--- title: "Longi Solar LR5-54HPH-405M 405W Solar Panel - Specs & Review | ComparePV" description: "Longi Solar LR5-54HPH-405M 405W solar panel. Specs: 20.70% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/longi-lr5-54hph-405m" updated: 2026-09-11 --- # Longi Solar LR5-54HPH-405M Strong in heat, no clear weak spot 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Longi Solar - **Model:** LR5-54HPH-405M - **Series:** Hi-MO 5m (G2) - **Rated power:** 405 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 400-450 W (954 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 405 W | 410 W | Typical | | | Module efficiency | 20.70% | 20.60% | Typical | 10,764 | | Power density | 207.4 | 206.2 | Typical | 10,626 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 24% | 8,778 | | Weight (kg) | 20.8 kg | 22.0 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% | 20.60% | Typical | 10,764 | | Power density | 207.4 | 206.2 | Typical | 10,626 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 24% | 8,778 | | Weight per kWp | 51.4 | 53.0 | Typical | 4,725 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Strengths - **-0.340 %/°C temperature coefficient** - Top 24% of the PERC 400-450 W segment, against a median of -0.350. - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 405 W - **Efficiency:** 20.70 % - **Voltage at Pmax (Vmp):** 31.00 V - **Current at Pmax (Imp):** 13.07 A - **Open-circuit voltage (Voc):** 37.00 V - **Short-circuit current (Isc):** 13.83 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:** 108 ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 20.8 kg - **Area:** 1.95 m2 - **Power density:** 207.4 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:** 332 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10764 of 14005 | | Power density | 10626 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 4725 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Low power degradation via gallium doping** - Gallium-doped PERC cells limit LID to below 1.5% in the first year, with only 0.4% annual degradation thereafter, translating to roughly 88% of nominal power retained after 25 years of operation. - **Tier-1 manufacturer with 25 years of track record** - Longi Solar has operated since 2000 and is classified as bankable Tier-1, easing project financing and increasing confidence in long-term warranty support compared to less established brands. - **Efficiency matching segment leaders in PERC** - Maximum efficiency of 21.9% ties the top comparable module, JA Solar DeepBlue 3.0 Pro (21.9%), and exceeds Vikram Solar PREXOS and Paradea (21.87%), despite relying on proven PERC rather than pricier N-type cells. - **Segmented ribbons via Smart Soldering** - Smart Soldering technology reduces mechanical stress on cells during thermal cycling, lowering the risk of microcracks and power loss over the module's operating life — relevant in climates with large seasonal temperature swings. - **Wide power range and aesthetic all-black variants** - 12 variants spanning 405-565 Wp, plus available all-black versions, allow the module to fit both small pitched residential roofs and larger C&I installations without aesthetic compromise. ## Cons - **Efficiency capped by PERC technology** - PERC-based modules top out at 21.9% efficiency, while Longi's newer generation (Hi-MO X10, HPBC 2.0) already reaches 23-24%+, and competing N-type TOPCon panels offer a better temperature coefficient and lower long-term degradation. - **25-year power warranty shorter than some peers** - The linear power warranty runs 25 years with a 12-year product warranty, whereas JA Solar DeepBlue 3.0 Pro offers up to 30 years of power warranty under the same 12-year product warranty term, making Longi's offer less competitive on long-term investment security. - **No bifacial variant available** - The series is offered only in monofacial form, ruling out the additional energy gain (typically 5-10%) that bifacial panels — available from some competitors in this power segment — deliver on ground-mount or high-albedo roof installations. ## About this series The Longi Solar Hi-MO 5m (G2) series was designed with rooftop installations in mind, where high energy yield, aesthetics, and hassle-free installation are equally important. These modules are based on **monocrystalline PERC solar cells doped with gallium**, effectively reducing light-induced degradation (LID) and helping maintain stable performance over the long term. In practice, this means less disappointment in subsequent seasons and more predictable savings. What stands out in this series is **Smart Soldering - segmented soldering tapes**, which better manages stresses in the cells and improves reliability during daily temperature fluctuations. Additionally, **optimized electrical parameters** simplify equipment selection-modules work well with popular inverters and MLPE devices (e.g., optimizers, string inverters). The Hi-MO 5m (G2) is a good choice for homes, micro-installations, and smaller C&I roofs, especially when a **compact format** and **aesthetic appearance (including all-black variants)** are important, while simultaneously expecting high performance in weaker morning, evening, and less-than-ideal light incidence angles. ## Notable figures - Efficiency of 20.7% matches the \*\*PERC 400-450W\*\* median - Power density of 207.4 W/m² matches the \*\*PERC 400-450W\*\* median - At -0.34%/°C, hot weather performance is typical for \*\*PERC 400-450W\*\* panels - 20.8 kg weight - 1.2 kg lighter than \*\*PERC 400-450W\*\* median (22.0 kg), reducing installation effort - Ranked #10764 out of 14005 panels for efficiency in the database ## Questions ### What is the warranty on Longi Solar Hi-MO 5m (G2) panels? Longi Solar provides a 12-year product warranty and a 25-year linear power output warranty for the Hi-MO 5m (G2) series. The power warranty guarantees that the panels retain a specified percentage of their rated output over the full 25-year period — a standard offering from a Tier 1 manufacturer of this caliber. Keep all warranty documents together with the installer invoice. ### Are Longi Hi-MO 5m (G2) panels suitable for a pitched residential roof? Yes, the Hi-MO 5m (G2) series was designed with rooftop installations in mind. The compact module format simplifies mounting on standard racking systems, and the all-black variant blends seamlessly with dark roof tiles. The 144 half-cut cell layout improves shading tolerance, which matters on roofs with chimneys, dormers, or other obstructions that cause partial shading. ### What is Smart Soldering technology in the Hi-MO 5m (G2) and why does it matter? Smart Soldering refers to the segmented soldering ribbons used in the Hi-MO 5m (G2) series. They distribute mechanical stress that builds up during daily thermal cycling — the module heating up and cooling down. This reduces the risk of microcracks in the cells, resulting in higher long-term reliability, especially in climates with wide temperature swings between seasons. ### What is the maximum power of the Longi Hi-MO 5m (G2) and is an all-black version available? The top power rating in the Hi-MO 5m (G2) series is 565 Wp. The series also includes all-black variants with a black frame and black backsheet, significantly improving the visual appearance of installations on dark roof coverings. Check with your local distributor for current availability of specific color variants, as lead times may differ. ### Why are Hi-MO 5m (G2) cells gallium-doped and how does it affect long-term degradation? Gallium doping in the PERC cells of the Hi-MO 5m (G2) series effectively suppresses LID (Light-Induced Degradation), a phenomenon that causes power loss in conventional boron-doped cells within the first weeks of operation. In practice, the panel stabilizes at its rated output faster and loses less energy over its entire service life, improving the overall LCOE of the installation. ### Are Longi Hi-MO 5m (G2) panels compatible with power optimizers and microinverters? Yes, the optimized electrical parameters of the Hi-MO 5m (G2) series make it straightforward to pair with MLPE devices such as power optimizers and microinverters from major manufacturers. The modules also work well with standard string inverters. Before purchasing, verify that your chosen inverter's MPPT voltage range matches the specifications listed in the datasheet for your specific wattage variant. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Hi-MO-5m-L-Gi-LE-PM-T-PMD-059-F116-LR-5-54-HPH-405-425-M-G2-1ffcd37fdaf9.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-455-MAH54Db](https://comparepv.com/panel/aiko-aiko-455-mah54db) | 455 W | +50 W, cooler, +2.6 pp | | [Longi Solar LR5-54HTH-455M](https://comparepv.com/panel/longi-lr5-54hth-455m) | 455 W | +50 W, cooler, +2.6 pp | | [Yingli YL455CF54 e/2](https://comparepv.com/panel/yingli-yl455cf54-e-2) | 455 W | +50 W, cooler, +2.6 pp | | [Einnova Solarline ESM-455T](https://comparepv.com/panel/einnova-solarline-esm-455t) | 455 W | +50 W, +2.6 pp, +5 yr warranty | | [SunEvo Solar SE5-54HBC-455W](https://comparepv.com/panel/sunevo-solar-se5-54hbc-455w) | 455 W | +50 W, cooler, +2.6 pp | | [Just Solar JST-EDMH-(445-465)W-TD (455W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-455w-class) | 455 W | +50 W, +2.6 pp, +5 yr warranty | | [Luxor Solar LX-455M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-455m-182r-96-gg) | 455 W | +50 W, cooler, +2.6 pp | | [Longi Solar LR5-54HIB-390M](https://comparepv.com/panel/longi-lr5-54hib-390m) | 390 W | -15 W, -0.7 pp | | [Longi Solar LR5-54HIB-395M](https://comparepv.com/panel/longi-lr5-54hib-395m) | 395 W | -10 W, -0.5 pp | | [Longi Solar LR5-54HPB-400M](https://comparepv.com/panel/longi-lr5-54hpb-400m) | 400 W | Very close match | | [Longi Solar LR5-54HPH-410M](https://comparepv.com/panel/longi-lr5-54hph-410m) | 410 W | +0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +105 W, cooler, +4.3 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +90 W, cooler, +4.1 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +100 W, cooler, +4.0 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +85 W, cooler, +3.8 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +95 W, cooler, +3.8 pp | --- Source: https://comparepv.com/panel/longi-lr5-54hph-405m Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.