--- title: "Longi Solar LR7-72HTH-605M 605W Solar Panel - Specs & Review | ComparePV" description: "Longi Solar LR7-72HTH-605M 605W solar panel. Specs: 22.40% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/longi-lr7-72hth-605m" updated: 2026-09-11 --- # Longi Solar LR7-72HTH-605M Strong in heat, short guarantee 359 panels in the segment N-type 600-650 W ## Identity - **Manufacturer:** Longi Solar - **Model:** LR7-72HTH-605M - **Series:** LR7-72HTH 605~615M (Hi-MO X6 Explorer) - **Rated power:** 605 W - **Cell technology:** N-type ## 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) | 28.5 kg | 32.5 kg | Strong - top 17% | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 4% | 9,798 | ### 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 | 47.1 | 52.7 | Strong - top 17% | 1,498 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 4% | 9,798 | ### Strengths - **-0.280 %/°C temperature coefficient** - Top 14% of the N-type 600-650 W segment, against a median of -0.290. - **47.1 kg per kWp** - Top 17% of the N-type 600-650 W segment, against a median of 52.7. ### Watch out for - **25 year performance warranty** - Bottom 4% of the N-type 600-650 W segment, against a median of 30 yrs. Ranked 9,798th in the whole database. - **Best for:** Commercial, utility-scale and hot-climate. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 605 W - **Efficiency:** 22.40 % - **Voltage at Pmax (Vmp):** 44.03 V - **Current at Pmax (Imp):** 13.75 A - **Open-circuit voltage (Voc):** 52.27 V - **Short-circuit current (Isc):** 14.74 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:** 224.0 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:** 529 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 4774 of 14005 | | Power density | 4780 of 14005 | | Temperature coefficient | 1309 of 14005 | | Weight | 1498 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **HPBC back-contact cell technology** - Conductive paths are moved to the rear of the cell, eliminating front-side optical shading and delivering higher energy yield under low-irradiance conditions and elevated temperatures compared to conventional PERC designs. - **High efficiency of 22.4-22.8%** - Efficiency up to 22.8% clearly outperforms competing series built on older cell technologies, such as GCL-M12/60H (21.7%) and Risen TITAN (21.7%), at the same 615 Wp maximum power. - **Tier-1, bankable manufacturer** - Longi Solar has operated since 2000 and is one of the world's largest module manufacturers, confirming its Tier-1 bankable status - an important factor for financing C&I and utility-scale projects. - **Low LID/LeTID degradation** - N-type cells are less susceptible to light- and temperature-induced degradation than older P-type PERC cells, resulting in more stable energy production over the system's lifetime. - **High unit power up to 615 Wp** - Module power up to 615 Wp reduces the number of panels needed to reach a target system capacity, lowering BoS costs (wiring, racking, labor) in C&I rooftop and ground-mount projects. ## Cons - **Production discontinued** - The series launched in 2024 and was discontinued in 2025, meaning limited availability going forward and potential difficulties with warranty service and matching replacement modules in the future. - **No bifacial variant available** - The module is monofacial, forgoing the additional rear-side yield gain typical of bifacial N-type modules increasingly used in the large ground-mount installations this series targets. - **Power warranty shorter than current market standard** - The 15-year product and 25-year power warranty are shorter than the 30-year linear warranties now common among premium N-type panels, which can affect LCOE calculations for long-term C&I projects. ## About this series The Longi Solar LR7-72HTH 605-615M (Hi-MO X6 Explorer) series was designed to maximize the yield per square meter, where every module and every kilowatt-hour counts. Its key feature is **HPBC (back contact) cell technology**, where the conductive paths are moved to the rear of the cells. This allows the front side of the module to capture more light, and the aesthetics align with the real improvement in performance under suboptimal sunlight conditions. In practice, this translates to **higher energy production in high temperatures and overcast conditions** and reduced losses due to optical shadowing typical of conventional designs. An additional advantage is **greater resistance to micro-cracking**, thanks to connection solutions that limit stress within the structure. These are modules for installations that need to operate reliably and predictably - especially for commercial and industrial (C&I) rooftop projects, on factory halls and warehouses, and in large ground-mounted systems, where **reducing the number of panels and BOS costs** provides quick economic effects. ## Notable figures - At 22.4% efficiency, this panel is on par with typical \*\*N-type 600-650W\*\* modules - Power density of 224.0 W/m² is 3.7 W/m² below \*\*N-type 600-650W\*\* median (227.7 W/m²) - needs more roof space - Temperature coefficient of -0.28%/°C matches the \*\*N-type 600-650W\*\* median - Weight of 28.5 kg (4.0 kg below \*\*N-type 600-650W\*\* median of 32.5 kg) allows easier transport and roof mounting - In the top 34% for efficiency among all N-type panels ## Questions ### What is HPBC technology, and how do the LONGi LR7-72HTH panels differ from standard modules? HPBC (Hybrid Passivated Back Contact) is an N-type cell architecture in which the conductive busbars are relocated to the rear of the cell. The front surface remains unobstructed, improving light absorption compared to conventional PERC designs. In practice, this delivers higher energy yield at low irradiance and eliminates optical shading losses from front-side interconnects — an advantage visible throughout the day, not only at peak irradiance. ### What is the rated power output and efficiency of the LONGi LR7-72HTH 615M? The top variant in the series reaches 615 Wp with a module efficiency of up to 22.8%. The series spans from 605 W to 615 W in 5 W power classes. These figures rank among the highest available for monofacial N-type crystalline modules, enabling a high energy yield per square meter — a key advantage wherever roof or land area is constrained. ### How does the Hi-MO X6 Explorer LR7-72HTH perform in high temperatures and overcast conditions? N-type HPBC cells carry a low temperature coefficient of approximately -0.29%/°C (Pmax), resulting in smaller power losses during summer heat compared to P-type PERC cells (~-0.35%/°C). The back-contact architecture also eliminates optical shading from front-side busbars, improving yield under diffuse light — overcast skies, early morning, and late afternoon — where conventional modules lose proportionally more output. ### What type of installations is the LONGi Hi-MO X6 Explorer LR7-72HTH best suited for? At 2382 × 1134 mm and 28.5 kg, the LR7-72HTH 615M modules are primarily designed for C&I rooftop systems — industrial halls, warehouses, large flat roofs — and utility-scale ground-mount installations. The high unit power output (up to 615 Wp) reduces panel count and cuts BoS costs including cabling, racking, and labor. On steep residential roofs, the module's large footprint may complicate on-roof handling and installation logistics. ### What warranty does the LONGi Solar LR7-72HTH Hi-MO X6 Explorer series carry? The LR7-72HTH series comes with a 15-year product warranty covering manufacturing defects and materials, plus a 25-year linear power warranty. After 25 years of operation, LONGi guarantees a minimum of 87.4% of the rated power output. As a Tier 1 manufacturer with strong financial standing, LONGi's long-term warranty commitments carry real credibility — especially important for C&I projects with extended payback horizons. ### Is the LONGi Solar LR7-72HTH 605-615M Hi-MO X6 Explorer series still available for purchase? The LR7-72HTH 605-615M (Hi-MO X6 Explorer) series has been discontinued and is no longer in active production at LONGi. Purchase is only possible from remaining distributor stock, and availability is limited. For new projects, currently manufactured series such as the Hi-MO X6 Max or LONGi's newer lineups offer comparable or improved specifications and are available through regular distribution channels. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/lr-7-72-hth-605-615-m-30-30-and-15-frame-explorer-20240511-v-144a63453d5a.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +45 W, +2.8 pp, +5 yr warranty | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +40 W, +2.6 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | -45 W, +2.4 pp, +5 yr warranty | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +35 W, +2.4 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | -50 W, +2.2 pp, +5 yr warranty | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +30 W, +2.2 pp, +5 yr warranty | | [Longi Solar LR8-66HGD-595M](https://comparepv.com/panel/longi-lr8-66hgd-595m) | 595 W | Heavier, -0.4 pp, +5 yr warranty | | [Longi Solar LR7-72HGD-600M](https://comparepv.com/panel/longi-lr7-72hgd-600m) | 600 W | Heavier, +5 yr warranty | | [Longi Solar 600M](https://comparepv.com/panel/longi-600m) | 600 W | Heavier | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +75 W, +2.8 pp, +5 yr warranty | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +70 W, +2.6 pp, +5 yr warranty | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +95 W, heavier, +2.6 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +90 W, heavier, +2.5 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +65 W, +2.4 pp, +5 yr warranty | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +65 W, +2.4 pp, +5 yr warranty | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +65 W, +2.4 pp, +5 yr warranty | --- Source: https://comparepv.com/panel/longi-lr7-72hth-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 and alternatives filtered by how closely they match these dimensions.