, depending on the system capacity, allowing customers to enjoy the benefits of solar energy soon. (Enabling customers to experience the service quickly and provide feedback after using the product)
• Safety assurance: All installation procedures comply with strict safety standards, ensuring the safety of users and the solar system.
• Quality Inspection: After installation, the system will undergo thorough testing to ensure stable and efficient operation.

5.4 Maintenance and Post-Installation Support

SNTek provides comprehensive maintenance and post-installation support services to ensure your solar power system always operates at its best:

• Regular Maintenance: We offer periodic maintenance services to inspect and clean solar panels, replace components when necessary, and help the system maintain optimal performance.
• 24/7 Support: Our technical support team is always ready to answer any questions and resolve issues promptly. SNTek is committed to delivering absolute customer satisfaction with the best after-sales service.

5.5 Warranty Policy

SNTek offers a long-term warranty policy for your grid-tied solar system with storage:

• Solar panel warranty: Up to 10 years
• Inverter warranty: 12 years.
• Battery storage warranty: 5-7 years, depending on the type of storage battery used.

SNTek is committed to maintaining and replacing any faulty components throughout the warranty period.

VI. Reasons To Choose SNTek?

6.1 Extensive Experience

SNTek has over 10 years of experience in the renewable energy and solar power industry in Vietnam. We are proud to be one of the pioneering providers of high-quality grid-tied solar power solutions with storage, helping customers save costs and improve energy efficiency.

6.2 Product and Service Quality

• International-Standard Equipment: We use solar panels, inverters, and storage batteries from reputable brands, ensuring long-lasting performance and durability for the system.
• Dedicated Service: Our team of engineers and consultants is committed and professional, helping customers choose the best solution and providing timely support throughout the usage process.

6.3 Advanced Technology

SNTek continuously updates the latest technologies in the solar energy and renewable energy sectors. We use modern monitoring software and devices to track the performance of solar power systems, ensuring stable operation and optimizing energy output.

6.4 Competitive Pricing Policy