--- title: "JA Solar JAM54S40-460/LR 460W Solar Panel - Specs & Review | ComparePV" description: "JA Solar JAM54S40-460/LR 460W solar panel. Specs: 23.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ja-solar-jam54s40-460-lr" updated: 2026-09-11 --- # JA Solar JAM54S40-460/LR Light for its output, no clear weak spot 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** JA Solar - **Model:** JAM54S40-460/LR - **Series:** JAM54S40 LR - **Rated power:** 460 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 450-500 W (1089 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 460 W | 465 W | Typical | | | Module efficiency | 23.00% | 22.52% | Strong - top 22% | 1,919 | | Power density | 230.2 | 225.2 | Strong - top 20% | 1,876 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 20.0 kg | 24.0 kg | Strong - top 2% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.00% | 22.52% | Strong - top 22% | 1,919 | | Power density | 230.2 | 225.2 | Strong - top 20% | 1,876 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 43.5 | 52.2 | Strong - top 2% | 300 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **43.5 kg per kWp** - Top 2% of the TOPCon 450-500 W segment, against a median of 52.2. Ranked 300th in the whole database. - **230.2 watts per square metre** - Top 20% of the TOPCon 450-500 W segment, against a median of 225.2. - **23.00% module efficiency** - Top 22% of the TOPCon 450-500 W segment, against a median of 22.52%. - **Best for:** Residential, commercial and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 460 W - **Efficiency:** 23.00 % - **Voltage at Pmax (Vmp):** 33.17 V - **Current at Pmax (Imp):** 13.87 A - **Open-circuit voltage (Voc):** 39.70 V - **Short-circuit current (Isc):** 14.64 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 20.0 kg - **Area:** 2.00 m2 - **Power density:** 230.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 402 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1919 of 14005 | | Power density | 1876 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 300 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type TOPCon Cell Technology** - N-type TOPCon cells deliver a temperature coefficient of -0.29%/°C versus a typical -0.35%/°C for PERC, translating into measurably higher energy yield on hot days. Reduced LID and LeTID degradation ensures stable output throughout the module's full operational lifetime. - **Up to 23% Efficiency — Segment Leader** - Peak module efficiency of 23% places this series at the top of its peer group: on par with Risen RSM96-11-440-460BNDG (23%) and SunKean SKT440~460M12-96D4 (23.02%), and 1.84 percentage points above Zonergy ZPM MH3-72 (21.16%). On a 20 m² rooftop, the gap vs. Zonergy translates to approximately 370 Wp of additional installed capacity. - **30-Year Linear Power Warranty ≥87.4%** - JA Solar guarantees at least 87.4% of rated power output after 30 years, with an annual degradation rate of 0.4% post-year-one. This ranks among the stronger long-term power guarantees in the 54-cell N-type segment and directly supports favorable LCOE calculations for long-horizon investments. - **GFI (Gapless) Cell Technology** - GFI technology minimizes inter-cell gaps, maximizing the active cell area and improving module aesthetics. Combined with the 182 mm 54-cell format, this enables higher installed wattage per rooftop square meter compared to standard 60-cell PERC layouts. - **BNEF Tier-1 Manufacturer for 20+ Years** - JA Solar (founded 2005) consistently appears on BloombergNEF's Tier-1 bankable manufacturers list, reducing credit risk for non-recourse financed projects. A global service network including EU offices ensures warranty support availability across the full 30-year power guarantee period. ## Cons - **Monofacial Design Only** - The JAM54S40 LR series offers no bifacial gain. The competing Risen RSM96-11-440-460BNDG at the same power class (460 Wp) and efficiency (23%) is bifacial — in installations with light-colored ground surfaces or agri-PV setups, this can add 5–15% additional energy yield. For ground-mounted prosumer systems, a bifacial alternative in the same price bracket is worth evaluating. - **15-Year Product Warranty** - The standard 15-year workmanship and materials warranty falls short of premium manufacturers offering 25 years (e.g., REC Alpha, Panasonic EVERVOLT). In a typical prosumer installation with a 20–25-year investment horizon, any manufacturing defect arising after year 15 is not covered and remains the owner's liability. ## About this series JA Solar JAM54S40 LR series are modern monofacial modules in the 54-cell format, designed for rooftop installations where maximum yield from limited surface area is crucial. The application of **n-type TOPCon cells** helps maintain high efficiency in real-world conditions and minimizes losses due to natural degradation over time, translating to more predictable energy production for years. Against many competitive solutions, it stands out thanks to its **GFI (gapless) technology**, which supports better active cell surface utilization and aesthetics, particularly important for residential homes and multi-family buildings. This is an excellent proposition for investors seeking more power output from the same number of panels, while simultaneously expecting **stable performance on hot days** and during weaker sunshine periods. The JAM54S40 LR will prove suitable for homes, apartment communities, and small businesses - everywhere where long-term reliability and high efficiency without compromising structural compromises are a priority. ## Notable figures - Efficiency of 23.0% matches the \*\*TOPCon 450-500W\*\* median - At 230.2 W/m² power density, this panel generates 5.0 W/m² more per unit area than \*\*TOPCon 450-500W\*\* median (225.2 W/m²) - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 450-500W\*\* panels - At 20.0 kg, this panel is 4.0 kg lighter than \*\*TOPCon 450-500W\*\* median (24.0 kg) - easier handling during installation - In the top 14% for efficiency among all TOPCon panels ## Questions ### What warranty does the JA Solar JAM54S40 LR series come with, and what does it cover? The JAM54S40 LR series includes a 15-year product warranty covering workmanship, laminate, and frame, along with a 30-year linear power warranty. JA Solar guarantees the panel will retain at least 87.4% of its rated output after 30 years. As a Tier 1 manufacturer, JA Solar has the financial standing to honor these commitments throughout the full operational life of the system. ### What is TOPCon technology in the JAM54S40 LR series and what does it mean in real-world use? TOPCon (Tunnel Oxide Passivated Contact) is an n-type cell technology featuring a lower power temperature coefficient (approx. −0.29%/°C) and reduced light-induced degradation (LID) compared to standard PERC cells. In practice, the JAM54S40 LR generates more annual energy than a same-wattage PERC module and degrades more slowly over decades, which directly improves the overall return on investment. ### Do the JAM54S40 LR panels perform well during hot summer days? Yes. Thanks to n-type TOPCon technology, the temperature coefficient of power for this series is approximately −0.29%/°C, compared to around −0.35%/°C for typical PERC cells. On hot days when roof-mounted module temperatures exceed 60°C, this difference translates into measurably higher energy output. The JAM54S40 LR is therefore a better choice than older-generation modules for installations in warm climates. ### Is the JA Solar JAM54S40 LR suitable for a standard sloped roof on a single-family home? Yes, this series is specifically designed for sloped residential rooftops. The modules measure 1762 × 1134 × 30 mm and weigh approximately 21–22 kg, which is within the load limits of standard roof structures. They are compatible with conventional mid-clamp and end-clamp mounting hardware, and the compact 54-cell format makes it easier to optimize the number of panels across limited roof space. ### What is GFI technology in the JAM54S40 LR panels and does it affect roof aesthetics? GFI (Gapless Film Integration) eliminates visible gaps between solar cells, increasing the active cell area relative to the total module surface and giving the panel a uniform, clean appearance. For homeowners, this has a dual benefit: the module looks more consistent on the roof, and the denser cell packing contributes to a slightly higher energy yield per square meter of available roof space. ### Are the JAM54S40 LR panels monofacial or bifacial, and does it matter for a rooftop installation? The JAM54S40 LR series is monofacial, collecting light from one side only. For typical sloped roof installations with a tile or membrane surface, bifacial modules offer no practical advantage due to the absence of ground reflection. A monofacial module is simpler to install, more cost-effective, and fully sufficient for the vast majority of residential prosumer systems. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/e4fe503657ec1-ecd5f476239b.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +50 W, cooler, +2.0 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +35 W, cooler, +1.8 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +45 W, cooler, +1.7 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +30 W, cooler, +1.5 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +40 W, cooler, +1.5 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +40 W, cooler, +1.5 pp | | [JA Solar NS-420MH-108](https://comparepv.com/panel/ja-solar-ns-420mh-108) | 420 W | -40 W, heavier, -2.0 pp | | [JA Solar JAM54D41-430/LB](https://comparepv.com/panel/ja-solar-jam54d41-430-lb-1) | 430 W | -30 W, heavier, -1.5 pp | | [JA Solar JAM54S40-435/LR](https://comparepv.com/panel/ja-solar-jam54s40-435-lr) | 435 W | -25 W, -1.2 pp | | [JA Solar JAM54S40-440/LR](https://comparepv.com/panel/ja-solar-jam54s40-440-lr) | 440 W | -20 W, -1.0 pp | --- Source: https://comparepv.com/panel/ja-solar-jam54s40-460-lr Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.