The standards of a solar panel will guarantee the reliability and quality of the product. So how do you choose a solar battery? Let’s find out with Suntimes the evaluation criteria and select a solar battery for a business project.

Origin of solar battery

With the remarkable advancement in technology, most solar panels used in the world are made in China. However, today, the stereotype of poor-quality Chinese products makes many users hesitate to choose solar battery products.

According to Bloomberg, to choose solar panels, investors often rely on market rankings and ratings.

Solar battery manufacturer

Currently, in the world, there are many manufacturers of solar batteries, in which, the top 5 brands that provide the best batteries according to Bloomberg’s criteria are:


Each year, LONGi supplies more than 30GW of solar cells, accounting for a quarter of the global market demand, and is considered the leading brand in terms of output and quality. With a history of 20 years of development, at present, LONGi has 7 battery factories, 4 photovoltaic cells factories, and 6 representative offices in many countries around the world.

Jinko Solar

Jinko Solar is currently the number 1 brand globally in terms of quality, receiving the favor of thousands of customers. Up to now, Jinko Solar owns more than 15,000 employees at 9 production facilities and 21 subsidiaries around the world. Jinko products always meet the criteria: Efficiency – reliability – safety, in quality.

JA Solar

JA Solar’s full name is JA Solar Holdings Co., Ltd. (Nasdaq: JASO), one of the world’s most efficient solar cell manufacturers, won the “PV Seal 2018 Top Brand” award from EuPD Research.

Canadian Solar

Canadian Solar was established in 2001 in Canada as a brand with nearly 20 years of pioneering in solar power. Canadian Solar has won many awards, such as Top Value Manufacturer ranked by Bloomberg NEF in 2020; Tier 1 solar company according to Bloomberg NEF 2017-2020; The leading company in PHOTON PV TRIATHLON 2017….


Risen Energy Co., Ltd is one of the pioneering brands in the solar energy industry. This company was established in 1986 and listed on the Chinese stock exchange in 2010. Users always appreciate risen’s products for their quality.

Solar cell manufacturing technology

In the solar cell market, in addition to the prevalent monocrystalline, polycrystalline, and thin-film production technologies, there are still other new production technologies with many outstanding advantages. Representative:

Technology 1: PERC – Passivated Emitter Rear Cell

This technology increases operational efficiency, ROI conversion, and savings through the mechanism of mounting a film on the back of the photocell. This improves light absorption, increases internal reflection while reducing electron recombination.

Technology 2: Bifacial – Dual-sided panels and cells

It can be understood simply that this is a technology for making double-sided solar cells, increasing the ability to absorb solar energy and increasing the power generation capacity of the panels.

Technology 3: Multi Busbar – Multi ribbon and wire busbars

This can be seen as a new step in solar power technology, helping to improve the number of busbars in the battery, increasing electricity generation capacity.

Solar battery capacity

The capacity of each solar panel is also one of the most important criteria for investors to choose and design solar power systems and projects. This affects the effectiveness and investment results of each project.

Usually, in the same specific construction area, The larger the capacity of the solar panels, the more electricity they can produce. Thereby improving the ability of the power system as well as the investment efficiency of the projects.

Solar cell performance

Solar cell efficiency is the ratio between electromagnetic energy and sunlight energy. By measuring the amount of light, it is possible to calculate the actual amount of electricity the solar cell converts. The defining result is the solar cell efficiency, measured as a percentage.

With the same size solar panels, the more electricity generated, the higher the efficiency. Therefore, to maximize the use of solar energy and save costs, investors need to choose the correct solar cell performance.

Quality certification

High-quality and safe solar panels must undergo and meet rigorous testing on manufacturing processes and international standards.

IEC standard: Confirms the product has met the minimum requirements for safety when operating.

Standard IEC 61215: Quality assurance certification that panels have met basic electrical specifications and can operate stably.

Standard IEC 61730: Certification of occupational safety, ensuring the ability to prevent electric shock, fire risk, and injury to workers during the operation and use of the system.

TUV certificate: This certificate ensures that solar panels have been tested and passed product technical quality requirements.

 UL 1703 Certifications and Standards: This standard guarantees that a product meets all product details and specifications for safety and quality.

Policy & Warranty period

When choosing a solar battery supplier, investors must pay attention to product warranty policies & time.

Currently, there are two different types of warranties for solar batteries: capacity warranty and product warranty.

Power warranty: Suppliers and manufacturers will commit to solar panels that can maintain at least 80% of the electricity output of their original capacity for up to 25 years.

Product warranty: This is a warranty policy that manufacturers will commit to supporting businesses and investors in overcoming system errors, defects on panels,… Product warranty period Products usually last from 10-12 years, depending on the manufacturer.


The solar panel will be decided on Price VND/Wp criterion. This is an essential criterion for investors determining their investment value and making a reasonable investment.

Investors can choose high-capacity panels. Help save space on the roof and use it for other purposes, or you can select boards with a lower capacity if you have a lot of installation space to save on costs.

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