Solar power system with storage

Currently, many Vietnamese families opt for the installation of solar power systems with storage with the aim of maximizing solar power usage, effectively managing backup power, ensuring the normal operation of crucial household devices, and maintaining stability even during power outages or grid failures.

1. What is a solar power system with storage?

A Hybrid solar energy system is a combination of an independent solar energy system and a grid-tied solar energy system.

The Hybrid system is a grid-tied solar power system with reserve power stored in lithium batteries or accumulators, providing continuous and stable power to essential electrical devices such as surveillance cameras, refrigerators, freezers, computer systems, Wi-Fi, fire alarm systems, electric shutters, Koi fish ponds, etc. Additionally, it stores excess solar power generated during the day for use in the evening or during power outages.

For large-scale storage systems for businesses and power plants, an Energy Storage System (ESS) is employed. You can find more details about ESS solutions here.

2. What components are included in a solar power system with storage?

For a solar power storage system to operate efficiently, certain critical components directly affect its function and performance. Typically, a solar power storage system comprises three main parts:

+ Solar Panels (Photovoltaic Panels):

Solar panels consist of 8 components: aluminum frame, toughened glass, EVA film layer, solar cells, backsheet, junction box, electrical cable, and MC4 connectors. The primary function of solar panels is to absorb sunlight radiation and convert it into electrical energy to supply the system. There are generally two main types:

Monocrystalline panels: Constructed from high-purity monocrystalline Silicon photovoltaic cells, offering higher efficiency. Monocrystalline panels are uniformly black and relatively more expensive.

Polycrystalline panels: Made from polycrystalline Silicon cells, with a simpler production process and lower cost. Polycrystalline panels are dark blue, more cost-effective, and exhibit good durability and heat resistance.

+ Hybrid inverter

A Hybrid inverter incorporates the advantages and functions of both grid-tied and standalone solar power systems. The Hybrid inverter converts direct current (DC) into alternating current (AC) to supply electricity and charge the battery or lithium storage. During grid outages, the Hybrid inverter utilizes the stored energy in lithium batteries to continue supplying priority loads.

+ Battery or energy storage

This component stores excess solar power generated during the day for use at night or during power outages. Depending on the storage time and capacity required, you can choose either batteries or energy storage systems that best suit your system. Lithium storage batteries are currently the optimal choice due to their high charge/discharge cycles and superior durability compared to traditional batteries.

Thanks to the combination of Hybrid inverters and storage batteries, the Hybrid system will operate with higher efficiency. The energy transfer, charge/discharge processes occur more quickly, ensuring continuous operation of priority loads, and reducing damage when the power grid encounters issues.

In addition, a Hybrid system may include a DC/AC distribution panel, surge protection devices, power meter, Wi-Fi module, and an operation monitoring system.

3. How does a solar power system with storage operate?

– The Hybrid solar power system prioritizes the use of solar energy to supply priority loads in the home while simultaneously fully charging the lithium storage battery.

– Excess solar power, if any, is fed into the grid to supply other devices.

– When solar power is insufficient, the system supplements power from the grid to supply electricity to electrical devices and recharge the lithium storage battery.

– In case of a power outage, the system utilizes solar energy and electricity from the lithium storage battery to supply priority loads, ensuring a continuous and stable power source.

4. Pros and cons of a solar power system with storage

+ Pros of Hybrid systems:

Maintains stable power 24/7 for crucial devices: The system stores solar power in the lithium battery, providing peace of mind for nighttime or grid outage use. Essential household devices operate almost continuously without being affected by grid power. The transition time to backup power is less than 20ms, ensuring users do not experience disruptions.

Reduced dependence on the grid: When fully charged, the storage battery serves as a backup power source, minimizing dependence on the national grid. Thus, during power outages, failures, or voltage drops, devices continue to operate normally and stably.

Maximizes solar power usage: In the morning, when solar panels absorb maximum sunlight radiation to generate photovoltaic energy, the system charges the storage battery to use during the night or power outages, avoiding the loss of solar power production.

Saves on monthly electricity costs: With flexible energy transfer mechanisms, the system is configured to charge/discharge based on actual needs, allowing charging during off-peak hours and supplying power during peak hours. This helps customers on time-of-use electricity tariffs save on electricity costs.

Environmentally friendly alternative to generators: Hybrid solar systems operate automatically, quietly without noise like generators, do not use gasoline or diesel, and do not emit CO2, making them environmentally friendly.

+ Cons of Hybrid systems:

Higher initial investment costs compared to other solar power system types. Batteries and storage units tend to be expensive, increasing the overall upfront costs.

Hybrid inverters have multiple functions and require accurate parameter settings, demanding professional installation and setup by knowledgeable technicians familiar with system technology.

System capacity depends on load power and backup time. Therefore, to ensure the system meets the demands of household devices, operates stably without grid power, and provides backup power when needed, customers need to engage professional service providers to survey and advise on choosing a suitable Hybrid energy storage system.

5. Applications of solar power systems with storage

Due to the system’s ability to maintain stable, continuous power, it is often applied to units and businesses requiring energy security and high-quality power, such as data centers, telecommunication transmission stations, surveillance camera systems, healthcare facilities, elevators, etc. Large-scale solar storage projects can implement ESS solutions.

Given the relatively high investment costs, Hybrid solar power systems are usually installed in households and small-scale projects to optimize costs.

6. DAT Solar provides efficient and quality solar power storage solutions

For over 17 years, DAT Solar has continuously developed a comprehensive ecosystem, carefully selected globally high-quality products, and researched solutions to enhance efficiency for customers, partners, and solar energy investors.

Especially for Hybrid energy storage solutions, DAT Solar’s team of solar energy engineers and experts assess the consumption load parameters, existing electrical system structure, and the need for backup power for critical loads, usage duration, etc. They provide consultations and propose suitable Hybrid solar power storage system designs to efficiently manage power sources, maintain continuous supply for priority loads, and support other devices in the home.

So, why wait? Install a Hybrid solar power storage system with DAT Solar now. For more information on Hybrid solutions, contact our hotline at 1800 6567 (free of charge). We are ready to accompany and support you 24/7.