--- title: "Longi Solar LR7-72HTH-625M Solar Panel: Specs & Datasheet | ComparePV" description: "Longi Solar LR7-72HTH-625M solar panel. Specs: 23.10% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/longi-lr7-72hth-625m" image: "https://comparepv.com/og/panel/longi-lr7-72hth-625m.png" updated: 2026-09-11 --- # Longi Solar LR7-72HTH-625M Light for its output, short guarantee 368 panels in the segment N-type 600-650 W ## Identity - **Manufacturer:** Longi Solar - **Model:** LR7-72HTH-625M - **Series:** Hi-MO X6 Scientist (LR7-72HTH 620~630M) - **Rated power:** 625 W - **Cell technology:** N-type ## How it compares Compared against segment N-type 600-650 W (368 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 625 W | 625 W | Typical | | | 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 (kg) | 28.5 kg | 32.8 kg | Strong - top 7% | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 4% | 9,912 | ### Full peer table | Measure | This panel | Segment median | Standing | 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 | ### 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 out for - **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. - **Best for:** Commercial, utility-scale, hot-climate and shaded-installations. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 625 W - **Efficiency:** 23.10 % - **Voltage at Pmax (Vmp):** 44.63 V - **Current at Pmax (Imp):** 14.01 A - **Open-circuit voltage (Voc):** 52.87 V - **Short-circuit current (Isc):** 15.01 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 ### Physical - **Length:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 28.5 kg - **Area:** 2.70 m2 - **Power density:** 231.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 89.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 546 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1617 of 14129 | | Power density | 1558 of 14129 | | Temperature coefficient | 1347 of 14129 | | Weight | 775 of 14129 | | Warranty | 9912 of 14129 | ## Pros - **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. ## Cons - **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. ## About this series 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. ## Notable figures - 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 ## Questions ### 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. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/lr-7-72-hth-620-630-m-30-30-and-15-frame-scientist-20240511-77ac5fce6041.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +25 W, +2.1 pp, +5 yr warranty | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +50 W, +1.9 pp, +5 yr warranty | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, +1.9 pp, +5 yr warranty | | [WINAICO WST-675BKX72-A2](https://comparepv.com/panel/winaico-wst-675bkx72-a2) | 675 W | +50 W, +1.9 pp, +5 yr warranty | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +45 W, +1.7 pp, +5 yr warranty | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +45 W, +1.7 pp, +5 yr warranty | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, +1.7 pp, +5 yr warranty | | [Longi Solar LR8-66HGD-595M](https://comparepv.com/panel/longi-lr8-66hgd-595m) | 595 W | Heavier, -1.1 pp, +5 yr warranty | | [Longi Solar LR7-72HGD-600M](https://comparepv.com/panel/longi-lr7-72hgd-600m) | 600 W | Heavier, -0.9 pp, +5 yr warranty | | [Longi Solar 600M](https://comparepv.com/panel/longi-600m) | 600 W | -25 W, heavier, -0.7 pp | | [Longi Solar LR7-72HTH-605M](https://comparepv.com/panel/longi-lr7-72hth-605m) | 605 W | -20 W, -0.7 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +55 W, +2.1 pp, +5 yr warranty | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +75 W, heavier, +1.9 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +70 W, heavier, +1.8 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +45 W, +1.7 pp, +5 yr warranty | --- Source: https://comparepv.com/panel/longi-lr7-72hth-625m 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.