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Longi Solar LR7-72HTH-625M
Longi Solar Brand review

LR7-72HTH-625M

625 Wp N-type
ComparePV verdict

Light for its output, short guarantee

Rank 2,582 of 14,129
Compare panels Datasheet PDF
Power (Wp)
625
Typical for its class
Efficiency (%)
23.10
Typical · median 22.77%
Density (Wp/m²)
231.4
Typical · median 227.7
Temp (%/°C)
-0.280
Strong · top 15%
Weight (kg)
28.5
Strong · 4.2 kg below median
Warranty (yrs)
25
Weak · bottom 4%

The Longi Solar Hi-MO X6 Scientist (LR7-72HTH 620~630M) series was designed for maximum yield from every meter of installation-especially in locations where high efficiency and stable performance under real-world conditions are critical. The key here is its back-contact architecture: HPBC+ minimizes losses due to front-side busbar shading, translating to better light utilization and more predictable daily energy production.

In practice, this is a series for investors looking to increase installation output without expanding the area-ideal for PV farms, carports, and large industrial/commercial rooftops. Its reinforced construction with full stringer welding enhances resistance to micro-cracking, which is essential during transport, installation, and long-term operation. Additionally, extended warranty conditions facilitate project financial planning.

Against the competition, the Hi-MO X6 Scientist stands out by combining high aesthetics (no visible busbars) with a focus on reliability and performance-not just the rated power.

Ranking

368 panels in the segment N-type 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 23.10% 22.77% Typical 1,617
Power density 231.4 227.7 Typical 1,558
Temperature coefficient -0.280 -0.290 Strong · top 15% 1,347
Weight per kWp 45.6 52.8 Strong · top 7% 775
Performance warranty 25 yrs 30 yrs Weak · bottom 4% 9,912
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

7 positive · 4 caution
Best for

Commercial, utility-scale, hot-climate and shaded-installations.

Not ideal for

Owners who want a long output guarantee.

Strengths
45.6 kg per kWp

Top 7% of the N-type 600-650 W segment, against a median of 52.8. Ranked 775th in the whole database.

-0.280 %/°C temperature coefficient

Top 15% of the N-type 600-650 W segment, against a median of -0.290.

Watch-outs
25 year performance warranty

Bottom 4% of the N-type 600-650 W segment, against a median of 30 yrs. Ranked 9,912th in the whole database.

What owners get
HPBC+ busbar-free front architecture

Back-contact cells eliminate front-side grid shading from busbars, improving light utilization and yielding more predictable energy output throughout the day compared to conventional TOPCon modules with visible front busbars.

Certified hot-spot resistance

LONGi's HPBC technology holds TÜV Rheinland certification for anti-shading performance - comparative testing showed HPBC module temperatures under partial shading running dozens of degrees lower than TOPCon modules, reducing the risk of permanent cell degradation.

Reinforced mechanical construction

Full rear-side welding of the cells improves resistance to microcracks during transport and installation, which matters for large-scale industrial rooftop and utility-scale PV projects.

23.3% efficiency in line with segment leaders

The maximum 23.3% module efficiency matches Canadian Solar's TOPBiHiKu6 (23.3%) and trails Resun RS8H-M-BD and Jinko Tiger Neo BDV (23.32%) only marginally, placing the series firmly in the top tier of 620-630 Wp N-type modules.

Tier-1 bankable manufacturer

LONGi Solar has operated since 2000 and remains a Tier-1 manufacturer recognized by project financiers, lowering financing risk for institutional investors.

Trade-offs
No bifacial variant

Unlike comparable series from competitors - Canadian Solar TOPBiHiKu6 (bifacial), Resun RS8H-M-BD, and Jinko Tiger Neo BDV (both dual-glass bifacial) - the Hi-MO X6 Scientist LR7-72HTH is monofacial, forgoing the extra rear-side yield available in ground-mount and carport installations, even though the manufacturer targets the series at exactly these applications.

Warranty at Tier-1 baseline, not premium

15 years product / 25 years linear power warranty is the typical Tier-1 baseline for 2024-2026, but does not stand out against a growing number of 25/30-year offers on the market, including LONGi's own newer series (e.g., Hi-MO X10).

Slightly lower efficiency than top peers

Maximum efficiency of 23.3% is 0.02 percentage points below Resun RS8H-M-BD and Jinko Tiger Neo BDV (23.32%) - a marginal gap, but it means the series is not the outright efficiency leader in its power class.

Notes from the database
  • At 23.1% efficiency, this panel is on par with typical N-type 600-650W modules
  • 231.4 W/m² power density - 3.7 W/m² more than N-type 600-650W median (227.7 W/m²), more power per roof area
  • At -0.28%/°C, hot weather performance is typical for N-type 600-650W panels
  • At 28.5 kg, this panel is 4.3 kg lighter than N-type 600-650W median (32.8 kg) - easier handling during installation
  • #1617 for efficiency, #1347 for temperature performance out of 14129 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 625 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 23.10 % Typical Segment median 22.77%
Vmpp · Impp 44.63 V · 14.01 A Operating point at max power
Voc · Isc 52.87 V · 15.01 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2382×1134×30 mm · 2.70 m² of roof
Weight 28.5 kg Strong Strong · 4.2 kg below median
Cells 144 · N-type Monocrystalline
Coefficient Pmax -0.280 %/°C Strong top 15% 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 4% · median 30 yrs
End-of-warranty output 89.4 % Equals 546 W guaranteed
Degradation 1.00 → 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 625 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
-0.280 %/°C against a segment median of -0.290
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Longi Solar LR7-72HTH-625M 625 W 23.10% -0.280 28.5 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +25 W, +2.1 pp, +5 yr warranty
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +50 W, +1.9 pp, +5 yr warranty
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, +1.9 pp, +5 yr warranty
WST-675BKX72-A2 675 W 25.00% -0.260 32.1 kg +50 W, +1.9 pp, +5 yr warranty
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +45 W, +1.7 pp, +5 yr warranty
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +45 W, +1.7 pp, +5 yr warranty
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, +1.7 pp, +5 yr warranty
LR8-66HGD-595M 595 W 22.00% -0.280 32.5 kg Heavier, -1.1 pp, +5 yr warranty
LR7-72HGD-600M 600 W 22.20% -0.280 33.5 kg Heavier, -0.9 pp, +5 yr warranty
600M 600 W 22.40% -0.280 31.0 kg -25 W, heavier, -0.7 pp
LR7-72HTH-605M 605 W 22.40% -0.280 28.5 kg -20 W, -0.7 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +55 W, +2.1 pp, +5 yr warranty
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +75 W, heavier, +1.9 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +70 W, heavier, +1.8 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +45 W, +1.7 pp, +5 yr warranty

Found 1144 panels of the same or similar size to this one, within ±10 mm. See them here Found 1150 panels of the same or similar size to this one, within ±25 mm. See them here Found 1261 panels of the same or similar size to this one, within ±50 mm. See them here Found 1942 panels of the same or similar size to this one, within ±100 mm. See them here

About the Hi-MO X6 Scientist (LR7-72HTH 620~630M) 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 panels and does it actually generate more energy?
HPBC+ is a back-contact cell architecture that moves all electrodes to the rear side of the cell. This eliminates shading losses from the front metal grid, boosting cell efficiency up to 25.8% and improving light absorption throughout the day. In real-world terms, it delivers more energy from the same installation area compared to conventional PERC or TOPCon modules with visible busbars.
What are the dimensions and weight of the Longi Hi-MO X6 Scientist LR7-72HTH panel and does it fit on an industrial roof?
The Hi-MO X6 Scientist LR7-72HTH panel measures 2382 × 1134 × 30 mm and weighs 28.5 kg. This format is designed for large-scale installations - industrial rooftops, utility solar farms, and carports - where maximizing energy yield per unit area is critical. Before purchasing, verify the structural load capacity of the roof, as modules of this size are heavier than typical residential panels rated at 400-430 W.
What warranty comes with the Longi Hi-MO X6 Scientist LR7-72HTH 620-630M series?
The Hi-MO X6 Scientist LR7-72HTH series comes with a 15-year product warranty covering material and workmanship defects, plus a 25-year linear power output warranty. LONGi Solar is a Tier 1 manufacturer, meaning these warranty commitments are backed by a financially stable company. The extended warranty period simplifies financial modeling and LCOE calculations for utility-scale and commercial projects.
How does the Longi Hi-MO X6 Scientist perform on hot days - does it lose a lot of power?
The temperature coefficient of Pmax for the Hi-MO X6 Scientist is -0.28%/°C, which is among the best figures on the market - standard PERC modules typically run around -0.35%/°C. On a hot day when the module surface reaches 70°C, power losses will be noticeably lower than with older cell technologies. This translates into higher annual energy yield, especially in Central European climates with increasingly frequent heat waves.
Is the Longi Hi-MO X6 Scientist LR7-72HTH suitable for carports and utility-scale solar farms?
Yes, the Hi-MO X6 Scientist series, with up to 630 W per module and efficiency up to 23.3%, is designed for commercial and utility-scale applications: solar farms, large industrial rooftops, and carports. Higher per-module power reduces the total unit count in an installation and lowers BoS costs. The reinforced full back-welded frame increases resistance to vibration during transport and long-term operation.
How does the Longi Hi-MO X6 Scientist differ from standard N-type panels with visible busbars?
The key difference is the complete absence of visible metal busbars on the front surface - all contacts are hidden on the rear side of the cell. The result is a uniform, all-black aesthetic that is especially valued in high-visibility installations such as carports and commercial building rooftops. Eliminating front-side busbars also reduces internal shading losses and improves long-term cell reliability, setting the Hi-MO X6 Scientist apart from typical TOPCon or HJT modules with a conventional busbar layout.
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