--- title: "Longi Solar LR7-54HJD-495M 495W Solar Panel - Specs & Review | ComparePV" description: "Longi Solar LR7-54HJD-495M 495W solar panel. Specs: 24.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/longi-lr7-54hjd-495m" updated: 2026-09-11 --- # Longi Solar LR7-54HJD-495M Strong in heat, no clear weak spot 156 panels in the segment Back Contact 450-500 W ## Identity - **Manufacturer:** Longi Solar - **Model:** LR7-54HJD-495M - **Series:** EcoLife LR7-54HJD - **Rated power:** 495 W - **Cell technology:** Back Contact - **Bifacial:** yes ## How it compares Compared against segment Back Contact 450-500 W (156 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 495 W | 475 W | Strong - top 3% | | | Module efficiency | 24.30% | 23.50% | Strong - top 7% | 131 | | Power density | 242.5 | 235.2 | Strong - top 11% | 159 | | Temperature coefficient | -0.240 | -0.260 | Strong - top 1% | 13 | | Weight (kg) | 23.5 kg | 23.5 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 24.30% | 23.50% | Strong - top 7% | 131 | | Power density | 242.5 | 235.2 | Strong - top 11% | 159 | | Temperature coefficient | -0.240 | -0.260 | Strong - top 1% | 13 | | Weight per kWp | 47.5 | 48.0 | Typical | 1,708 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **-0.240 %/°C temperature coefficient** - Top 1% of the Back Contact 450-500 W segment, against a median of -0.260. Ranked 13th in the whole database. - **24.30% module efficiency** - Top 7% of the Back Contact 450-500 W segment, against a median of 23.50%. Ranked 131st in the whole database. - **242.5 watts per square metre** - Top 11% of the Back Contact 450-500 W segment, against a median of 235.2. - **Best for:** Residential, commercial and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 495 W - **Efficiency:** 24.30 % - **Voltage at Pmax (Vmp):** 34.07 V - **Current at Pmax (Imp):** 14.53 A - **Open-circuit voltage (Voc):** 41.25 V - **Short-circuit current (Isc):** 15.19 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.240 %/degC - **Temperature coefficient of Voc:** -0.210 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** Back Contact - **Cell count:** 108 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 1800 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 23.5 kg - **Area:** 2.04 m2 - **Power density:** 242.5 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 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:** 440 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 131 of 14005 | | Power density | 159 of 14005 | | Temperature coefficient | 13 of 14005 | | Weight | 1708 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Record module efficiency up to 25%** - Efficiency of 24.3-25% places the series clearly above its peer comparables - JA Solar JAM60S40 LR (23%), Sunlike SKT490-510M12 (22.93%), and Trina Vertex (21.2%) at the same 510 Wp max power. This translates into more energy yield per square meter of roof. - **HPBC 2.0 Back Contact technology** - The absence of front-side metallization busbars improves the aesthetic look of the installation and increases yield under diffuse light and partial shading conditions, as confirmed by the manufacturer's HPBC 2.0 technical material. - **30/30-year product and power warranty** - LONGi offers a symmetric 30-year product warranty and 30-year linear power warranty with 0.35%/year degradation, yielding approximately 87.4% of rated power after 30 years - longer than the typical 25/30-year terms offered by peer comparables. - **Low temperature coefficient of -0.26%/°C** - This value is about 0.03 percentage points better than typical TOPCon modules, meaning a smaller power drop on hot days and higher real-world summer output compared to peers with less favorable thermal performance. - **N-type cells with low LID degradation** - N-type wafers virtually eliminate light-induced degradation (LID) typical of older P-type/PERC cells, ensuring more stable energy yield during the first years of operation. ## Cons - **Limited bifaciality vs. TOPCon/HJT** - The Back Contact design, with metallization on the rear side of the cell, traditionally limits albedo gain compared to fully transparent bifacial TOPCon or HJT modules - a known technological trade-off of BC cells that may reduce the bifacial yield advantage versus peers in high-albedo installations. - **Short field track record** - The EcoLife LR7-54HJD series (Hi-MO X10 line) launched in 2025, so it lacks multi-year field data compared to more mature TOPCon technologies used by peer manufacturers for several years, making full verification of the claimed durability harder. ## About this series The Longi Solar EcoLife LR7-54HJD series represents a technological leap forward in the field of N-type modules, utilizing innovative cell architecture to maximize energy yields in real-world weather conditions. It solves the problem of limited performance on cloudy days by offering **outstanding efficiency in diffused light**, which in Polish latitudes translates to higher yields in autumn and winter. Thanks to high cell packing density, these panels allow for the optimal use of roofs with complex geometry, delivering more power from every square meter of the installation. What sets this series apart from the competition is its **above-average resistance to light-induced degradation** and time, which guarantees long-term financial stability for the investment. The product is dedicated especially to demanding home users and companies for whom **excellent thermal performance** is key, allowing high operating parameters to be maintained even on hot days. The EcoLife line focuses on ecology, offering a **reduced carbon footprint of the production process**, making it one of the most environmentally friendly solutions on the market. By choosing these modules, investors receive a guarantee of reliability based on advanced materials engineering, which sets new standards for durability in the photovoltaic sector. ## Notable figures - 24.3% module efficiency - 0.8pp better than the \*\*Back Contact 450-500W\*\* median of 23.5% - Power density of 242.5 W/m² packs 7.3 W/m² more into the same footprint vs \*\*Back Contact 450-500W\*\* median (235.2 W/m²) - -0.24%/°C temperature coefficient (median: -0.26%/°C) - retains ~1% more power at high temperatures - #131 for efficiency, #13 for temperature performance out of 14005 panels ## Questions ### What cell technology is used in the LONGi EcoLife LR7-54HJD panels, and why does it matter? The EcoLife LR7-54HJD is one of the few mass-produced modules combining heterojunction (HJT) cells with a Back Contact (BC) architecture, meaning all electrical contacts are hidden on the rear side of the cell. This combination achieves up to 25% module efficiency alongside an exceptionally low temperature coefficient of -0.24%/°C, so the panel loses far less output on hot summer days compared to standard PERC or TOPCon modules. ### Do LONGi EcoLife LR7-54HJD panels perform well in winter and on overcast days typical of Poland? Yes. The HJT+BC cell technology gives the EcoLife LR7-54HJD higher sensitivity to diffuse irradiance, which translates into better energy yields under overcast skies typical of Polish autumns and winters. The low temperature coefficient (-0.24%/°C) is a further advantage in cold but sunny conditions: on a frosty clear day, the module can momentarily exceed its nameplate power of 510 Wp. ### What does bifacial mean for the LR7-54HJD and what real-world gains can I expect in a residential installation? The LR7-54HJD is a bifacial dual-glass module — its rear glass allows reflected albedo light to reach the back side of the cells and generate additional power. In residential installations with a light-colored substrate such as a white roofing membrane or light facade, the additional energy yield is typically 5–15%. No special inverter is required, though maintaining an adequate air gap between the module and the roof surface optimizes bifacial performance. ### What warranty does the LONGi Solar EcoLife LR7-54HJD come with and what does it cover? LONGi Solar backs the EcoLife LR7-54HJD with a dual 30-year warranty: 30 years of product warranty covering material and manufacturing defects, and a 30-year linear power warranty. Annual degradation after the first year is capped at 0.35%, meaning the panel retains at least approximately 87.4% of its initial power output after three decades — one of the strongest warranties available in the residential module segment. ### Can the 510 Wp LR7-54HJD modules fit on a roof with dormers, chimneys, or an irregular layout? Yes. Despite its 510 Wp output, the panel measures only 1,800 × 1,134 × 30 mm and weighs 23.5 kg — a compact footprint for this power class. The high cell density of 108 HJT+BC cells maximizes power per square meter, making the series particularly well-suited for roofs with dormers, chimneys, or irregular geometry where every available surface area counts. ### How quickly do the LONGi EcoLife LR7-54HJD panels degrade over a 30-year service life? The EcoLife LR7-54HJD features exceptionally low degradation: no more than 1% in the first year and a maximum of 0.35% per year thereafter. For comparison, standard PERC modules typically degrade at 0.45–0.55%/year. Over a 30-year investment horizon, this difference can translate to several percentage points of additional energy production, directly improving the LCOE and overall return on investment. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Datasheet-EN-af2c76648972.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +15 W, +0.7 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Hotter, lighter, +0.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +10 W, +0.4 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Hotter, lighter | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Very close match | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | Hotter, lighter | | [Longi Solar LR7-54HGBB-440M](https://comparepv.com/panel/longi-lr7-54hgbb-440m) | 440 W | -55 W, hotter, -2.7 pp | | [Longi Solar LR7-54HGBB-445M](https://comparepv.com/panel/longi-lr7-54hgbb-445m) | 445 W | -50 W, hotter, -2.5 pp | | [Longi Solar LR7-54HGBB-450M](https://comparepv.com/panel/longi-lr7-54hgbb-450m) | 450 W | -45 W, hotter, -2.3 pp | | [Longi Solar LR7-54HTH-455M](https://comparepv.com/panel/longi-lr7-54hth-455m) | 455 W | Hotter, -2.0 pp, -5 yr warranty | | [Longi Solar LR7-54HTH-460M](https://comparepv.com/panel/longi-lr7-54hth-460m) | 460 W | Hotter, -1.8 pp, -5 yr warranty | | [Longi Solar LR7-54HTH-465M](https://comparepv.com/panel/longi-lr7-54hth-465m) | 465 W | Hotter, -1.5 pp, -5 yr warranty | --- Source: https://comparepv.com/panel/longi-lr7-54hjd-495m Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.