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Longi Solar LR7-72HVH-665M
Longi Solar Brand review

LR7-72HVH-665M

665 Wp N-type
ComparePV verdict

Light for its output, no clear weak spot

Rank 387 of 14,005
Compare panels Datasheet PDF
Power (Wp)
665
Typical for its class
Efficiency (%)
24.60
Strong · top 9%
Density (Wp/m²)
246.2
Strong · top 8%
Temp (%/°C)
-0.260
Strong · top 24%
Weight (kg)
28.5
Strong · 5.0 kg below median
Warranty (yrs)
30
Typical · median 30 yrs

The Longi Solar Hi-MO X10 Guardian (Anti-Glare) LR7-72HVH 640-670M series was designed with installations in mind where not only energy yield matters, but also the surrounding environment. Its key advantage is the advanced anti-glare glass with a special textured structure - it reduces annoying reflections, making it ideal in glare-sensitive locations, such as near residential buildings, roads, or infrastructure sites.

What sets this series apart from many panels with anti-reflective coatings is its focus on longevity: integral embossing and a coating-free construction help maintain the anti-glare effect over the long term and minimize the risk of performance degradation due to the aging of the top layer. Additionally, the applied BC (back contact) technology supports high efficiency with an elegant front appearance, which appeals to premium investors. In practice, this delivers uncompromised performance - reduced reflections without typical light absorption loss - and a series designed for projects where aesthetic and environmental requirements are just as important as energy production.

Ranking

109 panels in the segment N-type 650-700 W
Metric This panel Median Position in segment Overall rank
Module efficiency 24.60% 23.30% Strong · top 9% 51
Power density 246.2 233.2 Strong · top 8% 42
Temperature coefficient -0.260 -0.290 Strong · top 24% 511
Weight per kWp 42.9 50.9 Strong · top 3% 244
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

8 positive · 3 caution
Best for

Utility-scale, commercial, shaded-installations and hot-climate.

Strengths
42.9 kg per kWp

Top 3% of the N-type 650-700 W segment, against a median of 50.9. Ranked 244th in the whole database.

246.2 watts per square metre

Top 8% of the N-type 650-700 W segment, against a median of 233.2. Ranked 42nd in the whole database.

24.60% module efficiency

Top 9% of the N-type 650-700 W segment, against a median of 23.30%. Ranked 51st in the whole database.

What owners get
Record efficiency via BC technology

Built on N-type HPBC 2.0 (back contact) cells, the module reaches up to 24.8% efficiency and 670 W, roughly 3.2 pp higher than comparable models Hiwatt HW-M12/132H, Techwise Summit, and Resun RS9H-M (~21.6%). This delivers real extra yield from the same roof area.

Low -0.26%/°C temperature coefficient

The -0.26%/°C rating is notably better than the typical -0.34 to -0.35%/°C seen in standard PERC/TOPCon modules, translating to a smaller power drop under high roof operating temperatures.

Durable anti-glare without a coating layer

The anti-glare effect is achieved through integral glass embossing rather than an added coating prone to UV degradation and abrasion, reducing the risk of the anti-reflective properties fading over the module's lifetime.

Extended 15/30-year warranty

The manufacturer offers a 15-year product warranty and a 30-year linear power warranty (99% in year 1, approx. 88.85% in year 30), exceeding the industry-standard 12/25 years and lowering degradation risk for investors.

Tier-1 bankable manufacturer

Longi Solar, founded in 2000, is a global market leader in PV modules and recognized as Tier-1 bankable, easing project financing and reducing insurance requirements compared to less established peer brands.

Trade-offs
No bifacial version available

The series is monofacial (is_bifacial: false), so it cannot capture the additional yield from reflected light off the ground - a notable limitation for ground-mount projects on high-albedo surfaces, where bifacial modules could add several extra percentage points of energy.

Higher cost of BC technology vs. TOPCon

Back contact modules remain roughly 15-30% more expensive than comparable TOPCon modules (2025 market data), which can lengthen payback periods compared with cheaper Tier-1 series.

More complex field servicing

The back contact cell architecture makes field repairs and diagnostics more challenging than with standard PERC/TOPCon modules, a factor worth considering for long-term service and spare-parts availability.

Notes from the database
  • 24.6% module efficiency - 1.3pp better than the N-type 650-700W median of 23.3%
  • 246.2 W/m² power density - 13.0 W/m² more than N-type 650-700W median (233.2 W/m²), more power per roof area
  • Temperature coefficient of -0.26%/°C vs median -0.29%/°C means ~1% less power loss at 65°C
  • 28.5 kg weight - 5.0 kg lighter than N-type 650-700W median (33.5 kg), reducing installation effort
  • #51 for efficiency, #511 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 665 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 24.60 % Strong Segment median 23.30%
Vmpp · Impp 44.86 V · 14.83 A Operating point at max power
Voc · Isc 54.20 V · 15.52 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 · 5.0 kg below median
Cells 144 · N-type Monocrystalline
Coefficient Pmax -0.260 %/°C Strong top 24% of its segment
Coefficient Voc · Isc -0.200 · 0.050 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 88.8 % Equals 591 W guaranteed
Degradation 1.00 → 0.35 % 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 665 Wp appear here. The rest cover the whole series.

30-Year Power Warranty 30-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
-0.260 %/°C against a segment median of -0.290
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Longi Solar LR7-72HVH-665M 665 W 24.60% -0.260 28.5 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg -15 W, lighter, +0.6 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +15 W, +0.6 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +10 W, +0.4 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg -20 W, lighter, +0.4 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +35 W, heavier, +0.4 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +30 W, heavier, +0.3 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg Very close match
LR8-66HGD-595M 595 W 22.00% -0.280 32.5 kg -70 W, heavier, -2.6 pp
LR7-72HGD-600M 600 W 22.20% -0.280 33.5 kg -65 W, heavier, -2.4 pp
600M 600 W 22.40% -0.280 31.0 kg -65 W, -2.2 pp, -5 yr warranty
LR7-72HTH-605M 605 W 22.40% -0.280 28.5 kg -60 W, -2.2 pp, -5 yr warranty
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg Very close match
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg Heavier

Found 1119 panels of the same or similar size to this one, within ±10 mm. See them here Found 1125 panels of the same or similar size to this one, within ±25 mm. See them here Found 1236 panels of the same or similar size to this one, within ±50 mm. See them here Found 1917 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How does the LONGi Hi-MO X10 Guardian Anti-Glare series differ from standard solar panels?
The key difference is an embossed textured glass surface that reduces localized glare intensity without relying on a degradable anti-reflective coating. Standard panels use AR coatings that lose effectiveness over time. In the Guardian series, the anti-glare effect is integral to the glass structure, preserving optical performance throughout the module's lifetime. This makes it the right choice for installations near roads, residential neighborhoods, or airports where panel glare is a regulatory or comfort concern.
What efficiency do the LONGi Hi-MO X10 Guardian Anti-Glare LR7-72HVH panels achieve and what drives it?
The 670M variant delivers 670 Wp at up to 24.8% module efficiency, placing it among the top-performing N-type panels on the market. The BC (back contact) cell technology moves all busbars and contacts to the rear side, leaving the entire front surface unobstructed for light absorption. The result is maximum energy harvest with no optical compromise — high efficiency without sacrificing the anti-glare surface treatment.
What warranty does LONGi offer for the Hi-MO X10 Guardian Anti-Glare LR7-72HVH 640-670M series?
LONGi provides a 15-year product warranty covering physical defects and a 30-year power warranty. First-year degradation is capped at ≤1%, followed by ≤0.35%/year, guaranteeing at least 88.85% of rated power after 30 years. For a Tier 1 manufacturer, this represents one of the most competitive degradation profiles available and is a strong argument for long-term LCOE calculations.
Do the LONGi Hi-MO X10 Guardian Anti-Glare panels suffer significant power loss on hot days?
No, this series performs well under heat. The temperature coefficient of Pmax is -0.26%/°C, meaning every 10°C rise above STC conditions costs only 2.6% of output — better than the typical -0.30 to -0.35%/°C seen in older PERC modules. N-type BC cell technology inherently operates at a lower cell temperature, translating into measurably higher real-world energy yields during hot summer afternoons.
How heavy is the LONGi Hi-MO X10 Guardian Anti-Glare panel and is it suitable for a standard pitched roof?
The module weighs 28.5 kg with dimensions of 2382×1134×30 mm. A structural assessment of the roof is recommended before installation, although most properly built residential roofs handle this load without issue. The aluminum frame and 3.2 mm tempered glass provide snow and wind load resistance compliant with IEC standards. The size does require standard two-person handling on the roof, which is normal practice for this power class.
Is the LONGi Hi-MO X10 Guardian Anti-Glare series compatible with standard inverters and mounting systems?
Yes. The panels support a maximum system voltage of 1500 V DC and are compatible with most string inverters and power optimizers available on the market. MC4-compatible connectors with approximately 1200 mm cable length simplify wiring, and the standard frame mounting hole pattern fits common racking profiles. No proprietary hardware is required, making integration into a typical BoS straightforward for any experienced installer.
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