--- title: "Longi Solar LR7-54HVH-475M 475W Solar Panel - Specs & Review | ComparePV" description: "Longi Solar LR7-54HVH-475M 475W solar panel. Specs: 23.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/longi-lr7-54hvh-475m" updated: 2026-09-11 --- # Longi Solar LR7-54HVH-475M Strong in heat, no clear weak spot 301 panels in the segment N-type 450-500 W ## Identity - **Manufacturer:** Longi Solar - **Model:** LR7-54HVH-475M - **Series:** Hi-MO X10 Explorer (LR7-54HVH 475~490M) - **Rated power:** 475 W - **Cell technology:** N-type ## How it compares Compared against segment N-type 450-500 W (301 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 475 W | 470 W | Typical | | | Module efficiency | 23.30% | 22.52% | Strong - top 15% | 1,017 | | Power density | 232.7 | 225.2 | Strong - top 19% | 1,189 | | Temperature coefficient | -0.260 | -0.290 | Strong - top 6% | 511 | | Weight (kg) | 21.6 kg | 23.7 kg | Strong - top 14% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.30% | 22.52% | Strong - top 15% | 1,017 | | Power density | 232.7 | 225.2 | Strong - top 19% | 1,189 | | Temperature coefficient | -0.260 | -0.290 | Strong - top 6% | 511 | | Weight per kWp | 45.5 | 49.5 | Strong - top 14% | 743 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **-0.260 %/°C temperature coefficient** - Top 6% of the N-type 450-500 W segment, against a median of -0.290. Ranked 511th in the whole database. - **45.5 kg per kWp** - Top 14% of the N-type 450-500 W segment, against a median of 49.5. - **23.30% module efficiency** - Top 15% of the N-type 450-500 W segment, against a median of 22.52%. - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 475 W - **Efficiency:** 23.30 % - **Voltage at Pmax (Vmp):** 33.16 V - **Current at Pmax (Imp):** 14.33 A - **Open-circuit voltage (Voc):** 40.18 V - **Short-circuit current (Isc):** 15.03 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.260 %/degC - **Temperature coefficient of Voc:** -0.200 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** N-type - **Cell count:** 108 ### Physical - **Length:** 1800 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 21.6 kg - **Area:** 2.04 m2 - **Power density:** 232.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 88.8 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.35 % - **Output after 30 years:** 422 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1017 of 14005 | | Power density | 1189 of 14005 | | Temperature coefficient | 511 of 14005 | | Weight | 743 of 14005 | | Warranty | 21 of 14005 | ## Pros - **HPBC 2.0 – certified shading resilience** - The HPBC 2.0 back-contact technology earned TÜV Rheinland's A+ anti-shading rating (June 2025). Independent testing showed hotspot temperatures approximately 77°C lower than TOPCon modules and up to 32.62% more power output under partial shading. - **Low power degradation over 30 years** - The module loses under 1% of power in year one, followed by just 0.35% per year through year 30 - yielding roughly 88.9% of rated power after 30 years, outperforming typical PERC modules that degrade around 0.55%/year. - **0BB design on N-type TaiRay wafer** - Eliminating conventional busbars reduces microcrack risk and resistive losses, while the N-type cells on TaiRay wafers help sustain higher efficiency retention over the long term compared with older P-type/PERC technology. - **Clean, uniform module front** - Moving electrical contacts to the cell's rear removes visible busbars from the front surface, giving the series an attractive appearance well suited to premium residential installations where roof aesthetics matter. - **Tier-1 bankable manufacturer** - Longi Solar has operated since 2000 and is classified as a Tier-1 (bankable) manufacturer, easing project financing and reducing risk perception for lenders and investors. ## Cons - **Efficiency below comparable models** - At the same 475 W max power rating, this series delivers 23.3% efficiency versus 23.8% for comparable modules from JA Solar (JAM54D40 LB), Astronergy (ASTRO N7s 2.0), and Sun Earth (TITAN Dual GLASS). This means a larger module footprint is needed for equivalent output, which cuts against the product's positioning for space-constrained rooftops. - **Shorter product warranty than a key competitor** - The 15-year product warranty is shorter than the 25 years offered by Astronergy ASTRO N7s 2.0, despite both products sharing an identical 30-year linear power warranty. - **No bifacial variant available** - The series lacks a bifacial option, limiting potential rear-side yield gains available with elevated racking or reflective commercial roofing - a feature offered in some comparable N-type modules. ## About this series The Longi Solar Hi-MO X10 Explorer (LR7-54HVH 475-490M) series is designed for maximum yield from limited rooftop space - especially where every square meter counts and aesthetics matter. The key advantage is **HPBC 2.0 back-contact technology**, which moves the cell connections to the rear side, enabling the front side to operate more efficiently and reliably under daily sunlight conditions. In practice, this means more energy harvested from the same space and more predictable system performance throughout the year. It also stands out from the competition with **resistance to partial shading and reduced hotspot risk** - crucial for applications near chimneys, window frames, antennas, or trees. The incorporated **TaiRay n-type wafers** help maintain high efficiency over the long term, while the **0BB construction** enhances connection reliability and supports module operation under heavy environmental stress. This makes it an excellent choice for demanding premium residential installations and small to medium-sized commercial rooftops, where yield, durability, and trouble-free operation are key priorities. ## Notable figures - Efficiency of 23.3% is 0.8pp above the \*\*N-type 450-500W\*\* median (22.5%) - Power density of 232.7 W/m² packs 7.5 W/m² more into the same footprint vs \*\*N-type 450-500W\*\* median (225.2 W/m²) - At -0.26%/°C (vs median -0.29%/°C), loses ~1% less power in hot conditions - At 21.6 kg, this panel is 2.1 kg lighter than \*\*N-type 450-500W\*\* median (23.7 kg) - easier handling during installation - Ranked #1017 out of 14005 panels for efficiency in the database ## Questions ### What is HPBC 2.0 technology in the LONGi Hi-MO X10 Explorer, and why does it matter? HPBC 2.0 (High-Performance Back Contact) relocates all electrical interconnects to the rear of the cell, leaving the front surface completely free of busbars. This maximizes the light-collecting area and improves thermal stability. As a result, the LR7-54HVH series reaches up to 24% module efficiency while limiting annual power degradation to just 0.35% from year two onward — a stronger result than most n-type TOPCon modules. ### Do the LONGi Hi-MO X10 Explorer panels perform well on roofs with chimneys, dormers, or partial shading? Yes. The n-type HPBC 2.0 cell design combined with a three-diode IP68 junction box limits power losses under partial shading and significantly reduces hot-spot risk compared to standard PERC modules. This makes the LR7-54HVH a strong choice for rooftops where chimneys, dormers, antennas, or nearby trees cast intermittent shadows across part of the array throughout the day. ### What are the dimensions and weight of the LONGi LR7-54HVH, and does it fit on a small residential roof? The module measures 1800×1134×30 mm and weighs 21.6 kg. The 108 half-cut cell layout (6×18) keeps the footprint compact relative to its 475–490 Wp output range. With up to 24% module efficiency, homeowners can generate more energy from a limited roof area compared to standard PERC panels of the same physical size — a key advantage on smaller residential rooftops. ### What warranty does LONGi offer on the Hi-MO X10 Explorer LR7-54HVH panels? LONGi provides a 15-year product warranty covering materials and workmanship, plus a 30-year linear power output warranty. First-year degradation is capped at under 1%, with a maximum of 0.35% per year from year two onward. After 30 years, the module retains approximately 87.4% of its rated output. Backed by LONGi's Tier 1 status, this is one of the most robust warranty packages available in the premium PV segment. ### How do the LONGi Hi-MO X10 Explorer panels handle high temperatures during summer? The temperature coefficient of Pmax is −0.260%/°C, noticeably better than typical PERC modules at around −0.35%/°C. The back-contact architecture also contributes to lower cell operating temperatures, reducing heat-related power losses on hot days. In practice, this translates to a higher annual energy yield in Polish and Central European climates, especially during peak summer production hours. ### Is the LONGi Hi-MO X10 Explorer LR7-54HVH a good choice for a residential rooftop prosumer installation? Yes. The compact 1800×1134 mm footprint and 21.6 kg weight make handling and mounting on standard roof structures straightforward, while up to 24% efficiency maximizes output from limited roof space. LONGi is a Tier 1 manufacturer, providing confidence in long-term warranty fulfillment and module bankability. The series suits both premium residential systems and small-to-medium commercial rooftop installations. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/lr-7-54-hvh-475-490-m-30-30-and-15-explorer-bgv-02-20241118-44c59d8f344d.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +35 W, cooler, +1.7 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +20 W, +1.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +30 W, cooler, +1.4 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +15 W, +1.2 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +25 W, cooler, +1.2 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +25 W, +1.2 pp | | [Longi Solar LR7-54HGBB-440M](https://comparepv.com/panel/longi-lr7-54hgbb-440m) | 440 W | -35 W, hotter, -1.7 pp | | [Longi Solar LR7-54HGBB-445M](https://comparepv.com/panel/longi-lr7-54hgbb-445m) | 445 W | -30 W, hotter, -1.5 pp | | [Longi Solar LR7-54HGBB-450M](https://comparepv.com/panel/longi-lr7-54hgbb-450m) | 450 W | -25 W, hotter, -1.3 pp | | [Longi Solar LR7-54HTH-455M](https://comparepv.com/panel/longi-lr7-54hth-455m) | 455 W | Hotter, -1.0 pp, -5 yr warranty | | [Longi Solar LR7-54HTH-460M](https://comparepv.com/panel/longi-lr7-54hth-460m) | 460 W | Hotter, -0.8 pp, -5 yr warranty | | [Longi Solar LR7-54HTH-465M](https://comparepv.com/panel/longi-lr7-54hth-465m) | 465 W | Hotter, -0.5 pp, -5 yr warranty | --- Source: https://comparepv.com/panel/longi-lr7-54hvh-475m 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.