--- title: "JA Solar JAM60S40-500/LR 500W Solar Panel - Specs & Review | ComparePV" description: "JA Solar JAM60S40-500/LR 500W solar panel. Specs: 22.60% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ja-solar-jam60s40-500-lr" updated: 2026-09-11 --- # JA Solar JAM60S40-500/LR Solid all-round for its segment 432 panels in the segment TOPCon 500-550 W ## Identity - **Manufacturer:** JA Solar - **Model:** JAM60S40-500/LR - **Series:** JAM60S40 LR - **Rated power:** 500 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 500-550 W (432 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 500 W | 510 W | Weak - bottom 10% | | | Module efficiency | 22.60% | 22.73% | Typical | 3,658 | | Power density | 225.8 | 227.4 | Typical | 3,835 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 24.3 kg | 27.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.60% | 22.73% | Typical | 3,658 | | Power density | 225.8 | 227.4 | Typical | 3,835 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 48.6 | 52.4 | Typical | 2,369 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 500 W - **Efficiency:** 22.60 % - **Voltage at Pmax (Vmp):** 36.91 V - **Current at Pmax (Imp):** 13.55 A - **Open-circuit voltage (Voc):** 43.85 V - **Short-circuit current (Isc):** 14.42 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:** 120 ### Physical - **Length:** 1953 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 24.3 kg - **Area:** 2.21 m2 - **Power density:** 225.8 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:** 437 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 3658 of 14005 | | Power density | 3835 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 2369 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Up to 23% efficiency – top of segment** - The 510 Wp variant reaches 23% efficiency, outperforming the comparable Trina Solar Vertex (21.2%) by 1.8 pp and virtually matching the Sunlike SKT (22.93%). Only the DMEGC INFINITY RT (23.1%) marginally surpasses this series at the same peak power. - **N-type TOPCon – low temperature coefficient and minimal LID** - The temperature coefficient is -0.29%/°C, meaning smaller output losses on hot days compared to typical PERC cells (-0.35%/°C). N-type technology virtually eliminates Light Induced Degradation (LID), which causes 1–3% power loss in P-type cells within the first months of operation. - **Half-cut + multi-busbar – stable output under partial shading** - Splitting cells in half reduces internal resistance and limits losses under partial shading – shading half the module does not shut down the entire string. The multi-busbar architecture improves current collection and increases resistance to microcracks, directly lowering field failure rates. - **30-year linear power warranty (>87.4%)** - The manufacturer guarantees at least 87.4% of nominal power after 30 years, with a first-year degradation cap of ≤1% and an annual degradation rate of ≤0.4%. This warranty horizon is 5 years longer than the typical 25-year commitment in the PERC segment, reducing investor risk in long-term LCOE calculations. - **JA Solar – BNEF Tier-1, Wood Mackenzie #1 in 2025** - JA Solar maintains BNEF Tier-1 bankable status (Q1 2026) and ranked #1 in the Wood Mackenzie Global Solar Module Manufacturer Ranking for H1 2025 with a score of 91.7/100 – the highest among all evaluated companies. This ensures genuine access to non-recourse project financing and minimizes guarantor insolvency risk over the 30-year warranty horizon. ## Cons - **Monofacial-only construction** - The JAM60S40 LR series is not bifacial (is\_bifacial: false) and therefore does not capture reflected irradiance from the surface beneath the module. On installations with highly reflective ground (gravel, snow, white roofing membrane), bifacial variants of equivalent peak power – such as the JA Solar JAM60D41/LB – can generate 5–25% more energy without any increase in mounting area. ## About this series The JA Solar JAM60S40 LR series was designed for maximum energy yield in real-world conditions - not just in the laboratory. The modules utilize **N-type TOPCon cells**, ensuring stable performance over time and being less susceptible to power degradation caused by common aging effects in the early years of operation. The construction based on **half-cut cells** minimizes resistive losses and helps maintain more stable performance under partial shading - which is particularly important for rooftops with chimneys, window wells, or installations near trees. In practice, the JAM60S40 LR addresses two key challenges for investors: how to extract more kWh from the same surface area and how to reduce the risk of losses in harsher weather conditions. Additionally, the **multi-busbar** architecture improves current collection from the cells and enhances resistance to micro-cracking, translating to higher reliability. This is an excellent choice for both residential and commercial installations, where **high yield in low-light conditions** and reliable performance over years are key factors. ## Notable figures - Efficiency of 22.6% matches the \*\*TOPCon 500-550W\*\* median - Power density of 225.8 W/m² matches the \*\*TOPCon 500-550W\*\* median - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 500-550W\*\* median - Weight of 24.3 kg (2.7 kg below \*\*TOPCon 500-550W\*\* median of 27.0 kg) allows easier transport and roof mounting - Ranked #3658 out of 14005 panels for efficiency in the database ## Questions ### What warranty does the JA Solar JAM60S40 LR come with? The JAM60S40 LR series carries a 15-year product warranty and a 30-year linear power warranty. After 30 years, the module is guaranteed to retain at least 87.4% of its nominal power output. This is one of the longest warranty standards available on the market, backed by JA Solar — a Bloomberg Tier 1 manufacturer. ### Is N-type TOPCon technology in the JAM60S40 LR genuinely better than older PERC modules, and is the price premium worth it? Yes. N-type TOPCon cells are significantly less susceptible to LID (Light Induced Degradation) than standard PERC cells, resulting in smaller power losses in the first months of operation. Higher conversion efficiency also means more energy harvested from the same roof area. For a residential installation this translates to a measurably higher annual kWh yield without having to expand the system size. ### Will JA Solar JAM60S40 LR panels perform well with partial roof shading from a chimney or dormers? Yes. The JAM60S40 LR modules use half-cut cells that split each cell into two independent halves. This means shading one section of the panel does not shut down the entire string, and power losses are far smaller than with conventional full-cell modules. This is a significant advantage on urban rooftops featuring chimneys, dormers, or nearby trees. ### How does the JAM60S40 LR perform on cloudy days and in low-irradiance conditions typical of Central European climates? N-type TOPCon modules inherently perform better in diffuse light than older P-type technologies. The multi-busbar architecture improves current collection across the entire cell surface, boosting output at low irradiance levels. In climates where overcast days dominate for much of the year, this characteristic has a measurable positive impact on annual energy production. ### Is the JA Solar JAM60S40 LR 510W a monofacial or bifacial panel? The JAM60S40 LR series is monofacial — it generates power from the front side only and does not collect reflected irradiance from the surface beneath it. The monofacial design is fully adequate for standard rooftop installations and requires no special substrate or specific tilt angle. It also integrates easily with conventional racking systems. ### What is the maximum wattage of the JAM60S40 LR series, and is choosing the 510 Wp variant worth it? The top variant in the series is 510 Wp. A higher per-module wattage means fewer panels are needed to reach the target system capacity, directly reducing installation labor costs and roof space requirements. For a typical residential system of 8–10 kWp, only 16–20 modules are needed, making it especially practical on rooftops with limited usable area. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/52c060fee9fcc74-93c214438bfe.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +10 W, cooler, +2.4 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +2.2 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, +2.1 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +1.9 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, +1.9 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | Cooler, lighter, +1.9 pp | | [JA Solar JAM60D41 485/LB](https://comparepv.com/panel/ja-solar-jam60d41-485-lb) | 485 W | -15 W, heavier, -0.7 pp | | [JA Solar JAM60D41 490/LB](https://comparepv.com/panel/ja-solar-jam60d41-490-lb) | 490 W | -10 W, heavier, -0.5 pp | | [JA Solar JAM60D41 495/LB](https://comparepv.com/panel/ja-solar-jam60d41-495-lb) | 495 W | Heavier, -0.2 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +60 W, cooler, +2.2 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +55 W, cooler, +2.0 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +50 W, lighter, +1.8 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +40 W, cooler, +1.8 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +40 W, cooler, +1.8 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +45 W, heavier, +1.7 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +45 W, cooler, +1.6 pp | --- Source: https://comparepv.com/panel/ja-solar-jam60s40-500-lr 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.