Within the initial phases of research, you discover that LONGi solar panels are the world’s largest solar module manufacturer by volume (BNEF Q4, 2020). Not only is volume an impressive gauge, LONGi are now proving to be one of the most innovative solar brands and the results are beginning to show in real-world conditions. However, what does all this mean for you? And, how should it affect your solar buying decision?


Primarily a monocrystalline cell manufacture, est 2000, LONGi Solar clearly has the pick of the bunch when it comes to cell selection for module manufacturing, and the performance is phenomenal for the price point.

Did you know? As more than just another module manufacturer, LONGi supply monocrystalline cells many alternative leading module manufacturers seeking a high purity yet affordable monocrystalline cells to incorporate within competing solar module designs.

Such a practice is quite common amongst many industries. A similar comparison where cell trading amongst manufacturers is common is lithium solar batteries. LG Chem, BYD, Panasonic, Samsung SDI and CATL (to name a few) supply lithium battery cell technology to renowned brands such as TESLA, SENEC, Sungrow, Huawei and more.

Discover the detail. Get your copy of the latest Perth Solar Warehouse Solar Price list delivered direct to your inbox. 

Which to avoid?

As with all brands in the Perth Solar Warehouse Ultimate Guide, it’s generally recommended that residential homeowners avoid 72-cell/144+ half-cell sized solar panels and opt for 60-cell/ 120-132 half-cell solar panels. A higher watt-class in the larger panels is often quite appealing for the same price (per/watt), however, these are not more efficient as the module dimension is simply increased.

With no increased efficiency the additional power is achieved simply by adding an additional row of cells. The result, 72-cell solar panels are heavier to accommodate on the intended roof structure possessing 12 additional 6-inch cells (or similar). In-turn adding greater weight to a residential roof structure in a singular area is not ideal for reduced load bearing residential roof types.

Residential 60-Cell (120 – 132 half-cell):

Size (W)
Effcy (%)
Wt (kg)
LR6-60M 60-cell, mono
285 – 305 W
17.4 – 18.7
LR6-60PB (black) 60-cell, mono
285 – 305 W
17.4 – 18.7
LR6-60HPH (Hi-MO 3) 60-cell, mono
310 – 330 W
18.7 – 19.9

Commercial 72-Cell (144 – 156 half-cell):

Size (W)
Effcy (%)
Wt (kg)
LR6-72PE 72-cell, mono
350 – 370 W
18.1 – 19.1
LR4-72HPH 72-cell, mono
415 – 455 W
19.6 – 20.9
LR4-72HPD 72-cell, bifacial, mono
425 – 455 W
19.6 – 20.9

Related Article: Why you should avoid 72-cell/144+ half-cell solar panels, discover >

LONGi Solar Panels by Perth Solar Warehouse

Which to consider?

To ensure ease of comparison between brands, 60-cell solar panels are where most residential homeowners should be looking. Considering the above 72-cell LONGi solar panels efficiency, the below similar technology can easily be identified, LR6-60HPH. 

What does this mean? Despite the higher watt class of the 72-cell solar panel, an equal portion of roof surface area is utilised to achieve the desired system capacity with 60-cell solar panels even though there are more panels. Accommodating better weight distribution and ease of design where space limitations/shading exist.

Residential 60-Cell (120 – 132 half-cell):

Size (W)
Effcy (%)
Wt (kg)
LR4-60HPH (Hi-MO 4) 60-cell, mono
350 – 380 W
19.8 – 20.3
LR6-60OPH (Hi-MO X) layered-cell, mono
340 – 360 W
19.4 – 20.6

What is the warranty?

For ease, all LONGi solar panels Perth homeowners receive are equipped with an above-average 12-year product warranty. The LONGi solar panels product guarantee is your assurance of product integrity over time.

Ensuring power output over time is an industry-standard 25-performance guarantee. Most interestingly, The comprehensive nature of LONGi’s solar panel warranty ensures product and service support in the event of a warranty claim. Refreshing, as solar panel warranties by alternative brands often neglect the service component leaving end-users with additional expense in the event of a warranty claim.

Product warranty:

All LONGi solar panels

Performance warranty:

P/A after
All LONGi solar panels

Period: Degradation period, Year-1: maximum warranted output degradation in the first year, P/A after: maximum warranted output degradation per annum within the nominated Period after Year-1.

Where are they made?

As the world’s fastest-growing solar module manufacturer and member of the Silicon Module Super League, LONGi solar panels are manufactured from plants established in China, Malaysia and India with expansion to North American manufacturing a very likely prospect.

As a premium module manufacturer, LONGi solar panels are derived from cutting-edge, fully automated production facilities with LONGi’s renowned high-quality material selection.

Longi Solar Panel Factory

What do they cost?

The rise in demand for LONGi solar panels internationally is due to the incorporated value. Exceptional quality and performance at a price point where alternative makes must utilise inferior complementary to compete.

LONGi has succeeded in offering such outstanding value by manufacturing through its fully integrated PV Solar Value Chain. Manufacturing every element from mono ingot to mono wafer with the LONGi Green Energy division, then producing mono cells to mono modules with LONGi Solar.

Size (kW)
Price (from)
Price (to)
Price List
Price List
Price List

1. Cash payment prices listed for single-level and single roof face within PSW Installation Zone 1 after STC zone 3 subsidy has been applied. Additional installation costs may apply (inquire). Nominated price range considers all non-P.O.A solar inverter options available within the Perth Solar Warehouse range and listed “Which To Consider” LONGi Solar panels. For the most up to date prices customers should complete the “Price List” form and a copy of the Latest Perth Solar Warehouse Solar System Price List will be emailed.

As always, price differences vary depending on the preferred inverter selection, installation specifics, power supply, applicable subsidies and more. Above is a general guide for the Perth & Bunbury, Western Australia region with the current STC Zone 3 subsidy applied as a point of sale discount.

Which is ideal for you?

Fortunately, today there is exceptional value and reliability in less expensive solar inverter technologies. A PSW popular staff pick is a product pairing of the LONGi Hi-M0 4 with the feature-packed Huawei solar inverter range.

At a phenomenal price point, this product combination offers outstanding affordability for an overall good quality product. As always, this may not be ideal for every scenario, and alternative inverter combinations could be better suited based on specific requirements.

Featured LONGi solar panels:
Longi Hi-MO 4 370W Solar Panel


Hi-MO 4 - LR4-60HPH
  • 370 Wp.
  • P-Type, half-cell mono.
  • 20.3% module efficiency.
  • Temp COEF -0.37%/oC.
  • 1755 x 1038 x 35mm
  • 12-yr product warranty.
  • 25-yr perform warranty.

LONGi Hi-MO 4. Why we love it. One of the better low-cost solar panel options in terms of overall product quality and performance in real-world conditions. Expect heigh-end yields from a relatively low-cost solar module.

LONGi Hi-MO Panel by Perth Solar Warehouse


Hi-MO X - LR6 60OPH
  • 350 Wp.
  • P-Type, layered cell mono.
  • 20% module efficiency.
  • Temp COEF -0.37%/oC.
  • 1762 x 994 x 35mm
  • 12-yr product warranty.
  • 25-yr perform warranty.

LONGi Hi-MO X. Why we love it. Shingled (layered) cell designs were a relatively new concept for most manufacturers in 2019/2020 and the LONGi Hi-MO X range certainly did not disappoint.

Featured inverter options:

Two popular inverter combinations to pair with LONGi solar panels are those which boast all-round value in the SMA and Huawei options. Possessing ultra-high-end specifications, when pairing with your preferred LONGi solar panels, end-users enjoy a comprehensive package proven to perform in the testing Australian conditions. 


Sunny Boy AV-41
  • 1-phase.
  • 3, 5 kW.
  • AC battery compatible.
  • WiFi/ Ethernet LAN.
  • Sunny Portal by ennexOS.
  • 97% efficiency.
  • 10-year (5+5) warranty.

SMA Sunny Boy. Why we love it. German ingenuity surpassing the decades. SMA Sunny Boy is without a doubt the most recognised inverter model internationally due to dependable performance over time. An Australian favourite.


  • 1-phase.
  • 3, 5 kW.
  • AC & DC battery compatible.
  • WiFi/ Ethernet LAN.
  • Huawei FusionSolar.
  • 98.6% efficiency.
  • 10-year warranty.

Huawei L1. Why we love it. Potentially the most innovative inverter technology in recent years. Huawei have identified that an inverter can be so much more than a means of converting one form of energy to another. Discover digital turbo.

Featured inverter alternatives:

Sometimes your preferences extend beyond those featured above. Never fear! Perth Solar Warehouse stock the big brand inverter technologies to match your budget, preferences and future intents.

Above: Tap image to view product overview.

Your ideal system selection continued...

Alternatively, discover your perfect LONGi Solar panels infused solar power system in as little as 5 minutes with detailed annual yield insights and more. 

Understanding that LONGi solar panels, in general, are a high-quality solution for your solar project is a fantastic space to be. Taking advantage of the Perth Solar Warehouse range of amazing LONGi Solar deals will no doubt alleviate any chance of buyers remorse when making the next step to go solar.



Exclusive LONGi Solar PANELS Perth WA deals.
  • 3.3kW6.6kW & 10kW+ system options.
  • Your ideal LONGi solar panels.
  • Your preferred solar inverter technology, compare.
  • PSW project management portal.
  • PSW premium in-house installation (no sub-contractors).
  • PSW leading 15-year workmanship warranty.
  • PSW stocked compatible solar battery options, compare.
  • PSW Life Support, discover.
  • PSW Rewards Club Gold access.
  • PSW 5-star customer satisfaction as featured on Google and SolarQuotes.
  • PSW vs the rest, discover the difference.
  • $0 deposit payment plans available, discover.
Want more?

Compare the Perth Solar Warehouse LONGi Solar panels against the entire Perth Solar Warehouse product range for price, warranty, design and more within the latest Perth Solar Warehouse digital catalogue.

In a nutshell, we’ve lost count of how many variations we could do with our entire  LONGi Solar Panels Perth WA stock. Get in contact via the above link and you’ll be guaranteed the best price for your specific installation. It’s that simple.

Still unsure? You need to see this, PSW vs the rest >

Any other essential information on LONGi solar panels you think should be covered?  Be vocal, add a comment below, and the answer you seek won’t be far! – PSW Team.

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