Distinguishing between Hybrid – Grid-connected – Independent solar power systems

Mô tả hệ thống điện mặt trời Hybrid

Each solar power system is designed with different goals and operating mechanisms, suitable for each specific usage need. Among them, hybrid solar power, grid-connected solar power with storage and independent solar power are the three most popular models today. To choose the right solution, users need to clearly understand the differences between each type of solar power storage system, including operation, investment costs and actual usage efficiency.

This article will help you distinguish in detail the three solar power models, thereby determining which is the most suitable choice for your family or business.

Why is it important to understand the types of solar power storage systems available today?

As solar technology continues to develop, users have more system options than ever before. However, not everyone clearly understands the difference between grid-connected, stand-alone, and hybrid solar power – the three main models that are commonly used in Vietnam.

Understanding each type of solar power storage system will not only help you choose the right solution for your needs, but also optimize investment costs, efficiency, and payback. Each model has its own advantages and disadvantages, depending on the purpose of electricity use, installation area, and the stability of the national grid.

Overview of 3 popular solar storage models

Currently, solar power models with storage are divided into 3 main groups: Grid-connected with storage, Independent, and Hybrid. Let's learn more about each system below to see the differences.

Grid-connected solar power system with backup

This is an upgraded version of the traditional grid-connected solar power system, equipped with additional storage batteries (batteries or lithium batteries). The generated electricity will be prioritized for the load, the surplus will be used to charge the battery, and when the grid power is lost, the battery will automatically supply back to the necessary equipment, helping to maintain continuous operation.

Advantages:

• Stable operation, significant power savings during peak hours.

• Can operate even during power outages, thanks to the backup battery.

• Easy to upgrade from existing grid-tie system.

Disadvantages:

• Higher cost than conventional grid-connected systems.

• Battery life affects long-term performance.

Independent solar power system

Off-grid solar power is a system that is not connected to the national grid, using storage batteries to store all the electricity for use. All the electricity generated from the solar panels will be charged into the battery, then the independent inverter will convert DC power to AC for the device.

Advantage:

• Suitable for remote areas, islands - places without electricity grid.

• Provides stable power even during extended power outages.

Disadvantage:

• Initial investment costs are higher due to the need to equip large capacity storage batteries.

• It is easy to waste electricity if the output exceeds the demand while the battery is full.

• Life and performance depend heavily on the storage battery.

Hybrid Solar Power System

The Hybrid solar power system is a smart combination of grid-connected and independent models, helping users take advantage of the advantages of both. The system has a hybrid inverter that acts as a "coordination center", automatically distributing electricity from solar panels, storage batteries, and the national grid flexibly.

Working principle:

• During the day, solar power is supplied directly to the load.

• If there is any surplus, the system will charge the storage battery.

• During a power outage, the hybrid inverter automatically switches to battery power without interrupting operation.

Outstanding advantages:

• Stable operation, not completely dependent on the grid.

• Reduce grid electricity costs by 70 - 80%.

• Active 24/7 power source, suitable for areas with weak power grid or frequent power outages.

Disadvantages:

• Investment costs are higher than grid-connected systems.

• Precise engineering design is required to achieve optimum performance.

When should you choose a hybrid solar system?Chọn hệ thống điện mặt trời Hybrid như thế nào là hợp lí?

Hybrid solar power systems are ideal for areas with unstable grid power or businesses that need a continuous power source for production. If you live in an area with frequent power outages, or your factory has important equipment that cannot be stopped (such as air conditioners, freezers, lighting systems, servers, etc.), then hybrid solar power is the perfect solution.

In addition, this system is also suitable for households that need to save electricity in the long term, but still want to maintain an automatic backup power source. With the ability to intelligently balance between solar power, grid power and storage batteries, hybrid is a new step forward in clean energy technology - helping users to be proactive with energy and have absolute peace of mind.

Investment costs and payback of hybrid solar power systems

The cost of installing a hybrid solar power system is about 20–30% higher than a conventional grid-connected system, due to the addition of storage and a multi-function inverter. However, the long-term economic efficiency is outstanding, as the system helps to significantly reduce monthly electricity bills and protect businesses from the risk of power outages.

On average, the payback period for the hybrid model ranges from 4–6 years, depending on the scale and usage needs. After this period, the solar power used is completely free for the remaining 15–20 years, helping to save hundreds of millions of VND in operating costs. Moreover, reducing dependence on the national grid also helps businesses be more proactive in production, limiting the risk of interruption or loss due to power outages.

Invest in efficient and secure hybrid solar power at Ego Solar

Ego Solar is a pioneer in providing complete hybrid solar power solutions, bringing sustainable efficiency to households and businesses. With a team of highly specialized engineers, Ego Solar always consults - designs - constructs - guarantees according to international standards, ensuring high efficiency, stable operation and absolute safety.Ego Slar lắp đặt điện mặt trời Hybrid

Ego Solar uses smart hybrid inverters, new technology storage batteries and international standard materials, helping the system operate effectively even in harsh weather conditions. We are committed to providing flexible solar storage solutions, maximizing cost savings and accompanying customers on the journey of green energy - sustainable future.
Ego Solar – Smart, economical and stable hybrid solar power solution for all projects.