--- title: "Longi Solar LR7-72HVH-665M 665W Solar Panel - Specs & Review | ComparePV" description: "Longi Solar LR7-72HVH-665M 665W solar panel. Specs: 24.60% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/longi-lr7-72hvh-665m" updated: 2026-09-11 --- # Longi Solar LR7-72HVH-665M Light for its output, no clear weak spot 109 panels in the segment N-type 650-700 W ## Identity - **Manufacturer:** Longi Solar - **Model:** LR7-72HVH-665M - **Series:** Hi-MO X10 Guardian (Anti-Glare) / LR7-72HVH 640~670M - **Rated power:** 665 W - **Cell technology:** N-type ## How it compares Compared against segment N-type 650-700 W (109 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 665 W | 660 W | Typical | | | 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 (kg) | 28.5 kg | 33.5 kg | Strong - top 3% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | 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 | ### 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. - **Best for:** Utility-scale, commercial, shaded-installations and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 665 W - **Efficiency:** 24.60 % - **Voltage at Pmax (Vmp):** 44.86 V - **Current at Pmax (Imp):** 14.83 A - **Open-circuit voltage (Voc):** 54.20 V - **Short-circuit current (Isc):** 15.52 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.260 %/degC - **Temperature coefficient of Voc:** -0.200 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** N-type - **Cell count:** 144 ### Physical - **Length:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 28.5 kg - **Area:** 2.70 m2 - **Power density:** 246.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 88.8 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.35 % - **Output after 30 years:** 591 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 51 of 14005 | | Power density | 42 of 14005 | | Temperature coefficient | 511 of 14005 | | Weight | 244 of 14005 | | Warranty | 21 of 14005 | ## Pros - **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. ## Cons - **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. ## About this series 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. ## Notable figures - 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 ## Questions ### 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. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/lr-7-72-hvh-640-670-m-30-30-and-15-black-frame-anti-glare-bg-9630537a601f.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | -15 W, lighter, +0.6 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +15 W, +0.6 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +10 W, +0.4 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | -20 W, lighter, +0.4 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +35 W, heavier, +0.4 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +30 W, heavier, +0.3 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Very close match | | [Longi Solar LR8-66HGD-595M](https://comparepv.com/panel/longi-lr8-66hgd-595m) | 595 W | -70 W, heavier, -2.6 pp | | [Longi Solar LR7-72HGD-600M](https://comparepv.com/panel/longi-lr7-72hgd-600m) | 600 W | -65 W, heavier, -2.4 pp | | [Longi Solar 600M](https://comparepv.com/panel/longi-600m) | 600 W | -65 W, -2.2 pp, -5 yr warranty | | [Longi Solar LR7-72HTH-605M](https://comparepv.com/panel/longi-lr7-72hth-605m) | 605 W | -60 W, -2.2 pp, -5 yr warranty | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | Very close match | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | Heavier | --- Source: https://comparepv.com/panel/longi-lr7-72hvh-665m Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.