--- title: "Longi Solar LR4-72HIH-450M 450W Solar Panel - Specs & Review | ComparePV" description: "Longi Solar LR4-72HIH-450M 450W solar panel. Specs: 20.70% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/longi-lr4-72hih-450m" updated: 2026-09-11 --- # Longi Solar LR4-72HIH-450M Strong in heat, no clear weak spot 449 panels in the segment PERC 450-500 W ## Identity - **Manufacturer:** Longi Solar - **Model:** LR4-72HIH-450M - **Series:** Hi-MO 4m (LR4-72HIH 445~465M) - **Rated power:** 450 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 450-500 W (449 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 450 W | 460 W | Weak - bottom 12% | | | Module efficiency | 20.70% | 20.82% | Typical | 10,764 | | Power density | 207.0 | 208.5 | Typical | 10,824 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 19% | 8,778 | | Weight (kg) | 24.3 kg | 24.5 kg | Typical | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.70% | 20.82% | Typical | 10,764 | | Power density | 207.0 | 208.5 | Typical | 10,824 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 19% | 8,778 | | Weight per kWp | 54.0 | 53.1 | Typical | 8,183 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Strengths - **-0.340 %/°C temperature coefficient** - Top 19% of the PERC 450-500 W segment, against a median of -0.350. - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 450 W - **Efficiency:** 20.70 % - **Voltage at Pmax (Vmp):** 41.50 V - **Current at Pmax (Imp):** 10.85 A - **Open-circuit voltage (Voc):** 49.30 V - **Short-circuit current (Isc):** 11.60 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.265 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 144 ### Physical - **Length:** 2094 mm - **Width:** 1038 mm - **Thickness:** 35 mm - **Weight:** 24.3 kg - **Area:** 2.17 m2 - **Power density:** 207.0 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.55 % - **Output after 30 years:** 369 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10764 of 14005 | | Power density | 10824 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 8183 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Tier-1 manufacturer with strong track record** - Longi Solar (founded in 2000) is consistently confirmed as a Tier-1 manufacturer by BloombergNEF, supporting bankability - easier project financing from banks and insurers. It is one of the world's largest producers of mono wafers and cells. - **Half-cut cells and multi busbar design** - Half-cut PERC cells combined with multi-busbar interconnection reduce resistive losses and improve mechanical resistance to microcracks during transport, snow load, and wind. In practice this improves yield under partial shading (chimneys, dormers, nearby trees). - **Solid efficiency for a PERC-generation module** - Efficiency of 20.5-21.4% sits in the upper range of PERC-technology performance for the 2021-2023 period, comparable to competing PERC/mono modules in the same 445-465 Wp power segment. - **PID resistance and reduced LID** - The design mitigates potential-induced degradation (PID) and limits the light-induced degradation (LID) effect, resulting in slower aging and more predictable energy output during the module's early years of operation. ## Cons - **Production discontinued (2023)** - The Hi-MO 4m LR4-72HIH series was manufactured from 2021 to 2023 and is no longer part of the manufacturer's current lineup. This limits availability of identical modules for system expansion and may complicate warranty service in the long run. - **Efficiency lags current segment leaders** - Peak efficiency of 21.4% trails comparable 465 Wp modules - Jinko JS182MHC120 (21.48%) and Vikram Solar SOMERA (21.51%) - while TOPCon technology (e.g., Luxor ECO LINE Glass-Glass, 23.6%) clearly surpasses the older PERC architecture. - **No bifacial technology** - The module is monofacial, whereas comparable competitor series (e.g., Luxor Solar TOPCon glass-glass bifacial) offer additional rear-side yield, particularly valuable on high-albedo surfaces or ground-mounted installations. ## About this series The Longi Solar Hi-MO 4m (LR4-72HIH 445~465M) series was designed for high energy yield from every square meter, especially in locations where installation power and stable performance under real-world conditions matter. The use of **monocrystalline PERC cells** and the **half-cut cell configuration** minimizes resistive losses and helps maintain output when part of the module is temporarily shaded - a practical advantage for rooftops near chimneys, windows, or installations close to trees. Furthermore, the construction with **multi-busbar interconnection** improves current conduction and enhances resistance to micro-cracking during transportation and operation in wind and snow. In daily operation, resistance to **PID** and limitation of the **LID** effect are also important, translating to slower degradation and more predictable yield over the coming years. This makes it an excellent choice for both residential and commercial installations, where reliable yield, aesthetic mounting, and guaranteed parameters over a long period are expected. ## Notable figures - At 20.7% efficiency, this panel is on par with typical \*\*PERC 450-500W\*\* modules - Power density of 207.0 W/m² matches the \*\*PERC 450-500W\*\* median - At -0.34%/°C, hot weather performance is typical for \*\*PERC 450-500W\*\* panels - In the top 77% for efficiency among all PERC panels ## Questions ### Is the Longi Solar Hi-MO 4m LR4-72HIH series still available for purchase? The Hi-MO 4m (LR4-72HIH 445–465M) series has been discontinued by Longi Solar. Panels may still be found as remaining distributor stock, but are no longer in production. If you need a currently manufactured Longi panel, consider newer series such as Hi-MO 6 or Hi-MO X6, which offer higher efficiency and updated warranty terms. ### What warranty does the Longi Solar Hi-MO 4m LR4-72HIH come with? Longi provided a 12-year product warranty covering manufacturing defects and a 25-year linear power warranty. According to the datasheet, the module should retain at least 84.8% of its rated power output after 25 years. Since the series is discontinued, verify with your distributor that the Longi warranty terms are still being honored before purchasing remaining stock. ### What are half-cut PERC cells and why do they matter in the Hi-MO 4m series? Half-cut technology splits each standard cell in two, reducing resistive losses and lowering operating temperatures. Combined with monocrystalline PERC architecture, the cells achieve higher conversion efficiency. The practical benefit is improved performance under partial shading — for example from a chimney or dormer — because a shaded section of the module has a smaller impact on the output of the entire string. ### What mechanical loads can the Longi Hi-MO 4m LR4-72HIH handle? According to the datasheet, the module is rated for snow loads up to 5400 Pa and wind loads up to 2400 Pa. The aluminum frame and 3.2 mm tempered glass provide solid resilience for climates with heavy snowfall and strong winds. The multi busbar design also reduces the risk of micro-cracks in cells during transport and under cyclical thermal stress. ### Does the Longi Hi-MO 4m 465W perform well on a roof with partial shading? It performs better than conventional full-cell modules thanks to the half-cut layout and multi busbar interconnection, which limit the impact of localized shading. That said, for roofs with significant shading issues, adding power optimizers or microinverters will provide a more complete solution by allowing each panel to operate independently of the rest of the array. ### What are the dimensions and weight of the Longi Solar Hi-MO 4m LR4-72HIH 465M panel? The module measures 2094 × 1038 × 35 mm and weighs approximately 24.3 kg. Its large 144-cell format means fewer modules are needed to reach your target system power, which can reduce racking and labor costs. Before installation, confirm your roof structure can support the load, especially on older timber-framed roofs. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/LR4-72HIH-445-465M-bcacf02f03ce.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, +4.1 pp, +5 yr warranty | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, +3.8 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +50 W, cooler, +3.8 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +50 W, cooler, +3.8 pp | | [Gokin GK-3-54HGb-500M](https://comparepv.com/panel/gokin-gk-3-54hgb-500m) | 500 W | +50 W, cooler, +3.8 pp | | [GCL GCL-NR10R/54BGDF](https://comparepv.com/panel/gcl-gcl-nr10r-54bgdf) | 500 W | +50 W, cooler, +3.8 pp | | [Longi Solar LR4-72HBD-440M](https://comparepv.com/panel/longi-lr4-72hbd-440m) | 440 W | Heavier, -0.5 pp, +5 yr warranty | | [Longi Solar LR4-72HIH-445M](https://comparepv.com/panel/longi-lr4-72hih-445m) | 445 W | Very close match | | [Longi Solar LR4-72HIH-455M](https://comparepv.com/panel/longi-lr4-72hih-455m) | 455 W | Very close match | | [Gamko New Energy GKA120N-PRO-590W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-590w) | 590 W | +140 W, +3.1 pp, +5 yr warranty | | [Gamko New Energy GKA120N-PRO-585W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-585w) | 585 W | +135 W, +2.9 pp, +5 yr warranty | | [Bisol BGO 580](https://comparepv.com/panel/bisol-bgo-580) | 580 W | +130 W, cooler, +2.8 pp | | [Gamko New Energy GKA120N-PRO-580W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-580w) | 580 W | +130 W, +2.7 pp, +5 yr warranty | --- Source: https://comparepv.com/panel/longi-lr4-72hih-450m Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.