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Longi Solar LR4-72HBD-440M
Longi Solar Brand review

LR4-72HBD-440M

440 Wp PERC Bifacial 70%
ComparePV verdict

Warranty pick, heavy for its output

Rank 11,142 of 14,005
Compare panels Datasheet PDF
Power (Wp)
440
Strong · top 15%
Efficiency (%)
20.20
Weak · bottom 19%
Density (Wp/m²)
202.4
Weak · bottom 21%
Temp (%/°C)
-0.340
Strong · top 24%
Weight (kg)
27.5
Weak · 5.5 kg above median
Warranty (yrs)
30
Strong · top 17%

Longi Solar Hi-MO 4 (LR4-72HBD 440~460M) modules combine bifacial construction with glass-glass lamination, enabling them to significantly increase energy yield, even when light reflects off the ground (such as light roofs, gravel, or membranes). The application of PERC monocrystalline cells in a half-cut configuration helps minimize losses due to partial shading and reduces the risk of hot spots, leading to more stable system performance under challenging conditions. A key advantage of this series is its resistance to LID and PID degradation, which is crucial for investors seeking reliable, long-term energy production. These modules are suitable for both commercial rooftop installations and large-scale PV farms, as well as tracker projects, where durability and long-term reliability are paramount. Against many competitive panels, they stand out through the practical combination of high glass-glass durability and the benefits of bifacial technology-without compromising daily operation.

Ranking

954 panels in the segment PERC 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 20.20% 20.60% Weak · bottom 19% 11,956
Power density 202.4 206.2 Weak · bottom 21% 11,857
Temperature coefficient -0.340 -0.350 Strong · top 24% 8,778
Weight per kWp 62.5 53.0 Weak · bottom 5% 12,777
Performance warranty 30 yrs 25 yrs Strong · top 17% 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

7 positive · 7 caution
Best for

Commercial and shaded-installations.

Not ideal for

Weight-limited structures, tight roof space and roofs where every square metre has to count.

Strengths
30 year performance warranty

Top 17% of the PERC 400-450 W segment, against a median of 25 yrs.

-0.340 %/°C temperature coefficient

Top 24% of the PERC 400-450 W segment, against a median of -0.350.

Watch-outs
62.5 kg per kWp

Bottom 5% of the PERC 400-450 W segment, against a median of 53.0. Ranked 12,777th in the whole database.

20.20% module efficiency

Bottom 19% of the PERC 400-450 W segment, against a median of 20.60%.

202.4 watts per square metre

Bottom 21% of the PERC 400-450 W segment, against a median of 206.2.

What owners get
Bifacial glass-glass construction

Glass-glass lamination combined with bifacial technology can recover up to an additional 25% of energy from the rear side under high-albedo surfaces (rooftop, gravel, membrane), while the construction itself supports a 30-year service life.

Half-cut PERC cells, low LID/PID

The half-cut monocrystalline PERC cell layout reduces losses under partial shading and hot-spot risk, while annual power degradation below 0.45% and resistance to LID and PID ensure predictable energy yield throughout the module's lifetime.

Tier-1 manufacturer per BNEF

LONGi Solar, operating since 2000, has consistently appeared on the BNEF Tier 1 list (confirmed as of Q1 2023), reflecting documented bankability and access to non-recourse bank financing - important for large commercial installations and utility-scale PV plants.

30-year linear power warranty

The manufacturer offers a 30-year linear power output warranty, exceeding the 25-year power warranties that were standard among most PERC-segment competitors at the time of this series' launch.

1500V system compatibility

A maximum system voltage of 1500V combined with a Pmax temperature coefficient of -0.35%/°C enables longer module strings and reduced BoS costs (wiring, inverters, mounting structures) - relevant for large-scale utility and tracker-based installations.

Trade-offs
Production discontinued (2023)

The Hi-MO 4 series was discontinued in 2023, meaning limited availability of replacement modules in case of failure and more difficult warranty claims over the remaining multi-year term - investors should plan for potential replacement with a different series in the event of repairs.

Efficiency below current TOPCon peers

Efficiency of 20.2-21.2% is notably lower than comparable, newer N-type TOPCon modules (e.g. Phono Solar Draco or SunKean SKT440-460M12-96D4 reaching up to 23.02%), meaning lower power output for the same roof area.

Fire rating limited to Class C

The datasheet lists only Class C fire rating per UL790, while some newer competing modules offer Class A - this can restrict use on pitched roofs near other buildings where local codes require a higher fire safety class.

Product warranty limited to 12 years

The standard product (materials and workmanship) warranty is only 12 years, whereas newer N-type module series on the market now offer 15-25 years of product warranty, reducing long-term investment security relative to current standards.

Notes from the database
  • At 20.2% efficiency, this panel is on par with typical PERC 400-450W modules
  • 202.4 W/m² power density is 3.8 W/m² below PERC 400-450W median (206.2 W/m²) - requires larger installation area
  • Temperature coefficient of -0.34%/°C matches the PERC 400-450W median
  • At 27.5 kg (5.5 kg above PERC 400-450W median of 22.0 kg), requires checking roof load capacity
  • Bifacial design (70% factor) captures reflected light - adds 4-10% yield on ground-mount or white roof

Specifications

Open datasheet PDF
Nominal power (Pmax) 440 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.20 % Weak Segment median 20.60%
Vmpp · Impp 41.00 V · 10.73 A Operating point at max power
Voc · Isc 49.20 V · 11.45 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2094×1038×35 mm · 2.17 m² of roof
Weight 27.5 kg Weak Weak · 5.5 kg above median
Cells 144 · PERC Monocrystalline
Bifaciality 70 % Rear output as a share of front
Coefficient Pmax -0.340 %/°C Strong top 24% of its segment
Coefficient Voc · Isc -0.265 · 0.050 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Strong top 17% · median 25 yrs
End-of-warranty output 85.0 % Equals 374 W guaranteed
Degradation 2.00 → 0.45 % First year, then annual

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.340 %/°C against a segment median of -0.350
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Longi Solar LR4-72HBD-440M 440 W 20.20% -0.340 27.5 kg You are here
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, lighter, +4.3 pp
STP-NT11/48QGSF-490 490 W 24.50% -0.260 21.5 kg Cooler, lighter, +4.3 pp
JAT54S40-485/LR 485 W 24.30% -0.260 19.3 kg Cooler, lighter, +4.1 pp
AIKO-A485-MCE54Mw 485 W 24.30% -0.260 21.0 kg Cooler, lighter, +4.1 pp
AIKO-A485-MAH54Mw 485 W 24.30% -0.260 21.5 kg Cooler, lighter, +4.1 pp
GK-5-54HG-485M 485 W 24.30% -0.260 21.0 kg Cooler, lighter, +4.1 pp
ZEUS 3.0+ 108 485WP 485 W 24.30% -0.260 24.2 kg +45 W, cooler, +4.1 pp
LR4-72HIH-445M 445 W 20.50% -0.340 24.3 kg Lighter, +0.3 pp, -5 yr warranty
LR4-72HIH-450M 450 W 20.70% -0.340 24.3 kg Lighter, +0.5 pp, -5 yr warranty
LR4-72HIH-455M 455 W 20.90% -0.340 24.3 kg Lighter, +0.7 pp, -5 yr warranty
GKA120N-PRO-590W 590 W 23.82% -0.300 26.7 kg +150 W, cooler, +3.6 pp
GKA120N-PRO-585W 585 W 23.62% -0.300 26.7 kg +145 W, cooler, +3.4 pp
BGO 580 580 W 23.50% -0.290 26.0 kg +140 W, cooler, +3.3 pp
GKA120N-PRO-580W 580 W 23.42% -0.300 26.7 kg +140 W, cooler, +3.2 pp

Found 234 panels of the same or similar size to this one, within ±10 mm. See them here Found 325 panels of the same or similar size to this one, within ±25 mm. See them here Found 352 panels of the same or similar size to this one, within ±50 mm. See them here Found 1158 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Is the LONGi Solar Hi-MO 4 LR4-72HBD 440~460M series still available for purchase?
The Hi-MO 4 (LR4-72HBD 440~460M) series has been discontinued by LONGi Solar and is no longer in active production. New units may still be found in limited quantities from distributors clearing warehouse stock. Buyers planning a new installation should consider current LONGi product lines such as Hi-MO 5 or Hi-MO 6, which deliver higher efficiency ratings and full manufacturer support.
What warranty does the LONGi Hi-MO 4 LR4-72HBD carry and what does it cover?
The Hi-MO 4 LR4-72HBD comes with a 12-year product warranty covering materials and workmanship, plus a 30-year linear power output warranty. After 30 years of operation, LONGi guarantees at least 84.95% of nameplate power. This extended linear warranty is particularly relevant when calculating LCOE for commercial rooftop systems and utility-scale PV farms.
How does bifacial technology work in the LONGi Hi-MO 4 LR4-72HBD and when does it make financial sense?
The bifacial Hi-MO 4 generates power from both the front and rear faces by capturing light reflected off the ground surface. Bifacial gain typically ranges from 5–15% depending on the albedo of the surface below. Maximum gains are achieved over light-colored gravel, white TPO membranes, or concrete, and in ground-mount installations with single-axis trackers. On dark or flush-mounted rooftops, the rear-side contribution is minimal.
How does the Hi-MO 4 LR4-72HBD 460M handle partial shading from chimneys or antennas?
The half-cut cell layout (144 cells split into two independent strings) limits the impact of partial shading to the affected section while the rest of the module continues producing at full capacity. Combined with LID and PID resistance, this stabilizes long-term output under real-world conditions. For persistent or heavy shading, adding DC optimizers or microinverters is still advisable to maximize system yield.
What are the dimensions and weight of the LONGi Hi-MO 4 LR4-72HBD — does it fit a standard racking system?
The module measures 2094 x 1038 x 30 mm and weighs approximately 27.5 kg. This is a 72-cell commercial-format panel, larger and heavier than typical 60-cell residential modules. Before installation, verify the load-bearing capacity of the roof structure and confirm that the racking rail spacing is compatible, as mounting hardware designed for smaller-format panels may not align correctly with this module.
Why does the LONGi Hi-MO 4 LR4-72HBD use glass-glass lamination and what are the real-world benefits?
Glass-glass construction replaces the standard rear backsheet with a second glass layer, significantly improving moisture resistance, chemical durability, and resistance to mechanical degradation over time. The module is rated for snow loads up to 5400 Pa and wind loads up to 2400 Pa, making it suitable for ground-mount farms, flat commercial rooftops, and agrivoltaic projects where long-term structural integrity under environmental stress is critical.
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