--- title: "Longi Solar LR7-60HVH-550M 550W Solar Panel - Specs & Review | ComparePV" description: "Longi Solar LR7-60HVH-550M 550W solar panel. Specs: 24.40% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/longi-lr7-60hvh-550m" updated: 2026-09-11 --- # Longi Solar LR7-60HVH-550M Strong in heat, no clear weak spot 259 panels in the segment N-type 550-600 W ## Identity - **Manufacturer:** Longi Solar - **Model:** LR7-60HVH-550M - **Series:** Hi-MO X10 Scientist LR7-60HVH 535~560M - **Rated power:** 550 W - **Cell technology:** N-type ## How it compares Compared against segment N-type 550-600 W (259 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 550 W | 580 W | Weak - bottom 2% | | | Module efficiency | 24.40% | 22.45% | Strong - top 1% | 99 | | Power density | 243.7 | 224.5 | Strong - top 1% | 128 | | Temperature coefficient | -0.260 | -0.290 | Strong - top 1% | 511 | | Weight (kg) | 25.0 kg | 29.5 kg | Strong - top 10% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 24.40% | 22.45% | Strong - top 1% | 99 | | Power density | 243.7 | 224.5 | Strong - top 1% | 128 | | Temperature coefficient | -0.260 | -0.290 | Strong - top 1% | 511 | | Weight per kWp | 45.5 | 52.3 | Strong - top 10% | 725 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **-0.260 %/°C temperature coefficient** - Top 1% of the N-type 550-600 W segment, against a median of -0.290. Ranked 511th in the whole database. - **24.40% module efficiency** - Top 1% of the N-type 550-600 W segment, against a median of 22.45%. Ranked 99th in the whole database. - **243.7 watts per square metre** - Top 1% of the N-type 550-600 W segment, against a median of 224.5. Ranked 128th in the whole database. - **Best for:** Residential, commercial, utility-scale and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 550 W - **Efficiency:** 24.40 % - **Voltage at Pmax (Vmp):** 37.31 V - **Current at Pmax (Imp):** 14.74 A - **Open-circuit voltage (Voc):** 45.08 V - **Short-circuit current (Isc):** 15.45 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:** 120 ### Physical - **Length:** 1990 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 25.0 kg - **Area:** 2.26 m2 - **Power density:** 243.7 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:** 489 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 99 of 14005 | | Power density | 128 of 14005 | | Temperature coefficient | 511 of 14005 | | Weight | 725 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Efficiency clearly above segment average** - Module efficiency of 23.7-24.8% (HPBC 2.0 back contact technology, N-type TaiRay cells) is roughly 2-3 percentage points higher than comparable 560 Wp modules (Exiom, Fellow Energy, Premier Energies - all around 21.7%). That's about 14% more power from the same roof area. - **Low power temperature coefficient** - The Pmax temperature coefficient is -0.26%/°C, meaning less power loss at high operating temperatures than typical TOPCon modules (usually around -0.29 to -0.34%/°C). A real advantage in summer installations and on poorly ventilated pitched roofs. - **Clean front aesthetic with no visible busbars** - The back-contact design with zero-busbar (0BB) technology eliminates visible metallization grids on the front, giving a uniform, dark appearance - important for residential installations where roof or facade aesthetics matter. - **30-year linear power warranty and low degradation** - The linear power warranty covers a full 30 years, with degradation of ≤1% in the first year and ≤0.35%/year thereafter - better than the industry-typical 0.4-0.5%/year for PERC/TOPCon modules. - **Bankable Tier-1 manufacturer** - Longi Solar (founded in 2000) is a Tier-1 manufacturer per BNEF criteria, reducing counterparty risk over the 30-year power warranty horizon. ## Cons - **Shorter product warranty than market standard** - The product warranty is 15 years, while in 2026 most Tier-1 panels (including competing TOPCon lines) offer 25 years as standard. The gap between the 15-year product warranty and 30-year power warranty may raise customer questions. - **No bifacial variant available** - The series is mono-facial only (is\_bifacial: false), while some comparable 560 Wp modules (e.g., Premier Energies, dual-glass bifacial) offer additional albedo-driven yield - that option is not available here. - **Limited field track record for BC technology** - The HPBC 2.0-based series launched in 2024 - compared to mature PERC/TOPCon technologies, long-term field data is more limited, even though back-contact technology itself is no longer experimental. ## About this series The Longi Solar Hi-MO X10 Scientist LR7-60HVH 535~560M series is designed to maximize energy yield from every square meter - especially in locations with limited roof space or where high power in a compact format is essential. A key feature is the application of **back-contact (BC)** technology in the enhanced HPBC 2.0 architecture, which translates to better performance under strong sunlight and an attractive, uniform front appearance without visible busbars. The modules utilize **N-type cells**, which help minimize power losses over time and maintain high efficiency for an extended operational lifespan. An additional benefit is the **lower operating temperature**, crucial during summer months and on roofs with poor ventilation - more energy reaches the inverter instead of being converted into heat. This series is suitable for residential and commercial installations, as well as projects requiring **enhanced mechanical durability and flexible mounting methods** while ensuring high reliability. ## Notable figures - Efficiency of 24.4% is 1.9pp above the \*\*N-type 550-600W\*\* median (22.4%) - Power density of 243.7 W/m² packs 19.2 W/m² more into the same footprint vs \*\*N-type 550-600W\*\* median (224.5 W/m²) - At -0.26%/°C (vs median -0.29%/°C), loses ~1% less power in hot conditions - At 25.0 kg, this panel is 4.5 kg lighter than \*\*N-type 550-600W\*\* median (29.5 kg) - easier handling during installation - #99 for efficiency, #511 for temperature performance out of 14005 panels ## Questions ### What is HPBC 2.0 technology in the LONGi Hi-MO X10 Scientist panels and is it worth the premium? HPBC 2.0 (High-Performance Back Contact) relocates all electrical contacts to the rear of the module, leaving the entire front surface available for light absorption — no busbars blocking sunlight. This enables module efficiency up to 24.8%. For homeowners it means more energy from the same roof area and a clean, uniform appearance with no visible silver lines on the front glass. ### What warranties come with the LONGi Hi-MO X10 Scientist LR7-60HVH 535–560M? LONGi provides a 15-year product warranty covering materials and workmanship, plus a 30-year linear power warranty. After 30 years the module retains at least 88.85% of its rated output. Annual power degradation beyond year one is capped at 0.35% — among the lowest in the industry for mass-production back contact modules. ### How do the LONGi Hi-MO X10 Scientist panels perform in hot summer conditions? The power temperature coefficient is -0.26%/°C, lower than standard PERC modules (-0.34%/°C). This means less output loss during heat waves. On rooftops with limited airflow the difference can add up to several percentage points of extra energy over a summer season — a meaningful gain in Central European climates with increasingly hot summers. ### Are the LONGi Hi-MO X10 LR7-60HVH 560W panels suitable for a pitched roof with limited space? Yes — the Hi-MO X10 Scientist series is designed specifically for space-constrained installations. At 1990×1134×30 mm and approximately 25 kg, the module is compatible with standard pitched-roof racking systems. With up to 560 Wp and 24.8% efficiency it delivers one of the highest energy yields per square meter available in its class. ### How much does the LONGi Hi-MO X10 Scientist degrade over a 30-year lifespan? Per the datasheet, first-year degradation is no more than 1% and subsequent annual degradation is capped at 0.35%. At the end of year 30 the module still delivers at least 88.85% of nameplate power. This outperforms conventional PERC panels, which typically carry a linear degradation rate of 0.45–0.55% per year. ### Is the LONGi Hi-MO X10 Scientist LR7-60HVH a bifacial module? No — the Hi-MO X10 Scientist LR7-60HVH 535–560M is a monofacial module that collects energy from the front surface only. Rather than relying on bifacial gain, LONGi maximized front-side conversion using HPBC 2.0 back contact architecture and N-type cells. The installation does not require a reflective ground surface or additional rear clearance for reflected irradiance. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/lr-7-60-hvh-535-560-m-30-30-and-15-frame-scientist-bgv-01-20-8a6691b10721.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | -40 W, cooler, +0.6 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +10 W, +0.4 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | -45 W, cooler, +0.3 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +0.2 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | -50 W, cooler, lighter | | [Longi Solar LR7-60HVHL-535M](https://comparepv.com/panel/longi-lr7-60hvhl-535m) | 535 W | -15 W, lighter, -0.7 pp | | [Longi Solar LR7-60HVH-540M](https://comparepv.com/panel/longi-lr7-60hvh-540m) | 540 W | -10 W, -0.5 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | Very close match | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | -10 W, lighter | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | -10 W, lighter | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | Heavier | --- Source: https://comparepv.com/panel/longi-lr7-60hvh-550m 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.