--- title: "Longi Solar LR7-60HVHL-550M 550W Solar Panel - Specs & Review | ComparePV" description: "Longi Solar LR7-60HVHL-550M 550W solar panel. Specs: 24.40% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/longi-lr7-60hvhl-550m" updated: 2026-09-11 --- # Longi Solar LR7-60HVHL-550M Light for its output, no clear weak spot 275 panels in the segment Back Contact 450-650 W ## Identity - **Manufacturer:** Longi Solar - **Model:** LR7-60HVHL-550M - **Series:** Hi-MO X10 Guardian - **Rated power:** 550 W - **Cell technology:** Back Contact ## How it compares Compared against segment Back Contact 450-650 W (275 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 550 W | 490 W | Typical | | | Module efficiency | 24.40% | 23.55% | Strong - top 7% | 99 | | Power density | 243.7 | 235.2 | Strong - top 7% | 128 | | Temperature coefficient | -0.260 | -0.260 | Typical | 511 | | Weight (kg) | 16.3 kg | 23.8 kg | Strong - top 2% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 24.40% | 23.55% | Strong - top 7% | 99 | | Power density | 243.7 | 235.2 | Strong - top 7% | 128 | | Temperature coefficient | -0.260 | -0.260 | Typical | 511 | | Weight per kWp | 29.6 | 47.8 | Strong - top 2% | 132 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **29.6 kg per kWp** - Top 2% of the Back Contact 450-650 W segment, against a median of 47.8. Ranked 132nd in the whole database. - **24.40% module efficiency** - Top 7% of the Back Contact 450-650 W segment, against a median of 23.55%. Ranked 99th in the whole database. - **243.7 watts per square metre** - Top 7% of the Back Contact 450-650 W segment, against a median of 235.2. Ranked 128th in the whole database. - **Best for:** Residential, commercial 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:** Back Contact - **Cell count:** 120 ### Physical - **Length:** 1990 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 16.3 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 | 132 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Up to 24.8% efficiency - segment leader** - Peak efficiency of 24.8% clearly outperforms peer comparables (Exiom, Fellow Energy, Premier Energies - all around 21.7%), delivering higher energy yield per roof area and lower installation cost per Wp. - **HPBC 2.0 Back Contact technology** - Back Contact cells with no visible front busbars eliminate shading losses caused by busbars and give the module a uniform, premium black appearance, while also reducing hot-spot temperatures under partial shading conditions. - **Anti-Dust frame and Light Design construction** - The frameless side edge design prevents dust and water accumulation (avoiding the so-called 'mud stripe' effect), and the Light Design variant is up to roughly 30% lighter than standard modules, expanding installation options on load-limited roofs without extra structural reinforcement. - **30-year power warranty** - The 30-year linear power warranty exceeds the 25-year standard offered by many tier-1 manufacturers, extending the protected payback period for the system owner. - **Longi as a tier-1 bankable manufacturer** - Longi Solar, founded in 2000 and classified as tier-1 bankable, provides financial stability for warranty servicing throughout the full coverage period, which matters given the 30-year power commitment. ## Cons - **No bifacial variant in this configuration** - Unlike some peer comparables (e.g., Premier Energies with a dual-glass bifacial module), the analyzed Guardian variant is monofacial, forgoing the additional rear-side yield gain that bifacial modules can achieve on high-albedo surfaces or flat rooftops. ## About this series The Longi Solar Hi-MO X10 Guardian series represents a breakthrough in the photovoltaics sector, utilizing advanced Back Contact **HPBC 2.0** cell technology. These modules were designed to eliminate the most common operational problems, offering a unique **Anti-Dust design**, which, thanks to a special frame without a side edge, prevents the accumulation of dust and water. This solves the problem of so-called mud streaks, which in traditional panels lead to shading of the bottom cells and significant power losses over time. The Guardian variant also stands out with its **Light Design lightweight construction**, being approximately 30 percent lighter than standard modules, which makes it an ideal choice for roofs with limited structural load capacity. With efficiency reaching 24.8 percent, this series ensures **maximum energy yield** even in low sunlight conditions, and the lack of busbars on the front gives the installation a luxurious, black appearance. It distinguishes itself from the competition through intelligent shading management and increased resistance to the formation of hot-spot points. This is a solution dedicated to investors looking for maintenance-free systems with the highest aesthetics, which maintain full performance for decades without the need for frequent cleaning of the glass surface. ## Notable figures - 24.4% module efficiency - 1.9pp better than the \*\*Back Contact 550-600W\*\* median of 22.5% - 243.7 W/m² power density - 19.2 W/m² more than \*\*Back Contact 550-600W\*\* median (224.5 W/m²), more power per roof area - -0.26%/°C temperature coefficient (median: -0.29%/°C) - retains ~1% more power at high temperatures - 16.3 kg weight - 10.9 kg lighter than \*\*Back Contact 550-600W\*\* median (27.2 kg), reducing installation effort - #99 for efficiency, #511 for temperature performance out of 14005 panels ## Questions ### What is HPBC 2.0 technology in the LONGi Hi-MO X10 Guardian panels and what does it mean for the end user? HPBC 2.0 (Hybrid Passivation Back Contact) moves all electrical contacts to the rear of the cell, leaving the front surface entirely busbar-free. This maximizes light absorption and enables module efficiency up to 24.8%. In practice, the Hi-MO X10 Guardian reduces power losses by more than 70% and lowers hotspot temperatures by 28% compared to conventional modules, translating to higher annual energy yield and improved long-term reliability. ### Are LONGi Hi-MO X10 Guardian Light Design panels suitable for rooftops with limited load-bearing capacity? Yes. The Light Design variant weighs just 16.3 kg (approx. 7.2 kg/m²), making it roughly 30% lighter than standard single-glass modules. It is purpose-built for commercial and industrial rooftops, canopies, garages, and older structures where structural load limits restrict conventional modules. Maximum output reaches 560 Wp at 24.8% efficiency, so reduced weight does not come at the cost of performance. ### How does the Anti-Dust frame design in the Hi-MO X10 Guardian work and does it actually reduce cleaning frequency? The Anti-Dust frame eliminates the conventional raised side-edge lip, allowing rainwater to run off freely without leaving mud strips along the bottom edge. Those deposits in standard frames shade the lower cells and cause measurable power losses throughout the year. In climates with regular rainfall, owners can expect significantly less frequent or even unnecessary manual cleaning, making the Hi-MO X10 Guardian a genuinely low-maintenance solution. ### How do LONGi Hi-MO X10 Guardian panels perform in winter and at low temperatures? HPBC 2.0 cell technology delivers a low temperature coefficient of -0.26%/°C (Pmax). This means the module loses minimal power as cell temperature rises in summer and produces excellent output on cold, sunny winter days. Standard PERC or TOPCon modules typically carry a coefficient of around -0.35%/°C, a difference that adds up to a noticeable improvement in annual energy yield under Central European climate conditions. ### What warranty does LONGi Solar provide on the Hi-MO X10 Guardian series? LONGi offers a 15-year product warranty covering manufacturing defects and materials, plus a 30-year linear power warranty guaranteeing at least 88.85% of rated output at the end of year 30. LONGi is a Tier 1 bankable manufacturer, meaning warranty claims are supported by financial strength and backed through authorized distributors across Europe. The 30-year power guarantee ranks among the longest currently available in the PV module market. ### How does the LONGi Hi-MO X10 Guardian differ from standard monofacial TOPCon modules? The key difference is cell architecture. Back Contact technology relocates all electrical interconnections to the rear of the cell, eliminating front-side busbars entirely and maximizing the active light-absorbing area. As a result, the Hi-MO X10 Guardian achieves 24.8% module efficiency, while premium TOPCon modules typically reach 22-23%. The module is not bifacial, but the 0BB front design combined with the Anti-Dust or Light Design frame makes it purpose-built for rooftop installations demanding premium aesthetics and minimum structural load. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/LR_7_60_HVHL_535_560_W_EN_8582051c27-e72991292936.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | -40 W, heavier, +0.6 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +10 W, heavier, +0.4 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | -45 W, cooler, heavier | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Heavier, +0.2 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | -50 W, cooler, heavier | | [Longi Solar LR7-60HVHL-535M](https://comparepv.com/panel/longi-lr7-60hvhl-535m) | 535 W | -15 W, -0.7 pp | | [Longi Solar LR7-60HVH-540M](https://comparepv.com/panel/longi-lr7-60hvh-540m) | 540 W | -10 W, heavier, -0.5 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | Heavier | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | -10 W, heavier | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | -10 W, heavier | | [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-lr7-60hvhl-550m Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.