--- title: "Longi Solar LR5-72HBD-550M 550W Solar Panel - Specs & Review | ComparePV" description: "Longi Solar LR5-72HBD-550M 550W solar panel. Specs: 21.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/longi-lr5-72hbd-550m" updated: 2026-09-11 --- # Longi Solar LR5-72HBD-550M Middle of its segment, heavy for its output 7,481 panels in the 450-650 W band, all technologies ## Identity - **Manufacturer:** Longi Solar - **Model:** LR5-72HBD-550M - **Series:** Hi-MO 5 - **Rated power:** 550 W - **Cell technology:** Monocrystalline - **Bifacial:** yes ## How it compares Compared against 450-650 W band, all technologies (7481 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 550 W | 550 W | Typical | | | Module efficiency | 21.30% | 22.30% | Typical | 8,519 | | Power density | 212.9 | 223.0 | Typical | 8,497 | | Temperature coefficient | -0.340 | -0.292 | Weak - bottom 23% | 8,778 | | Weight (kg) | 31.8 kg | 28.5 kg | Weak - bottom 11% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.30% | 22.30% | Typical | 8,519 | | Power density | 212.9 | 223.0 | Typical | 8,497 | | Temperature coefficient | -0.340 | -0.292 | Weak - bottom 23% | 8,778 | | Weight per kWp | 57.8 | 52.7 | Weak - bottom 11% | 11,439 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **57.8 kg per kWp** - Bottom 11% of the 450-650 W band, against a median of 52.7. - **-0.340 %/°C temperature coefficient** - Bottom 23% of the 450-650 W band, against a median of -0.292. - **Best for:** Commercial, utility-scale and shaded-installations. - **Not ideal for:** Weight-limited structures and hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 550 W - **Efficiency:** 21.30 % - **Voltage at Pmax (Vmp):** 41.95 V - **Current at Pmax (Imp):** 13.12 A - **Open-circuit voltage (Voc):** 49.80 V - **Short-circuit current (Isc):** 13.99 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 count:** 144 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 31.8 kg - **Area:** 2.58 m2 - **Power density:** 212.9 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 85.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.45 % - **Output after 30 years:** 467 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 8519 of 14005 | | Power density | 8497 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 11439 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Gallium doping eliminates LID** - P-type gallium-doped wafers effectively eliminate light-induced degradation (LID), confirmed by the manufacturer's 98% first-year power warranty and a linear annual degradation of only 0.45% - translating to roughly 85% guaranteed power after 30 years. - **Dual-glass bifacial design, 5400 Pa rating** - Dual-glass bifacial construction delivers additional rear-side energy yield and withstands up to 5400 Pa frontside static load without a rear crossbeam, eliminating shading losses from mounting hardware. - **Half-cut PERC with 9BB Smart Soldering** - The half-cut cell architecture combined with 9-busbar smart soldering interconnect technology minimizes internal cell stress, reducing microcrack risk and improving performance under diffuse light and high-temperature conditions. - **Tier-1 bankable manufacturer since 2000** - Longi Solar has operated since 2000 and is classified as a Tier-1 bankable manufacturer, lowering counterparty risk for large-scale project financing - a meaningful advantage over less established brands in the same power segment, such as Exiom or Fellow Energy. ## Cons - **Discontinued - series retired from lineup** - Hi-MO 5 was manufactured from 2020 to 2023 and has been discontinued in favor of the newer Hi-MO 6, 7, 9 and X10 series. This limits availability of identical replacement modules for existing installations and can extend timelines for warranty or service claims. - **PERC technology trails newer N-type modules** - Longi's own series comparison states that newer N-type (TOPCon/HPBC) modules in the Hi-MO 6/7/9/X10 lines outperform Hi-MO 5 in efficiency, temperature coefficient, degradation and long-term durability - a real technological limitation for new investments. - **Efficiency on par with, not above, peer comparables** - The 21.7% maximum efficiency matches Exiom (EX540-560M) and Fellow Energy (FE72-18X) and is close to Premier Energies (21.67%), meaning the series does not stand out electrically against lower-cost competitors in the same 540-560 Wp power class. ## About this series Longi Solar Hi-MO 5 series panels are a breakthrough solution based on M10 standard silicon wafers, which set new efficiency limits in utility-scale installations and modern commercial systems. Thanks to the use of **gallium-doped technology**, these modules effectively eliminate the problem of light-induced degradation (LID), which directly translates into stable energy production and a longer lifespan for the entire power plant. Innovative **smart segmented soldering** allows for the minimization of internal stresses, which drastically reduces the risk of micro-cracks in the cell structure. This series solves the key problem of high Balance of System (BOS) costs - the optimal module size allows for maximum use of the mounting surface while reducing expenditures on cabling and support structures. The use of **PERC cells in a Half-Cut architecture** ensures that the panels exhibit excellent resistance to high temperatures and work more efficiently in diffused light conditions. Compared to the competition, Hi-MO 5 stands out with the precise matching of electrical parameters to the latest inverters, making them the **most cost-effective choice in terms of LCOE** for demanding investors. It is a solid foundation for projects where the priority is reliability and maximizing yields from every installed kilowatt of power in Polish solar conditions. ## Notable figures - At 21.3% efficiency, this panel is 0.5pp below the \*\*database\*\* median of 21.8% - 212.9 W/m² power density is 5.2 W/m² below \*\*database\*\* median (218.1 W/m²) - requires larger installation area - -0.34%/°C temperature coefficient - 0.04pp worse than \*\*database\*\* median (-0.30%/°C), expect higher hot weather losses - At 31.8 kg (5.3 kg above \*\*database\*\* median of 26.5 kg), requires checking roof load capacity - Bifacial design (70% factor) captures reflected light - adds 4-10% yield on ground-mount or white roof ## Questions ### What warranty does the Longi Solar Hi-MO 5 come with and what does it cover? LONGi provides a 12-year product warranty and a 30-year linear power output warranty on Hi-MO 5 modules. Annual degradation is capped at 0.45%, with a guaranteed output of at least 98% of rated power after year one. For a 560 Wp module, this means the panel should still produce over 430 Wp after three decades. LONGi's Tier 1 manufacturer status reduces the counterparty risk associated with long-term warranty claims. ### What is gallium doping in the Hi-MO 5 and why does it matter for long-term energy yield? Conventional boron-doped silicon cells suffer light-induced degradation (LID) — a power loss during the first hours of sunlight exposure. LONGi replaced boron with gallium in the Hi-MO 5 wafers, effectively eliminating LID. The practical result is that the module does not lose several percent of rated power in its first week of operation, giving the entire 30-year project lifecycle a higher production baseline. For utility-scale PV plants, this translates into a measurably higher cumulative energy yield. ### Is the Longi Hi-MO 5 a bifacial module and how much additional energy output can I realistically expect? Yes, the Hi-MO 5 is available in a bifacial dual-glass configuration. The rear side captures reflected irradiance (albedo) from the surface below the array. Real-world bifacial gain ranges from 5 to 20%, depending on ground albedo: white gravel, light-colored membranes, or snow-covered ground outperform dark roofing materials. For ground-mount systems with a reflective surface, bifacial gain meaningfully improves the LCOE compared with standard monofacial modules. ### Is a 560 Wp Hi-MO 5 panel compatible with popular string inverters available in Europe? Yes. Hi-MO 5 modules operate at approximately 13 A, which is intentionally matched to the MPPT input range of mainstream string inverters from SMA, Fronius, Huawei, and SolarEdge. The open-circuit voltage fits within the standard 1000 V and 1500 V DC input limits, so no non-standard electrical design is required. You should still verify the number of modules per string against the specific inverter's datasheet before finalizing the system design. ### How does the Hi-MO 5 M10 wafer format reduce Balance of System (BoS) costs in large installations? The M10 wafer format (182 mm) allows LONGi to fit 144 half-cut PERC cells into a single module measuring approximately 2256 × 1134 mm at up to 560 Wp. Fewer modules are needed per megawatt compared with older, smaller formats, which directly cuts BoS costs: shorter DC cable runs, fewer MC4 connectors, less racking hardware, and reduced installation labor. In commercial and utility-scale projects above 100 kWp, these BoS savings can offset a higher per-watt module price. ### Is the Longi Solar Hi-MO 5 series still available for purchase? The Hi-MO 5 series has been officially discontinued by LONGi Solar. It has been superseded by newer generations, including the Hi-MO 6 and Hi-MO X lines featuring HPDC technology and higher cell efficiencies. Some units may still be found in distributor stock in European markets, but supply continuity and active product support are no longer guaranteed. For new installations, it is advisable to consider a current equivalent from LONGi's active product portfolio. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Hi-MO-5-L-Gi-LE-PM-T-PMD-059-F135-LR-5-72-HBD-540-560-M-G2-a-1180e32c2bec.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +3.7 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +3.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +3.4 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +3.3 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +3.2 pp | | [Longi Solar RL530HM](https://comparepv.com/panel/longi-solar-rl530hm) | 530 W | Hotter, lighter, -5 yr warranty | | [Longi Solar RL535HM](https://comparepv.com/panel/longi-solar-rl535hm) | 535 W | Hotter, lighter, -5 yr warranty | | [Longi Solar LR5-72HBD-540M](https://comparepv.com/panel/longi-lr5-72hbd-540m) | 540 W | -10 W, -0.4 pp | | [Longi Solar RL540HM](https://comparepv.com/panel/longi-solar-rl540hm) | 540 W | Hotter, lighter, -5 yr warranty | | [Longi Solar LR5-72HPH-545M](https://comparepv.com/panel/longi-lr5-72hph-545m) | 545 W | Lighter, -5 yr warranty | | [Longi Solar RL545HM](https://comparepv.com/panel/longi-solar-rl545hm) | 545 W | Hotter, lighter, -5 yr warranty | | [Longi Solar RL550HM](https://comparepv.com/panel/longi-solar-rl550hm) | 550 W | Hotter, lighter, -5 yr warranty | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +100 W, cooler, +3.9 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +95 W, cooler, +3.7 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +90 W, cooler, +3.5 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +85 W, cooler, +3.3 pp | --- Source: https://comparepv.com/panel/longi-lr5-72hbd-550m Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.