LONGi Hi-MO X6 Review 2026 (and Hi-MO X10): Specs, Price and Verdict

LONGi is one of the world’s largest solar manufacturers and a major panel brand in Australia. Its Hi-MO X6 range (part numbers starting LR5-54HTH or LR5-54HTB, sold as Explorer and Scientist versions) is a back-contact panel that has been a common sight on Australian quotes in recent years. In late 2025 LONGi launched its successor, the Hi-MO X10 (part numbers starting LR7-54), and X10 models make up most of LONGi’s newest residential approvals on the Clean Energy Council list, while recent SolarQuotes owner reviews increasingly name the X10 Explorer. If your quote is dated 2026, check which one you are being offered. Both are usually quoted to households wanting a premium look at a mid-range price, against AIKO, Jinko and Trina.

This review is based on manufacturer documentation, warranty terms, published pricing and owner and installer feedback; Solar Cobber did not test the product and was not paid by the manufacturer.

What it is and how it works

Most panels have thin silver lines (busbars and fingers) across the front of each cell to collect current. In a back-contact panel, all of that wiring moves to the rear of the cell. The front is a clean, uniform dark surface that catches more light, which is why back-contact panels look sleek and score well on efficiency. LONGi calls its version HPBC (hybrid passivated back contact).

The Hi-MO X6 uses 108 cells in a 1722 x 1134 mm panel rated about 420 W to 450 W, with LONGi’s datasheet showing 22.5% efficiency at 440 W. It uses a single sheet of 3.2 mm tempered glass with a backsheet, weighing 20.8 kg.

The Hi-MO X10 moves to HPBC 2.0 cells in a slightly longer 1800 x 1134 mm panel. LONGi’s datasheets cover 475 W to 505 W, with efficiency up to 24.74%, at 21.6 kg. In Australia LONGi markets X10 versions including Explorer, Scientist and a residential EcoLife model, plus lightweight and anti-dust Guardian versions aimed at commercial roofs.

Where it sits: SolarQuotes founder Finn Peacock sums LONGi up as “pretty cheap, pretty damn good”, calling the brand a safe bet with strong R&D and good Australian support.

Specs that matter in Australia

Heat performance. The X6 is rated -0.29%/°C and the X10 -0.26%/°C. On a hot roof with cells 40°C above the 25°C test temperature, that is roughly an 11.6% loss for the X6 versus 10.4% for the X10. For Queensland, WA and inland homes, the X10 is the better pick.

Shade. LONGi says the X10’s design limits extra power loss under partial shade and runs a shaded cell much cooler than a conventional panel, citing TÜV test reports on its datasheet. These are manufacturer claims from controlled tests; real-world benefit depends on how and where the shade falls. SolarQuotes notes that a LONGi installation manual stated panels “should not be shaded in any case”, which it was seeking clarification on, so do not treat any panel as a fix for a badly shaded roof.

Current and inverter matching. The X6 440 W has a short-circuit current of 14.30 A; the X10 runs from 15.03 A (475 W) to 15.62 A (505 W). Your inverter should accept at least 16 A per string input. Our guide to string inverters, microinverters and MPPTs explains why this matters.

Hail and wind. Both datasheets list the standard 25 mm hailstone test at 23 m/s and a 5400 Pa front, 2400 Pa rear static load. Energy Matters reports LONGi claims a Swiss VKF HW4 hail rating (40 mm ice balls) for the EcoLife X10, so ask for the certificate if hail is a concern where you live.

Coastal homes. SolarQuotes reports LONGi’s guidance requires installation more than 50 m from beaches, with anti-corrosion treatment recommended where sea mist is present. Check the current installation manual for your model.

Phase, export limits and VPPs. These are set by your inverter and network rules, not the panels.

Approval status. We confirmed on the Clean Energy Council approved module list hosted by the Clean Energy Regulator (updated 2 October 2026) that the Hi-MO X6 LR5-54HTH (440 W to 450 W) and LR5-54HTB (430 W to 445 W) are listed to August 2027. Hi-MO X10 models are listed as LR7-54HVH (475 W to 500 W, to April 2028) and LR7-54HVB, HVBB and HVD versions (to January 2029). Older LR5-54HTH listings under the previous test standard expired in March 2025, so check the exact model on your quote.

Price in Australia

We could not find a published Australian retail price index for LONGi panels specifically. Solar Choice’s October 2026 brand table lists comparable panels at A$0.25 to A$0.28 per watt for Jinko and A$0.31 per watt for AIKO’s back-contact Neostar, hardware only.

For whole systems, Solar Choice’s October 2026 index put a standard 6 kW system at A$6,330 on average (A$5,030 in Perth to A$6,950 in Hobart) and a premium 6 kW system at A$7,550 on average (A$6,150 in Perth to A$8,250 in Hobart). Darwin is higher in both tiers. Prices include GST and the STC discount. Expect a LONGi quote to land somewhere in that A$5,000 to A$8,300 band, depending largely on whether the installer pairs the panels with a budget or premium inverter.

STCs reduce the price at the point of sale and the discount steps down every January until 2030; our STC rebate explainer covers the maths.

Warranty: the fine print

LONGi’s warranty terms are the part of this review that most needs checking against your own paperwork, because LONGi publishes different numbers in different places.

• Hi-MO X6. LONGi’s Australian product page for the X6 Explorer shows a 25 year product warranty and 25 year power warranty. The global datasheet shows 15 years for materials and processing, so the Australian term is an upgrade that should appear on your warranty certificate. The power warranty allows up to 1.5% loss in year one and 0.40% a year after, leaving 88.9% at year 25.
• Hi-MO X10. LONGi’s datasheets show a 30 year power warranty (1% in year one, 0.35% a year after, 88.85% at year 30). The global datasheets show a 15 year product warranty, while Australian launch coverage reports 25 years for the residential X10. Ask your installer for LONGi’s Australian warranty certificate naming your exact part number.
• Labour. We found no LONGi document promising to pay for removal and reinstallation labour in Australia. Assume your installer’s workmanship warranty and Australian Consumer Law are what cover labour.
• Local support. LONGi has an Australian team (general enquiries 02 8484 5805), and SolarQuotes rates its local support well.

History helps here: in 2023 LONGi lifted the product warranty on its earlier Hi-MO 5m 54-cell panels from 15 to 25 years for Australia and New Zealand, so a longer Australian term than the global sheet is consistent with past practice. It still needs to be on paper.

What owners and installers report

Praise. LONGi holds a 5.0 out of 5 rating on SolarQuotes from more than 4,300 owner ratings. Owners repeatedly mention strong generation, the look of all-black panels, and panels surviving hail storms. LONGi is also on Kiwa PVEL’s 2026 Top Performer manufacturer list, though those results apply to specific tested designs.

Complaints and cautions. Finn Peacock’s verdict on SolarQuotes is that LONGi’s performance is “nothing to get excited about” but as good as any other good budget brand, which is a fair summary of the X6 now that the X10 and AIKO’s Neostar outperform it. The shading wording in LONGi’s installation manual and the coastal guidance are the recurring technical caveats raised on SolarQuotes. We found few documented warranty claim disputes involving LONGi in Australia, but the X10 has been on Australian roofs only since late 2025.

Size creep. The X10 is 78 mm longer than the X6. On a tight roof, that can mean one fewer panel per row, so the higher wattage does not always translate into a bigger system.

LONGi Hi-MO X6 vs alternatives

Choose the Hi-MO X10 over the X6 unless the X6 is heavily discounted. Choose AIKO’s Neostar if you want the highest efficiency in the standard 1762 x 1134 mm size and a clearly published 25 year Australian product warranty. Choose Jinko or Trina TOPCon panels if price per watt matters most and your roof is unshaded.

Questions to ask your installer

• Is this a Hi-MO X6 or Hi-MO X10, and what is the full part number?
• Can you show me LONGi’s Australian warranty certificate stating the product warranty years for this model?
• Is this exact model and wattage on the current CEC approved list?
• Does my inverter accept the panel’s short-circuit current (about 15.6 A for a 505 W X10)?
• Will the 1800 mm X10 fit as many panels on my roof as a 1722 mm or 1762 mm panel?
• How far is my roof from the beach, and does LONGi’s installation manual allow it?
• Is any shading on my roof within what LONGi’s manual permits?
• Who pays labour if a panel must be replaced in year 12?

FAQ

What is the difference between the LONGi Hi-MO X6 and Hi-MO X10?

The X10 uses LONGi’s second-generation back-contact cells, produces 475 W to 505 W versus about 420 W to 450 W, has a better -0.26%/°C heat rating and comes with a 30 year power warranty instead of 25 years.

Is the LONGi Hi-MO X6 still worth buying?

Only at a clear discount. It is a reliable panel, but the X10 and similar back-contact rivals deliver noticeably more power from a similar footprint.

What warranty does LONGi offer in Australia?

LONGi’s Australian page shows 25 years product and 25 years power for the X6 Explorer. The X10 carries a 30 year power warranty, and Australian launch coverage reports a 25 year product warranty. Global datasheets show 15 years, so get the Australian certificate.

Do LONGi back-contact panels handle shade better?

LONGi claims the X10 loses less power and runs cooler when partly shaded, based on TÜV tests. Real-world benefit varies, and no panel removes the need for good array design on a shaded roof.

Are LONGi panels heavy?

No. Both use single glass: 20.8 kg for the X6 and 21.6 kg for the X10, versus 24.4 kg for Jinko’s dual-glass Tiger Neo 3.0.

Where are LONGi panels made?

LONGi is headquartered in Xi’an, China. Check the country of origin on the label or datasheet for your specific batch.

Find an installer

The right installer will tell you which LONGi model is actually in stock and back it with a written warranty. Use our guide to comparing solar quotes, then search our installer directory for CEC-accredited installers who quote LONGi and can show you the Australian warranty certificate before you sign.