--- title: "Longi Solar LR7-72HTDR-605M 605W Solar Panel - Specs & Review | ComparePV" description: "Longi Solar LR7-72HTDR-605M 605W solar panel. Specs: 22.40% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/longi-lr7-72htdr-605m" updated: 2026-09-11 --- # Longi Solar LR7-72HTDR-605M Strong in heat, heavy for its output 359 panels in the segment N-type 600-650 W ## Identity - **Manufacturer:** Longi Solar - **Model:** LR7-72HTDR-605M - **Series:** Hi-MO X6 Guardian LR7-72HTDR 600~625M - **Rated power:** 605 W - **Cell technology:** N-type - **Bifacial:** yes ## How it compares Compared against segment N-type 600-650 W (359 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 605 W | 625 W | Weak - bottom 10% | | | Module efficiency | 22.40% | 22.77% | Typical | 4,774 | | Power density | 224.0 | 227.7 | Typical | 4,780 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 14% | 1,309 | | Weight (kg) | 33.5 kg | 32.5 kg | Weak - bottom 16% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.40% | 22.77% | Typical | 4,774 | | Power density | 224.0 | 227.7 | Typical | 4,780 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 14% | 1,309 | | Weight per kWp | 55.4 | 52.7 | Weak - bottom 16% | 9,806 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **-0.280 %/°C temperature coefficient** - Top 14% of the N-type 600-650 W segment, against a median of -0.290. ### Watch out for - **55.4 kg per kWp** - Bottom 16% of the N-type 600-650 W segment, against a median of 52.7. - **Best for:** Utility-scale, commercial and hot-climate. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 605 W - **Efficiency:** 22.40 % - **Voltage at Pmax (Vmp):** 44.33 V - **Current at Pmax (Imp):** 13.65 A - **Open-circuit voltage (Voc):** 52.66 V - **Short-circuit current (Isc):** 14.62 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.280 %/degC - **Temperature coefficient of Voc:** -0.230 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** N-type - **Cell count:** 144 - **Bifacial:** yes ### Physical - **Length:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 33.5 kg - **Area:** 2.70 m2 - **Power density:** 224.0 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:** 538 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 4774 of 14005 | | Power density | 4780 of 14005 | | Temperature coefficient | 1309 of 14005 | | Weight | 9806 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Damp heat climate resistance** - Thanks to waterproof POE encapsulation and reinforced sealing, the manufacturer specifies an annual power degradation of approximately 0.35%/year, notably lower than the typical 0.4-0.55%/year seen in standard PERC modules operating in high-humidity conditions. - **N-type HPBC busbar-free cells** - The back-contact architecture eliminates front-side busbars, reducing shading losses and pushing module efficiency up to 23.1% - a level comparable to the segment's top performers, such as DAH Solar DHN-72R20/DG (23.14%). - **Bifacial dual-glass construction** - Bifaciality of 60±5% combined with a dual-glass design enables additional rear-side energy yield, particularly beneficial on bright/reflective surfaces (gravel, light-colored roofs, waterside sites). - **30-year linear power warranty** - The 30-year power warranty exceeds the 25-year standard offered by most Tier-1 manufacturers (including some other Longi series), meaningfully lowering LCOE and long-term yield-loss risk over the investment horizon. - **Proven Tier-1 bankable manufacturer** - Longi Solar has operated since 2000 and is ranked among Tier-1 bankable manufacturers, easing project financing through banks and leasing institutions and reducing the risk of interrupted warranty support. ## Cons - **Product warranty limited to 15 years** - While the power warranty extends to 30 years, the product (materials/workmanship) warranty remains a standard 15 years - below the growing market trend where some Tier-1 manufacturers now offer 25-year product warranties aligned with the power warranty. - **Full bifacial potential is installation-dependent** - Realizing the additional rear-side yield (bifaciality of 60±5%) requires adequate mounting height and a high-albedo ground surface - in a typical rooftop installation on a dark surface, the actual energy bonus can be significantly lower than the stated potential. ## About this series SERIA LONGI SOLAR HI-MO X6 GUARDIAN LR7-72HTDR 600-625M is designed for environments where conventional modules degrade faster - in high humidity and elevated temperature conditions. Its key advantage is **damp heat resistance**, enabled by the refined HPBC (back contact) cell architecture and material solutions that limit moisture impact on active layers. The design also incorporates **hydrophobic encapsulation and reinforced seals**, which help reduce the risk of micro-cracks and power degradation over the long term. The dual-glass, double-sided construction provides **additional potential for power generation on the rear side** where light reflects from the ground, and the **front side free of busbars** supports stable performance and module field aesthetics. This is an excellent choice for rooftop and ground installations, carports, and high-humidity applications (e.g., areas near water reservoirs), where **reliability and lower service costs** throughout the installation lifecycle matter. ## Notable figures - Efficiency of 22.4% matches the \*\*N-type 600-650W\*\* median - 224.0 W/m² power density is 3.7 W/m² below \*\*N-type 600-650W\*\* median (227.7 W/m²) - requires larger installation area - Temperature coefficient of -0.28%/°C matches the \*\*N-type 600-650W\*\* median - Weight of 33.5 kg is typical for \*\*N-type 600-650W\*\* panels - Bifacial design (60% factor) captures reflected light - adds 3-9% yield on ground-mount or white roof ## Questions ### What is the warranty on the LONGi Solar Hi-MO X6 Guardian LR7-72HTDR 600–625M panels? LONGi Solar provides a 15-year product warranty covering material and workmanship defects, along with a 30-year linear power output warranty. Annual degradation is only about 0.35%, meaning the module retains over 87.4% of its rated power after 30 years. This is among the most competitive warranty packages available for Tier 1 premium modules. ### Are the LONGi Hi-MO X6 Guardian LR7-72HTDR panels suitable for high-humidity environments or locations near bodies of water? Yes, the Guardian LR7-72HTDR series is specifically engineered for those conditions. It features a three-layer moisture-resistant encapsulation with high-purity POE film, reinforced edge sealing, and customized low-lead electrodes designed for damp heat environments. The dual-glass construction further prevents moisture ingress into the active layers, reducing the risk of long-term degradation and lowering O&M costs. ### What is HPBC technology in the LONGi X6 Guardian and does it actually improve energy yield? HPBC (High-efficiency Back Contact) is an N-type cell architecture where all metal contacts are moved to the rear of the cell, leaving the front surface entirely busbar-free. This allows more light to reach the active material, pushing module efficiency up to 23.2%. In practice, this delivers higher yield per square meter compared to conventional PERC or TOPCon modules of similar rated power. ### What is the maximum power output and efficiency of the LONGi Hi-MO X6 Guardian LR7-72HTDR 625M panel? The top variant in the series delivers 625 Wp at a module efficiency of up to 23.2%. Dimensions are 2278 × 1134 × 30 mm and the module weighs approximately 31.8 kg. It withstands a front load of 5400 Pa and rear load of 2400 Pa, making it suitable for pitched rooftops, ground-mount systems, and carport structures. ### Is the LONGi Hi-MO X6 Guardian LR7-72HTDR bifacial and what energy gain can I expect? Yes, the module is bifacial with a dual-glass design and a bifaciality factor of 60% (±5%). The additional rear-side yield depends on ground albedo — reflective surfaces such as white gravel or light-colored concrete can contribute several additional percentage points of energy output compared to a monofacial module. The bifacial gain is most pronounced in ground-mount and carport installations with high-albedo surfaces. ### What types of installations are the LONGi Hi-MO X6 Guardian LR7-72HTDR 600–625M panels best suited for? This series is best suited for applications where moisture and heat resistance are critical: industrial facilities near water, agrivoltaic farms, carports, and ground-mount systems in subtropical or coastal climates. It also performs well on flat and pitched commercial rooftops where the high unit power (up to 625 Wp) maximizes energy production within a limited footprint. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/lr-7-72-htdr-600-625-m-30-30-and-15-frame-20240527-v2-9cb604-104b50d23fe3.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +45 W, lighter, +2.8 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +40 W, lighter, +2.6 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | -45 W, lighter, +2.4 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +35 W, lighter, +2.4 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | -50 W, lighter, +2.2 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +30 W, lighter, +2.2 pp | | [Longi Solar LR8-66HGD-595M](https://comparepv.com/panel/longi-lr8-66hgd-595m) | 595 W | -10 W, lighter, -0.4 pp | | [Longi Solar LR7-72HGD-600M](https://comparepv.com/panel/longi-lr7-72hgd-600m) | 600 W | Very close match | | [Longi Solar 600M](https://comparepv.com/panel/longi-600m) | 600 W | Lighter, -5 yr warranty | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +75 W, lighter, +2.8 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +70 W, lighter, +2.6 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +95 W, cooler, +2.6 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +90 W, cooler, +2.5 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +65 W, lighter, +2.4 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +65 W, lighter, +2.4 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +65 W, cooler, +2.4 pp | --- Source: https://comparepv.com/panel/longi-lr7-72htdr-605m Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.