Sunbridge brand guide

LONGi

High-efficiency solar modules,for long-term performance.

Sunbridge reviews LONGi's solar module technology, product positioning and rooftop suitability to help Australian homeowners understand where it may fit within a broader solar and storage plan.

Reviewed for Australian homes
Explore LONGi panels
Solar PanelsBrand / 08 of 15

At a glance

  • Up to 24.8% module efficiency
  • Low first-year degradation
  • Back-contact (BC) cell technology
High efficiencyMono-crystallineHalf-cut cellsLow degradation

About LONGi

High-efficiency solar modules built for long-term output

LONGi brings high-efficiency mono-crystalline cell technology and low-degradation module design together for reliable long-term solar generation.

LONGi develops high-efficiency mono-crystalline solar modules with half-cut cell technology. Its panels are designed to maximise output per square metre and maintain performance over long operating lifetimes.

  • High module efficiency

    High-efficiency mono-crystalline cells are designed to maximise output from limited roof space.

  • Half-cut cell design

    Half-cut cell construction helps reduce resistive losses and improve shade tolerance.

  • Low long-term degradation

    Modules are designed to retain a high share of their rated output over decades of operation.

High efficiencyMono-crystallineHalf-cut cellsLow degradation

In Sunbridge’s eyes

Record-lab efficiency at a mainstream price

LONGi built the modern solar industry from the wafer up — founded in Xi’an in 2000, it grew into the world’s largest maker of monocrystalline silicon wafers and the R&D house that keeps breaking the silicon cell-efficiency world record, hitting 27.81% in 2025. In Australia it’s a Tier 1 mainstay with a local warranty office and a long run of PVEL “Top Performer” results.

  • The world’s largest monocrystalline wafer maker — the cell science is LONGi’s own, not bought in.
  • A serial efficiency record holder (27.81% silicon, 2025), and that R&D flows into its Hi-MO X10 back-contact panels.
  • Back-contact design lifts efficiency per m² and handles partial shade better — good on tight or shaded roofs.
  • Tier 1 and an eight-time PVEL Top Performer, with an AU office that honours claims even if your installer disappears.
Best suited to

homeowners wanting proven high-efficiency, back-contact panels at a mainstream price rather than the longest-headline performance warranty.

Available products

LONGi panels available through Sunbridge

Explore panels available through Sunbridge, with guidance based on your roof space, energy use, existing system and future expansion plans.

LONGi · Solar Panels

LONGi LR7-72HVHF

LONGi Hi-MO X10 Guardian LR7-72HVHF — High-efficiency back-contact module

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LONGi LR7-72HVHF product image
  • 640–670 WPanel output
  • Up to 24.8%Module efficiency
  • BC-cellBack-contact tech

LONGi LR7-72HVHF · with Sunbridge

The right fit for your home — and fully backed

Why the LR7-72HVHF fits your home

Larger rooftops and higher yield

A high-power module designed for larger rooftops, delivering lower LCOE and higher energy yield from the available area.

Cooler, more efficient operation

Back-contact (BC) cell technology enables lower operating temperature and higher power output.

Decades of dependable output

First-year degradation under 1% and just 0.35%/year afterwards, backed by a 30-year power warranty.

All-black street appeal

Back-contact cells have no front busbars, giving a clean all-black module that looks tidy on the roof.

Designed, installed & backed by Sunbridge

Up to 24.8%Module efficiency (STC)
30-yearPower warranty (≥ 88.85%)
ACLAustralian Consumer Law protected
Warranty & compliance
  • LONGi backs the Hi-MO X10 Guardian (LR7-72HVHF) with a 30-year power (performance) warranty, guaranteeing at least 88.85% of rated power at year 30 — after first-year degradation of under 1% and just 0.35% per year thereafter.
  • A separate manufacturer product (materials and workmanship) warranty covers the module hardware; Sunbridge confirms the current term for your batch and registers the warranty on your behalf.
  • These are the manufacturer’s terms; your guarantees under the Australian Consumer Law apply in addition.
Rebates & payback guidance
  • Rooftop solar is supported by the federal Small-scale Renewable Energy Scheme, which creates Small-scale Technology Certificates (STCs) that reduce the upfront cost of an eligible system. Their value depends on your system size, location and the year of installation.
  • Sunbridge factors available STC incentives into your quote and shows the expected payback based on your actual usage. We confirm exactly what applies to your address when we prepare your quote.

The detail

Full technical specifications

Module

Cell technology
HPBC back-contact (BC) mono-crystalline
Number of cells
144 (6 × 24)
Dimensions
2382 × 1134 × 30 mm
Weight
28.5 kg
Glass
Single glass, 3.2 mm coated tempered glass
Frame
Anodized aluminium alloy
Junction box
IP68, three diodes

Electrical performance (STC)

Rated power (Pmax)
640 – 670 W
Module efficiency
23.7 – 24.8 %
Open-circuit voltage (Voc)
53.70 – 54.30 V
Short-circuit current (Isc)
15.13 – 15.61 A
Max. power voltage (Vmp)
44.36 – 44.96 V
Max. power current (Imp)
14.43 – 14.91 A
Power tolerance
0 / +3 %

Temperature & operating

Temp. coefficient of Pmax
−0.260 %/°C
Temp. coefficient of Voc
−0.200 %/°C
Temp. coefficient of Isc
+0.050 %/°C
Operating temperature
−40 °C to +85 °C
NOCT
45 ± 2 °C
Max. system voltage
1500 VDC (IEC)
Max. series fuse rating
25 A

Mechanical load & safety

Front-side max. static load
5400 Pa
Rear-side max. static load
2400 Pa
Hailstone test
25 mm at 23 m/s
Protection class
Class II
Fire rating
IEC Class C

Specifications are based on the LONGi Hi-MO X10 Guardian LR7-72HVHF datasheet (20240927 V01 draft). Some electrical values vary by power bin; Sunbridge confirms the exact module and final specifications for your system.

  • System assessment
  • Product guidance
  • Installation coordination
  • After-sales support

Is LONGi right for your roof?

Sunbridge considers your roof space, orientation, shading, energy use and future storage plans before recommending panels or a system size.

  • 01

    Roofs where efficiency matters

    High-efficiency modules maximise output per square metre.

  • 02

    Homes with partial shading

    Half-cut cell design helps limit shading losses.

  • 03

    Owners focused on long-term yield

    Low degradation supports decades of generation.

  • 04

    Larger residential arrays

    Efficient modules suit higher-output system designs.

Sunbridge advisor insight

Final suitability depends on your roof space, orientation, shading, existing system and future storage plans.

FAQ

Frequently asked questions

It is a high-power back-contact (BC) solar module rated from 640 W to 670 W, reaching up to 24.8% module efficiency. It is part of LONGi’s Hi-MO X10 Guardian series, built on the HPBC back-contact cell platform.

Guide · 7 min readSolar Panel FAQ: wattage, N-type, efficiency & how many you needWhat the panel numbers mean, what N-type and back-contact cells change, and how panels pair with a battery.

Explore more

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Not sure LONGi is the right fit? Compare the other Solar Panels brands Sunbridge supplies and installs — same team, same warranty-backed install.

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