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Longi Solar Brand review

LR7-54HTHF-475M

475 Wp N-type
ComparePV verdict

Light for its output, short guarantee

Rank 7,549 of 14,129
Compare panels Datasheet PDF
Power (Wp)
475
Typical for its class
Efficiency (%)
23.30
Strong · top 15%
Density (Wp/m²)
232.7
Strong · top 20%
Temp (%/°C)
-0.280
Strong · top 21%
Weight (kg)
21.6
Strong · 2.1 kg below median
Warranty (yrs)
25
Weak · bottom 7%

The Longi Solar Hi-MO X6 Guardian (Anti-Dust) LR7-54HTHF 455~475M was designed with one of the most common problems in PV installations in mind - yield losses caused by dust, dirt, and grime accumulating at the bottom edge of the modules. The key innovation is the Anti-Dust frame construction, which employs a design that slopes one of the edges, allowing dirt to slide off more easily due to gravity and rain. In practice, this results in less shading from dirt, more stable performance, and less frequent cleaning, lowering operational costs.

This series utilizes a highly efficient back-contact cell architecture, valued for its superior light utilization and aesthetically pleasing, uniform appearance from the front side - particularly desired on residential rooftops. Furthermore, the module emphasizes enhanced structural reliability thanks to its patented frame and refined sealing, aiding performance in windy conditions, heavy rain, and temperature cycles.

This solution is for investors looking to maximize energy production in dusty environments (such as roadsides, fields, industrial zones) - both for residential and commercial installations.

Ranking

302 panels in the segment N-type 450-500 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.30% 22.52% Strong · top 15% 1,057
Power density 232.7 225.3 Strong · top 20% 1,231
Temperature coefficient -0.280 -0.290 Strong · top 21% 1,347
Weight per kWp 45.5 49.7 Strong · top 14% 743
Performance warranty 25 yrs 30 yrs Weak · bottom 7% 9,912
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

8 positive · 3 caution
Best for

Residential, commercial, hot-climate and shaded-installations.

Not ideal for

Owners who want a long output guarantee.

Strengths
45.5 kg per kWp

Top 14% of the N-type 450-500 W segment, against a median of 49.7.

23.30% module efficiency

Top 15% of the N-type 450-500 W segment, against a median of 22.52%.

232.7 watts per square metre

Top 20% of the N-type 450-500 W segment, against a median of 225.3.

Watch-outs
25 year performance warranty

Bottom 7% of the N-type 450-500 W segment, against a median of 30 yrs. Ranked 9,912th in the whole database.

What owners get
Patented Anti-Dust frame

A shortened frame edge lets dust and soiling slide off under gravity and rainfall, reducing bottom-edge shading and lowering the need for cleaning. This is a real advantage in dusty locations - roadside sites, agricultural land, or industrial zones.

Back contact (HPBC) cell architecture

The HPBC (Hybrid Passivated Back Contact) technology eliminates visible busbars on the front side, giving a uniform, aesthetic look favored on residential rooftops, while also reducing front-side optical losses typical of conventional PERC cells.

Low temperature coefficient of -0.28%/°C

At -0.28%/°C, this is clearly better than the -0.35 to -0.40%/°C typical of older PERC modules, translating into smaller power losses on hot days and higher real-world annual yield during summer conditions.

Bankable Tier-1 manufacturer

Longi Solar has operated since 2000 and is classified as a Tier-1, BNEF-bankable manufacturer, which eases project financing and provides confidence in long-term warranty support. The series launched in 2024, representing the current generation of N-type technology.

N-type technology - lower degradation

N-type cells exhibit near-zero LID (Light Induced Degradation) compared to older P-type PERC cells, resulting in more stable energy production during the first years of operation.

Trade-offs
Efficiency trails top peers

Peak efficiency of 23.3% is about 0.5 pp lower than direct competitors in the same 475W power class - JA Solar JAM54D40 LB and Astronergy ASTRO N7s 2.0 both offer 23.8%. For the same roof area, this means a slightly lower potential yield.

Shorter warranty than Longi's flagship series

The 15-year product warranty and 25-year power warranty are noticeably shorter than the standard offered by other, newer Longi Hi-MO X6 series (e.g. X6 Max, X6 Artist), which provide 25 years of product warranty and 30 years of power warranty. For buyers prioritizing the longest protection periods, this may be a limiting factor.

Notes from the database
  • 23.3% module efficiency - 0.8pp better than the N-type 450-500W median of 22.5%
  • Power density of 232.7 W/m² packs 7.4 W/m² more into the same footprint vs N-type 450-500W median (225.3 W/m²)
  • Temperature coefficient of -0.28%/°C matches the N-type 450-500W median
  • 21.6 kg weight - 2.1 kg lighter than N-type 450-500W median (23.7 kg), reducing installation effort
  • #1057 for efficiency, #1347 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 475 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.30 % Strong Segment median 22.52%
Vmpp · Impp 33.79 V · 14.06 A Operating point at max power
Voc · Isc 39.95 V · 15.07 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1800×1134×30 mm · 2.04 m² of roof
Weight 21.6 kg Strong Strong · 2.1 kg below median
Cells 108 · N-type Monocrystalline
Coefficient Pmax -0.280 %/°C Strong top 21% of its segment
Coefficient Voc · Isc -0.230 · 0.050 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 25 years Weak bottom 7% · median 30 yrs
End-of-warranty output 89.4 % Equals 415 W guaranteed
Degradation 1.00 → 0.40 % 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
-

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

Heat losses
-0.280 %/°C against a segment median of -0.290
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Longi Solar LR7-54HTHF-475M 475 W 23.30% -0.280 21.6 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, +1.7 pp, +5 yr warranty
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg Cooler, +1.5 pp, +5 yr warranty
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg Cooler, +1.4 pp, +5 yr warranty
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg Heavier, +1.4 pp, +5 yr warranty
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg Cooler, +1.2 pp, +5 yr warranty
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg Cooler, +1.2 pp, +5 yr warranty
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +25 W, +1.2 pp, +5 yr warranty
LR7-54HGBB-440M 440 W 21.60% -0.280 23.6 kg -35 W, -1.7 pp, +5 yr warranty
LR7-54HGBB-445M 445 W 21.80% -0.280 23.6 kg -30 W, -1.5 pp, +5 yr warranty
LR7-54HGBB-450M 450 W 22.00% -0.280 23.6 kg -25 W, -1.3 pp, +5 yr warranty
LR7-54HTH-455M 455 W 22.30% -0.280 21.6 kg -20 W, -1.0 pp
LR7-54HTH-460M 460 W 22.50% -0.280 21.6 kg -15 W, -0.8 pp
LR7-54HTH-465M 465 W 22.80% -0.280 21.6 kg -10 W, -0.5 pp

Found 213 panels of the same or similar size to this one, within ±10 mm. See them here Found 217 panels of the same or similar size to this one, within ±25 mm. See them here Found 1735 panels of the same or similar size to this one, within ±50 mm. See them here Found 4051 panels of the same or similar size to this one, within ±100 mm. See them here

About the Hi-MO X6 Guardian (Anti-Dust) LR7-54HTHF 455~475M series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

How does the Anti-Dust frame on the LONGi Hi-MO X6 Guardian LR7-54HTHF differ from a standard aluminum frame?
The Anti-Dust frame features a shortened lower edge aligned flush with the glass surface, eliminating the conventional frame ledge where dirt and mud accumulate. On a standard module that ledge creates a shadow that reduces output from the bottom cell row. Dust and mud instead slide off under gravity and rainfall. LONGi validated the design with over 500 days of field testing and 120+ patents covering the Guardian frame architecture.
What warranty does the LONGi Hi-MO X6 Guardian LR7-54HTHF 475W come with?
LONGi provides a 15-year product warranty covering material and workmanship defects, plus a 25-year linear power output warranty guaranteeing at least 87.4% of nominal power after 25 years. LONGi is a Tier 1 manufacturer with strong financial backing, which matters when filing warranty claims over a multi-decade system lifetime.
What is HPBC cell technology used in the Hi-MO X6 Guardian series and is it worth the premium?
HPBC (Hybrid Passivated Back Contact) is LONGi's proprietary N-type back contact architecture that moves all metal electrodes to the rear of the cell, leaving the front surface free for maximum light absorption. This pushes module efficiency up to 23.3% and delivers a clean, uniform aesthetic preferred in residential rooftop installations. The higher efficiency also means more power output per square meter of available roof space.
Are the LONGi Hi-MO X6 Guardian 455-475M panels suitable for dusty sites such as roadsides or agricultural land?
Yes - the Hi-MO X6 Guardian Anti-Dust series was specifically engineered for high-soiling environments. The shortened frame edge removes the dust trap present on conventional frames, allowing rainfall to self-clean the module without service intervention. This is particularly valuable on roadside solar farms, industrial zones, and farmland where soiling losses can reduce annual yield by several percent compared to standard modules.
What is the actual peak power of the LONGi Hi-MO X6 Guardian LR7-54HTHF and how should I read the 455-475M designation?
475 Wp is the peak power measured under Standard Test Conditions (STC: 1000 W/m² irradiance, 25 °C cell temperature, AM 1.5 spectrum). The 455-475M designation indicates binned output classes; each shipped module includes a flash test report confirming its measured wattage. For system sizing, using the lower bound of the range is the conservative approach.
Is the LONGi Hi-MO X6 Guardian LR7-54HTHF a bifacial module and can it be used with single-axis trackers?
No, the LR7-54HTHF Anti-Dust variant is a monofacial module - it does not feature bifacial cell technology. It is compatible with fixed-tilt roof and ground-mount structures as well as single-axis trackers, but no additional rear-side energy gain from ground albedo is available. If bifacial performance is a priority, consider other LONGi series with a B suffix in the model designation.
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