Longi Solar vs JA solar

Since the last decade, there has been a rise in global warming and its disastrous effects like floods, storms, etc., and the exhaustion of non-renewable energy resources has precipitated a substantial transition towards utilizing renewable energy sources, notably solar panels. Australia, blessed with copious sunshine, has emerged as an optimal location for solar panel installation, establishing itself as a prominent global leader in solar panel adoption.

Due to the elevated demand for solar panels, the market has become flooded with multiple solar panel brands and models, posing a challenge for homeowners and businesses in selecting the most suitable solar panel system for their specific needs.

We have got you! Read on further this in-depth comparison between the two most popular solar panel brands: Longi and JA Solar. So, let’s dive in and make an informed decision.


JA Solar Panels Vs Longi


Longi Solar is one of the prominent manufacturers of high-efficiency solar panels, boasting a global production capacity exceeding 20 GW. Longi solar panels have earned a strong reputation for their exceptional efficiency, durability, and impressive low-light performance, positioning them as a favored choice across residential, commercial, and utility-scale solar installations. While it is true that Longi panels may come with a somewhat higher initial cost when compared to less efficient alternatives, their extended lifespan and substantial energy cost savings render them a valuable investment for those in pursuit of a top-tier solar panel solution.

Key Features

Monocrystalline Technology: Longi’s solar panels are crafted using premium monocrystalline silicon, surpassing the efficiency of polycrystalline silicon.

Outstanding Efficiency: Longi’s solar panels achieve industry-leading efficiency levels, with select models exceeding 22%.

Technical Specs

Module Power Output Efficiency (%) Product Warranty
HI-MO 5m 415W 21.3 12 years
HI-MO 5m 550W 21.3 30 years
HI-MO 4m 460W 21.2 25 years
HI-MO 4 455W 21.9 30 years



  • Longi’s solar panels are engineered to endure harsh weather conditions, ensuring consistent performance in various environments.
  • Longi’s solar panels exhibit resilience in low light conditions, making them especially valuable in regions with unpredictable weather patterns.


  • Longi’s high-efficiency solar panels may come with a higher price tag compared to less efficient alternatives, potentially catering to a specific budget range.

Awards & Certifications

  • In 2021, Forbes ranked Longi as the world’s leading solar technology company in terms of value.
  • Longi’s manufacturing facilities hold certifications for quality management (ISO 9001), environmental management (ISO 14001), and occupational health and safety management (OHSAS 18001).
  • Longi’s products carry certifications compliant with various international standards, including TUV, UL, CSA, CE, and JET.


JA Solar

JA Solar is a renowned global manufacturer with over 18 years of expertise in producing high-quality solar power products. Their state-of-the-art solar panels are known for delivering outstanding performance and durability, catering to a wide range of applications, from residential to commercial and utility-scale solar installations.

Although JA Solar’s pricing may be somewhat higher compared to other solar panels, their advanced technology and long-term warranties render them a dependable and valuable choice for generating clean, renewable energy.

Key Features

Exceptional Efficiency: JA Solar panels are recognized for their impressive efficiency, capable of reaching efficiency levels as high as 22.3%. This makes them an ideal choice for individuals seeking to maximize power output within limited space.

Robust Durability: JA Solar panels are engineered to withstand severe environmental conditions, undergoing testing for wind resistance of up to 2400 Pascal and the ability to handle snow loads of up to 5400 Pascal.


Technical Specs

Module Power Output Efficiency (%) Product Warranty Linear Power Warranty
JAM 54DA1 400-425/GB 400-425 Wp Up to 21.8 12 years 30 Years
JAM 54DA1 410-435/GB 410-435 Wp Up to 22.3 12 Years 30 Years
JAM 54DA1 600-625/GB 600-625 Wp Up to 24.4 12 Years 30 Years
JAM78D30 395-420/6B 395-420 Wp Up to 21.5 12 Years 30 Years
JAM78D30 400-425/6B 400-425 Wp Up to 21.8 12 Years 30 Years
JAM78D30 585-610/6B 585-610 Wp Up to 21.8 12 Years 30 Years



  • JA Solar panels excel in low light conditions, ensuring power generation even on cloudy days.
  • JA Solar panels offer a 12-year product warranty and a 25-year performance warranty, providing customers with peace of mind regarding their panel’s coverage.



  • JA Solar panels may have limited availability in certain markets, which can make sourcing them a challenge for some customers.


Awards & Certifications

  • In the 2020 PV Module Reliability Scorecard, JA Solar was recognized as a “Top Performer” by DNV GL and PVEL for the outstanding performance of their modules.
  • For the third consecutive year in 2021, JA Solar received the “Top Brand PV Europe Seal” from EuPD Research.
  • In the 2019 PV Module Reliability Scorecard, JA Solar was again acknowledged as a “Top Performer” by DNV GL and PVEL for their module’s exceptional performance.


The Bottom Line

Deciding between Longi and JA Solar panels depends on solar users’ specific requirements and priorities. Both manufacturers offer high-quality solar panels with their own set of advantages. It is a good idea to get quotes from both manufacturers and evaluate the specifications of the individual models to make an informed decision.

At Ultimate Solar Energy, we make your decision-making process so simple. We design customized solutions based on your requirements, using only the most premium products.

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