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Longi Solar LR5-54HPH-425M
Longi Solar Brand review

LR5-54HPH-425M

425 Wp PERC
ComparePV verdict

Efficiency leader, no clear weak spot

Rank 10,867 of 14,005
Compare panels Datasheet PDF
Power (Wp)
425
Typical for its class
Efficiency (%)
21.80
Strong · top 1%
Density (Wp/m²)
217.6
Strong · top 1%
Temp (%/°C)
-0.340
Strong · top 24%
Weight (kg)
20.8
Strong · 1.2 kg below median
Warranty (yrs)
25
Typical · median 25 yrs

The Longi Solar Hi-MO 5m (G2) series was designed with rooftop installations in mind, where high energy yield, aesthetics, and hassle-free installation are equally important. These modules are based on monocrystalline PERC solar cells doped with gallium, effectively reducing light-induced degradation (LID) and helping maintain stable performance over the long term. In practice, this means less disappointment in subsequent seasons and more predictable savings.

What stands out in this series is Smart Soldering - segmented soldering tapes, which better manages stresses in the cells and improves reliability during daily temperature fluctuations. Additionally, optimized electrical parameters simplify equipment selection-modules work well with popular inverters and MLPE devices (e.g., optimizers, string inverters).

The Hi-MO 5m (G2) is a good choice for homes, micro-installations, and smaller C&I roofs, especially when a compact format and aesthetic appearance (including all-black variants) are important, while simultaneously expecting high performance in weaker morning, evening, and less-than-ideal light incidence angles.

Ranking

954 panels in the segment PERC 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.80% 20.60% Strong · top 1% 7,022
Power density 217.6 206.2 Strong · top 1% 7,172
Temperature coefficient -0.340 -0.350 Strong · top 24% 8,778
Weight per kWp 48.9 53.0 Strong · top 10% 2,624
Performance warranty 25 yrs 25 yrs Typical 9,798
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

8 positive · 3 caution
Best for

Residential, commercial and shaded-installations.

Strengths
21.80% module efficiency

Top 1% of the PERC 400-450 W segment, against a median of 20.60%. Ranked 7,022nd in the whole database.

217.6 watts per square metre

Top 1% of the PERC 400-450 W segment, against a median of 206.2. Ranked 7,172nd in the whole database.

48.9 kg per kWp

Top 10% of the PERC 400-450 W segment, against a median of 53.0.

What owners get
Low power degradation via gallium doping

Gallium-doped PERC cells limit LID to below 1.5% in the first year, with only 0.4% annual degradation thereafter, translating to roughly 88% of nominal power retained after 25 years of operation.

Tier-1 manufacturer with 25 years of track record

Longi Solar has operated since 2000 and is classified as bankable Tier-1, easing project financing and increasing confidence in long-term warranty support compared to less established brands.

Efficiency matching segment leaders in PERC

Maximum efficiency of 21.9% ties the top comparable module, JA Solar DeepBlue 3.0 Pro (21.9%), and exceeds Vikram Solar PREXOS and Paradea (21.87%), despite relying on proven PERC rather than pricier N-type cells.

Segmented ribbons via Smart Soldering

Smart Soldering technology reduces mechanical stress on cells during thermal cycling, lowering the risk of microcracks and power loss over the module's operating life — relevant in climates with large seasonal temperature swings.

Wide power range and aesthetic all-black variants

12 variants spanning 405-565 Wp, plus available all-black versions, allow the module to fit both small pitched residential roofs and larger C&I installations without aesthetic compromise.

Trade-offs
Efficiency capped by PERC technology

PERC-based modules top out at 21.9% efficiency, while Longi's newer generation (Hi-MO X10, HPBC 2.0) already reaches 23-24%+, and competing N-type TOPCon panels offer a better temperature coefficient and lower long-term degradation.

25-year power warranty shorter than some peers

The linear power warranty runs 25 years with a 12-year product warranty, whereas JA Solar DeepBlue 3.0 Pro offers up to 30 years of power warranty under the same 12-year product warranty term, making Longi's offer less competitive on long-term investment security.

No bifacial variant available

The series is offered only in monofacial form, ruling out the additional energy gain (typically 5-10%) that bifacial panels — available from some competitors in this power segment — deliver on ground-mount or high-albedo roof installations.

Notes from the database
  • 21.8% module efficiency - 1.2pp better than the PERC 400-450W median of 20.6%
  • Power density of 217.6 W/m² packs 11.4 W/m² more into the same footprint vs PERC 400-450W median (206.2 W/m²)
  • At -0.34%/°C, hot weather performance is typical for PERC 400-450W panels
  • At 20.8 kg, this panel is 1.2 kg lighter than PERC 400-450W median (22.0 kg) - easier handling during installation
  • In the top 50% for efficiency among all PERC panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 425 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.80 % Strong Segment median 20.60%
Vmpp · Impp 31.94 V · 13.31 A Operating point at max power
Voc · Isc 37.96 V · 14.08 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1134×30 mm · 1.95 m² of roof
Weight 20.8 kg Strong Strong · 1.2 kg below median
Cells 108 · PERC Monocrystalline
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 25 years Typical median 25 yrs · median 25 yrs
End-of-warranty output 84.8 % Equals 349 W guaranteed
Degradation 2.00 → 0.55 % 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
-0.340 %/°C against a segment median of -0.350
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Longi Solar LR5-54HPH-425M 425 W 21.80% -0.340 20.8 kg You are here
SPR-MAX7-475 475 W 24.00% -0.270 21.1 kg Cooler, +2.2 pp, +15 yr warranty
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg Cooler, +2.0 pp, +5 yr warranty
JAT54S40-475/LR 475 W 23.80% -0.260 19.3 kg +50 W, cooler, +2.0 pp
TWMNH-48HW475 475 W 23.80% -0.280 23.7 kg +50 W, cooler, +2.0 pp
CHSM48RN(DG)/F-BH-475 475 W 23.80% -0.290 24.5 kg +50 W, cooler, +2.0 pp
AIKO-A475-MCE54Mw 475 W 23.80% -0.260 21.0 kg +50 W, cooler, +2.0 pp
AIKO-A475-MAH54Mw 475 W 23.80% -0.260 21.5 kg +50 W, cooler, +2.0 pp
LR5-54HIB-390M 390 W 20.00% -0.340 21.5 kg -35 W, -1.8 pp
LR5-54HIB-395M 395 W 20.20% -0.340 21.5 kg -30 W, -1.6 pp
LR5-54HPB-400M 400 W 20.50% -0.340 20.8 kg -25 W, -1.3 pp
LR5-54HPH-405M 405 W 20.70% -0.340 20.8 kg -20 W, -1.1 pp
LR5-54HPH-410M 410 W 21.00% -0.340 20.8 kg -15 W, -0.8 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +85 W, cooler, +3.2 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +70 W, cooler, +3.0 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +80 W, cooler, +2.9 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +65 W, cooler, +2.7 pp

Found 1783 panels of the same or similar size to this one, within ±10 mm. See them here Found 1914 panels of the same or similar size to this one, within ±25 mm. See them here Found 3392 panels of the same or similar size to this one, within ±50 mm. See them here Found 3970 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
What is the warranty on Longi Solar Hi-MO 5m (G2) panels?
Longi Solar provides a 12-year product warranty and a 25-year linear power output warranty for the Hi-MO 5m (G2) series. The power warranty guarantees that the panels retain a specified percentage of their rated output over the full 25-year period — a standard offering from a Tier 1 manufacturer of this caliber. Keep all warranty documents together with the installer invoice.
Are Longi Hi-MO 5m (G2) panels suitable for a pitched residential roof?
Yes, the Hi-MO 5m (G2) series was designed with rooftop installations in mind. The compact module format simplifies mounting on standard racking systems, and the all-black variant blends seamlessly with dark roof tiles. The 144 half-cut cell layout improves shading tolerance, which matters on roofs with chimneys, dormers, or other obstructions that cause partial shading.
What is Smart Soldering technology in the Hi-MO 5m (G2) and why does it matter?
Smart Soldering refers to the segmented soldering ribbons used in the Hi-MO 5m (G2) series. They distribute mechanical stress that builds up during daily thermal cycling — the module heating up and cooling down. This reduces the risk of microcracks in the cells, resulting in higher long-term reliability, especially in climates with wide temperature swings between seasons.
What is the maximum power of the Longi Hi-MO 5m (G2) and is an all-black version available?
The top power rating in the Hi-MO 5m (G2) series is 565 Wp. The series also includes all-black variants with a black frame and black backsheet, significantly improving the visual appearance of installations on dark roof coverings. Check with your local distributor for current availability of specific color variants, as lead times may differ.
Why are Hi-MO 5m (G2) cells gallium-doped and how does it affect long-term degradation?
Gallium doping in the PERC cells of the Hi-MO 5m (G2) series effectively suppresses LID (Light-Induced Degradation), a phenomenon that causes power loss in conventional boron-doped cells within the first weeks of operation. In practice, the panel stabilizes at its rated output faster and loses less energy over its entire service life, improving the overall LCOE of the installation.
Are Longi Hi-MO 5m (G2) panels compatible with power optimizers and microinverters?
Yes, the optimized electrical parameters of the Hi-MO 5m (G2) series make it straightforward to pair with MLPE devices such as power optimizers and microinverters from major manufacturers. The modules also work well with standard string inverters. Before purchasing, verify that your chosen inverter's MPPT voltage range matches the specifications listed in the datasheet for your specific wattage variant.
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