--- title: "Longi Solar LR5-54HTH-455M 455W Solar Panel - Specs & Review | ComparePV" description: "Longi Solar LR5-54HTH-455M 455W solar panel. Specs: 23.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/longi-lr5-54hth-455m" updated: 2026-09-11 --- # Longi Solar LR5-54HTH-455M Space saver, short guarantee 7,637 panels in the 355-555 W band, all technologies ## Identity - **Manufacturer:** Longi Solar - **Model:** LR5-54HTH-455M - **Series:** Hi-MO X6 Scientist - **Rated power:** 455 W - **Cell technology:** Monocrystalline ## How it compares Compared against 355-555 W band, all technologies (7637 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 455 W | 450 W | Typical | | | Module efficiency | 23.30% | 21.35% | Strong - top 5% | 1,017 | | Power density | 233.0 | 213.2 | Strong - top 4% | 1,098 | | Temperature coefficient | -0.290 | -0.300 | Typical | 2,165 | | Weight (kg) | 20.8 kg | 23.8 kg | Strong - top 7% | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 17% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.30% | 21.35% | Strong - top 5% | 1,017 | | Power density | 233.0 | 213.2 | Strong - top 4% | 1,098 | | Temperature coefficient | -0.290 | -0.300 | Typical | 2,165 | | Weight per kWp | 45.7 | 52.6 | Strong - top 7% | 847 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 17% | 9,798 | ### Strengths - **233.0 watts per square metre** - Top 4% of the 355-555 W band, against a median of 213.2. Ranked 1,098th in the whole database. - **23.30% module efficiency** - Top 5% of the 355-555 W band, against a median of 21.35%. Ranked 1,017th in the whole database. - **45.7 kg per kWp** - Top 7% of the 355-555 W band, against a median of 52.6. Ranked 847th in the whole database. ### Watch out for - **25 year performance warranty** - Bottom 17% of the 355-555 W band, against a median of 30 yrs. - **Best for:** Residential and commercial. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 455 W - **Efficiency:** 23.30 % - **Voltage at Pmax (Vmp):** 33.84 V - **Current at Pmax (Imp):** 13.45 A - **Open-circuit voltage (Voc):** 40.13 V - **Short-circuit current (Isc):** 14.52 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/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 count:** 108 ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 20.8 kg - **Area:** 1.95 m2 - **Power density:** 233.0 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 88.9 % - **First-year degradation:** 1.50 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 395 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1017 of 14005 | | Power density | 1098 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 847 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Best-in-class efficiency** - Efficiency up to 23.3% outperforms all comparable modules in this power class - LEDVANCE M435~455N54LB-SF-F7 (22.77%), Sunlike SKT420~455M10-108D6 (22.8%), and Solitek SOLRIF D Black (22.56%). This is a real 0.5-0.7 percentage point lead over the nearest tier-1 competitors. - **No busbars - high power density** - Back Contact (HPBC) technology eliminates front-side metallization and busbars, and combined with the compact 1722×1134 mm (~1.95 m²) footprint delivers a power density of up to ~233 W/m² - a real advantage where roof area is limited in residential and commercial office installations. - **Full 25-year product warranty** - Unlike many tier-1 manufacturers offering a 10-15 year product warranty alongside a 25-year power warranty, Hi-MO X6 Scientist provides an identical, full 25-year coverage period for both product and power output - a rarity in the premium segment. - **Bankable manufacturer with long track record** - LONGi Solar has operated since 2000 and holds tier-1 bankable status, easing project financing through banks and leasing institutions and reducing long-term warranty-related risk. ## Cons - **No bifacial variant available** - The series is monofacial only, ruling out additional rear-side energy gain (typically 3-10% depending on ground albedo) available in some competing premium lines built on bifacial TOPCon or HJT cells. - **Limited field track record for HPBC** - Commercial rollout of Back Contact cells in this series began in 2023, meaning significantly less field deployment history than mature PERC or TOPCon technologies with over a decade of data - long-term real-world degradation behavior is less independently verified. ## About this series The Hi-MO X6 Scientist series represents a technological breakthrough, utilizing the innovative **HPBC (Hybrid Passivated Back Contact)** cell architecture. The key innovation is the complete elimination of front-side metallization, which allows for the full use of the cell surface for sunlight absorption. This solution effectively eliminates the problem of energy losses caused by traditional busbars, offering users **maximum conversion efficiency** that exceeds market standards. Models in this line are primarily dedicated to demanding residential installations and modern office buildings, where limited roof space requires the use of components with the highest power density. Thanks to their optimized structure, the panels guarantee **exceptional performance in low-light conditions**, which is crucial in the Polish climate. They are distinguished from the competition not only by their unique, aesthetic appearance without visible connections, but also by their **increased resistance to degradation** caused by atmospheric factors. By choosing Hi-MO X6 Scientist, investors receive a guarantee of stable power production for decades, while simultaneously minimizing system operating costs. This is currently one of the most advanced premium solutions, combining uncompromising science with **practical financial benefits** for the installation owner. ## Notable figures - 23.3% module efficiency - 1.5pp better than the \*\*database\*\* median of 21.8% - Power density of 233.0 W/m² packs 14.9 W/m² more into the same footprint vs \*\*database\*\* median (218.1 W/m²) - At -0.29%/°C, hot weather performance is typical for \*\*database\*\* panels - Weight of 20.8 kg (5.7 kg below \*\*database\*\* median of 26.5 kg) allows easier transport and roof mounting - In the top 7% for efficiency among all N-type panels ## Questions ### What is HPBC technology and how does it differ from standard PERC cells in the Hi-MO X6 Scientist? HPBC (Hybrid Passivated Back Contact) moves all cell metallization to the rear side, making the entire front surface available for light absorption. Eliminating front busbars raises cell efficiency beyond 25.8% and module efficiency up to 23.3% — well above the ~21–22% typical of PERC panels. The absence of front metallization also reduces micro-crack risk and gives the panel its distinctive all-black aesthetic. ### What warranty does the LONGi Hi-MO X6 Scientist come with and what does it cover? LONGi Solar backs the Hi-MO X6 Scientist with a 25-year product warranty covering material and manufacturing defects, plus a 25-year linear power warranty guaranteeing at least 87.4% of rated output after 25 years of operation. These are among the strongest warranty terms in the premium segment, providing solid investment security over the full system lifetime. ### Is the Hi-MO X6 Scientist 455 W panel compatible with a standard residential pitched roof? Yes. The LR5-54HTH model (455 Wp) measures 1722×1134×30 mm and weighs approximately 21.6 kg — dimensions fully compatible with standard residential mounting systems such as aluminum rails and roof hooks. The compact 54-cell format is easy to handle on pitched roofs and works well on complex roof layouts with dormers, chimneys, or limited usable area. ### How do Hi-MO X6 Scientist panels perform in overcast conditions and low-light environments? The back-contact HPBC architecture combined with a low temperature coefficient of just -0.29%/°C (better than the typical -0.35%/°C for PERC modules) enables the Hi-MO X6 Scientist to generate noticeably more energy under diffuse and low-irradiance conditions. This is a key advantage in climates with limited peak-sun hours, where a significant share of annual yield comes from overcast days. ### Is the Hi-MO X6 Scientist a bifacial panel, and should I choose it over cheaper bifacial alternatives? No — the Hi-MO X6 Scientist (455 Wp) is a monofacial module. It has no rear glass or transparent backsheet to collect reflected albedo light. On a standard rooftop (dark felt or roof tiles), the lack of bifaciality is not a drawback since albedo gain would be negligible anyway. Instead, you get industry-leading single-side module efficiency above 23%, a clean busbar-free appearance, and superior power density per square meter of roof space. ### How does the Hi-MO X6 Scientist compare to the Hi-MO X6 Explorer, and which one should I choose? The Hi-MO X6 Scientist uses HPBC+ cells delivering module efficiency up to 23.3%, while the Hi-MO X6 Explorer relies on standard HPBC cells at around 22.8%. The Scientist also offers higher power density, a cleaner appearance without visible front busbars, and a slightly better temperature coefficient. If your roof space is limited and maximizing energy output per square meter is the priority, the Scientist is the justified premium choice. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/L-Gi-LE-PM-T-PMD-059-F131-LR-5-54-HTH-445-455-M-30-30-and-15-9b262a3b7676.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +40 W, +1.5 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +50 W, +1.4 pp, +5 yr warranty | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +35 W, +1.2 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, +1.2 pp, +5 yr warranty | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +45 W, +1.2 pp, +5 yr warranty | | [Gokin GK-3-54HGb-500M](https://comparepv.com/panel/gokin-gk-3-54hgb-500m) | 500 W | +45 W, +1.2 pp, +5 yr warranty | | [Longi Solar LR5-54HIB-390M](https://comparepv.com/panel/longi-lr5-54hib-390m) | 390 W | -65 W, hotter, -3.3 pp | | [Longi Solar LR5-54HIB-395M](https://comparepv.com/panel/longi-lr5-54hib-395m) | 395 W | -60 W, hotter, -3.1 pp | | [Longi Solar LR5-54HPB-400M](https://comparepv.com/panel/longi-lr5-54hpb-400m) | 400 W | -55 W, hotter, -2.8 pp | | [Longi Solar LR5-54HPH-405M](https://comparepv.com/panel/longi-lr5-54hph-405m) | 405 W | -50 W, hotter, -2.6 pp | | [Longi Solar LR5-54HPH-410M](https://comparepv.com/panel/longi-lr5-54hph-410m) | 410 W | -45 W, hotter, -2.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +55 W, +1.7 pp, +5 yr warranty | --- Source: https://comparepv.com/panel/longi-lr5-54hth-455m 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.