Longi Solar Panel Reviews | 2023

The Longi Solar Panel reviews comprehensively evaluate both strengths and weaknesses. Despite starting in Australia in 2017, Longi has rapidly become a top seller. Notably, Longi, although a newer brand, achieved a trusted status in 2020, following SunPower and LG.

A Quick Review: The Longi Company History

Founded in 2000, by 2007 Longi boasted 100 tons of mono-silicon production capacity, enough for at least one gigawatt of solar panels. Moreover, rapid growth followed, with Longi becoming the world’s largest solar manufacturer, hitting an estimated 18GW production capacity in 2020, making it the biggest Solar Panel manufacturer globally.

As a result, Longi manufacturing plants successfully expanded to China, Vietnam, and Malaysia. Then, Longi solar panels entered the Australian market in 2017 and swiftly gained popularity as a top seller. Remarkably, Longi is the sole brand designated as an AAA-rated brand by ModuleTech Bankability Rating in the Q3 2020 ranking.

Indeed, Longi maintains an office in Sydney, Australia, a crucial factor to consider. This eradicates potential international frustrations and empowers customers with a national support helpdesk for emergencies. In case of warranty claims, the Australian Team promptly addresses issues within the country.

Reviewing Solar Panels by Longi

Longi Hi-Mo 3

Longi Solar Panel Reviews - Longi HiMO3

The Longi Hi-Mo 3 series is an average starting solar panel for homeowners who are looking to reduce the cost of their energy bills.

Longi HiMO3 key selling points;

  • Sizes 305W-325W 
  • Half Cut Cells 
  • Conversion Efficiency 19.6%
  • Monocrystalline PERC 
  • 6 BusBar
  • 10-Year Product Warranty 
  • 25-Year Performance Warranty 
  • Fluoride back-sheet
  • Solid PID Resistance 
  • Higher Energy Yield 
  • Reduced Hot Spot Risk 
  • Lower Operational Current 
  • Reduced Resistive Loss 
  • Temperature Coefficient 
  • First-Year Power Degradation <2%

Longi Hi-MO 4

Longi Solar Panel Reviews - Longi HiMO4

The Hi-Mo 4 is a great solar panel for the price. It offers higher efficiency conversion, high performance, the best warranty and innovative design.

Longi HiMO4 key selling points;

  • Sizes 350W-380W
  • Half Cut Cells 
  • Parallel Connection Design 
  • Conversion Efficiency of 20.9% 
  • Monocrystalline PERC
  • Fluoride back-sheet
  • Positive Power Tolerance (0~+5W)
  • Higher Energy Yield
  • Lower Operating Temperature
  • Reduced Resistive Loss
  • Lower Operating Current 
  • Reduced Hot Spot Risk 
  • 12-Year Product Warranty 
  • 25-Year Performance Warranty

Longi Hi-Mo X

Longi Solar Panel Reviews - Longi HiMOX

Hi-Mo X is different from other series as they use shingled cells. The technology incorporates solar cells that are cut and shaped to overlap each other. Such technology delivers higher energy output. This X series is the smallest size and produces much power compared to other modules.

Longi HiMOX key selling points;

  • Sizes 340W-360W
  • Mono Cells 
  • High Strength Frame
  • Conversion Efficiency of 20.6% 
  • Positive Power Tolerance (0~+5W)
  • Sleek Appearance (No Cell Gaps)
  • Reduced BOS Cost 
  • Longer Strings 
  • Reduced Cable Usage 
  • Monocrystalline PERC 
  • Solid PID Resistance 
  • 12-Year Product Warranty 
  • 25-Year Performance Warranty

Longi Solar Panel Reviews


Presently, these panels are well-priced with great value. Offering a high-quality product for an affordable price makes these panels stand out. They are offering mono-crystalline at a polycrystalline price.


Longi stands apart from other brands with its unique warranty offerings. They provide a 12-year product warranty and a 25-year performance warranty. Additionally, they ensure a performance rate of 84.8% after 25 years, unlike other manufacturers that typically offer 75-80%.


The performance level of Longi Solar Panels is exceptionally high, backed by a robust 25-year performance warranty that reflects their confidence. Longi exclusively manufactures mono-crystalline solar panels, a material known for superior performance. This choice indicates their commitment to delivering high-performance products.

Final Verdict

With over a decade of experience, Solar Air Energy has successfully installed thousands of Longi Solar Panels, and we’ve received no complaints. Because of this, we wholeheartedly recommend these panels to our customers, given their exceptional quality at affordable prices.

Connect with our experienced solar installers and request a free quote anytime. Please refer to our reviews – our track record speaks for itself!

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