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Longi Solar Brand review

LR5-72HTH-600M

600 Wp Monocrystalline
ComparePV verdict

Light for its output, short guarantee

Rank 3,308 of 14,129
Compare panels Datasheet PDF
Power (Wp)
600
Typical for its class
Efficiency (%)
23.20
Strong · top 13%
Density (Wp/m²)
232.3
Strong · top 13%
Temp (%/°C)
-0.290
Typical · median -0.300
Weight (kg)
27.2
Strong · 4.3 kg below median
Warranty (yrs)
25
Weak · bottom 11%

The Longi Solar Hi-MO X6 Scientist LR5-72HTH 590-600M series was designed to maximize energy yield from every square meter, particularly in high-power density and fast installation scenarios. The key advantage is the application of HPBC+ (back-contact) cell technology, which creates a more optically "clean" module front side while collecting current more efficiently. This translates to better performance under dispersed light and more stable parameters in real-world conditions.

In practice, these modules help reduce the required installation surface area, thereby lowering BOS construction and equipment costs. Additionally, the series prioritizes high resilience and reliability in challenging conditions - ideal for industrial rooftops, utility-scale farms, and high-temperature locations. Versions with reinforced structures and solutions enhancing durability support longer, predictable operation.

This is an excellent choice for investors seeking high efficiency at elevated temperatures, for EPCs looking for project optimization, and for Commercial & Industrial (C&I) installations where maximizing yield from limited space is crucial. Compared to many standard PERC modules, the Hi-MO X6 Scientist stands out with its modern cell architecture and focus on field performance, not just catalog data.

Ranking

6,209 panels in the 500-700 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 23.20% 22.26% Strong · top 13% 1,349
Power density 232.3 222.6 Strong · top 13% 1,295
Temperature coefficient -0.290 -0.300 Typical 2,220
Weight per kWp 45.3 52.8 Strong · top 5% 693
Performance warranty 25 yrs 30 yrs Weak · bottom 11% 9,912
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

7 positive · 3 caution
Best for

Commercial, utility-scale and hot-climate.

Not ideal for

Owners who want a long output guarantee.

Strengths
45.3 kg per kWp

Top 5% of the 500-700 W band, against a median of 52.8. Ranked 693rd in the whole database.

232.3 watts per square metre

Top 13% of the 500-700 W band, against a median of 222.6.

23.20% module efficiency

Top 13% of the 500-700 W band, against a median of 22.26%.

Watch-outs
25 year performance warranty

Bottom 11% of the 500-700 W band, against a median of 30 yrs.

What owners get
HPBC+ back-contact cell technology

Moving contacts to the cell's rear eliminates front-side metallization shading, and combined with a multi-layer anti-reflection coating this improves short-circuit current by ~2.25% and cuts reflection of diffuse light by ~12%. The soft-breakdown feature reduces partial-shading power losses by up to 70% versus comparable TOPCon modules.

Low power temperature coefficient

The Pmax temperature coefficient is -0.29%/°C (per ENF/datasheet), better than typical TOPCon modules (around -0.30% to -0.34%/°C). In high-roof-temperature climates (industrial rooftops, PV farms) this translates into higher real-world energy yield than STC efficiency alone would suggest.

High power density, smaller footprint

Efficiency up to 23.2% and power up to 600 Wp reduce the number of modules needed for a given installed capacity, lowering mounting structure, cabling, and other BoS costs - a key advantage for C&I projects with limited roof area.

Low degradation and stable supply

The module shows about 1% first-year degradation and roughly 0.35% linear annual degradation thereafter, backed by a 98.5% power guarantee at year 1 and 88.9% at year 25. LONGi Solar is a Tier-1, bankable manufacturer founded in 2000, and this series, launched in 2022, remains in active production, ensuring service and parts availability.

Trade-offs
No bifacial version available

Unlike comparable N-type series with similar or higher efficiency - Powitt M10 (23.23%, dual-glass bifacial) or Tongwei TWMND 72HD (23.2%, bifacial) - the Hi-MO X6 Scientist LR5-72HTH is monofacial only. This stems from the HPBC design (rear-side contacts) but means no additional albedo-driven yield typical for ground-mount installations and high-reflectivity roofs (potentially 5-10% extra energy).

Power warranty shorter than leading N-type peers

The standard 15-year product warranty and 25-year power warranty (88.9%) are typical for the segment but trail the latest flagship N-type modules from competitors, e.g. Jinko Tiger Neo's 30-year linear power warranty. For investors modeling LCOE over a 30-year horizon, this can mean less favorable degradation assumptions after year 25.

Notes from the database
  • Efficiency of 23.2% is 1.4pp above the database median (21.8%)
  • Power density of 232.3 W/m² packs 14.2 W/m² more into the same footprint vs database median (218.1 W/m²)
  • Temperature coefficient of -0.29%/°C matches the database median
  • #1349 for efficiency, #2220 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 600 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.20 % Strong Segment median 22.26%
Vmpp · Impp 44.66 V · 13.44 A Operating point at max power
Voc · Isc 52.81 V · 14.46 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2278×1134×30 mm · 2.58 m² of roof
Weight 27.2 kg Strong Strong · 4.3 kg below median
Cells 144 Monocrystalline
Coefficient Pmax -0.290 %/°C Typical median -0.300 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 11% · median 30 yrs
End-of-warranty output 88.9 % Equals 521 W guaranteed
Degradation 1.50 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

Measured curves published by Longi Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 600 Wp appear here. The rest cover the whole series.

25-Year Power Warranty 25-Year Power Warranty Whole series

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
-0.290 %/°C against a segment median of -0.300
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Longi Solar LR5-72HTH-600M 600 W 23.20% -0.290 27.2 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +50 W, +2.0 pp, +5 yr warranty
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg +45 W, +1.8 pp, +5 yr warranty
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg -40 W, +1.6 pp, +5 yr warranty
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg +40 W, +1.6 pp, +5 yr warranty
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg -45 W, +1.4 pp, +5 yr warranty
AIKO-A635-MAE72Mw 635 W 24.60% -0.260 27.0 kg +35 W, +1.4 pp, +5 yr warranty
RL530HM 530 W 20.70% -0.470 27.0 kg -70 W, hotter, -2.5 pp
RL535HM 535 W 20.90% -0.470 27.0 kg -65 W, hotter, -2.3 pp
LR5-72HBD-540M 540 W 20.90% -0.340 31.8 kg -60 W, hotter, -2.3 pp
RL540HM 540 W 21.10% -0.470 27.0 kg -60 W, hotter, -2.1 pp
LR5-72HPH-545M 545 W 21.10% -0.340 27.5 kg -55 W, hotter, -2.1 pp
RL545HM 545 W 21.30% -0.470 27.0 kg -55 W, hotter, -1.9 pp
LR5-72HBD-550M 550 W 21.30% -0.340 31.8 kg -50 W, hotter, -1.9 pp
RL550HM 550 W 21.50% -0.470 27.0 kg -50 W, hotter, -1.7 pp
AIKO-A630-MAH72Dw 630 W 24.40% -0.260 32.5 kg Heavier, +1.2 pp, +5 yr warranty

Found 2327 panels of the same or similar size to this one, within ±10 mm. See them here Found 2369 panels of the same or similar size to this one, within ±25 mm. See them here Found 2383 panels of the same or similar size to this one, within ±50 mm. See them here Found 2548 panels of the same or similar size to this one, within ±100 mm. See them here

About the Hi-MO X6 Scientist LR5-72HTH 590~600M series

6 answered

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

What is HPBC+ technology in the LONGi Hi-MO X6 Scientist series and why does it matter?
HPBC+ (High-Performance Back Contact) moves all current-collecting electrodes to the rear side of the cell, leaving the front surface fully exposed to sunlight. This eliminates shading from metal busbars, pushes cell efficiency above 25.8%, and improves low-light performance. For locations with frequent overcast conditions, the gain in diffuse-light harvesting results in a measurable increase in annual energy yield compared to conventional front-contact designs.
What warranty does the LONGi Hi-MO X6 Scientist LR5-72HTH 590-600M come with?
The Hi-MO X6 Scientist LR5-72HTH carries a 15-year product warranty covering manufacturing defects and a 25-year linear power warranty guaranteeing at least 87.4% of rated output at end of life. LONGi Solar holds Tier 1 status per BloombergNEF, which supports the long-term credibility of these warranty commitments over the module's operational lifetime.
How does the Hi-MO X6 Scientist perform during summer heat?
Very well compared to most alternatives. The temperature coefficient of Pmax is only -0.29%/°C, whereas standard PERC modules typically run -0.34 to -0.36%/°C. At a cell temperature of 70°C, the difference can reach 1.5-2% of output power - a meaningful revenue advantage for large C&I rooftops or ground-mount PV plants operating through peak summer months.
Is the LONGi LR5-72HTH 600M suitable for industrial or commercial rooftop installations?
Yes. The module measures 2278×1134×35 mm and weighs 27.5 kg, with a front load rating of 5400 Pa and rear load of 2400 Pa. At up to 600 Wp per panel, fewer modules are needed for a given capacity, directly reducing BoS costs. An IP68-rated junction box and certified hail resistance (25 mm diameter at 23 m/s) ensure reliability on demanding industrial rooftops and utility-scale PV farms.
How does the LONGi Hi-MO X6 Scientist compare to standard PERC modules in the same power class?
The core difference lies in cell architecture. Typical 72-cell PERC modules reach 20.5-21.5% efficiency, while the Hi-MO X6 Scientist with HPBC+ reaches up to 23.2%. Eliminating front-side metal grids also improves diffuse-light performance. The module is monofacial, so installation is straightforward without albedo optimization requirements, but it does not capture reflected ground irradiance the way bifacial panels do.
How many cells does the Hi-MO X6 Scientist LR5-72HTH have, and does the half-cut design help with partial shading?
The module uses 144 half-cut HPBC+ cells split into two independent electrical halves. When a chimney, antenna, or roof edge partially shades the panel, only one half is affected rather than the entire string. This reduces mismatch losses and keeps output more stable on complex rooftops. A secondary benefit is lower resistive losses per cell, since the operating current in each half-cell is reduced by roughly half.
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