--- title: "JA Solar JAM60D42-545/LB 545W Solar Panel - Specs & Review | ComparePV" description: "JA Solar JAM60D42-545/LB 545W solar panel. Specs: 23.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ja-solar-jam60d42-545-lb" updated: 2026-09-11 --- # JA Solar JAM60D42-545/LB Space saver, no clear weak spot 432 panels in the segment TOPCon 500-550 W ## Identity - **Manufacturer:** JA Solar - **Model:** JAM60D42-545/LB - **Series:** JAM60D42 LB - **Rated power:** 545 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 500-550 W (432 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 545 W | 510 W | Strong - top 2% | | | Module efficiency | 23.30% | 22.73% | Strong - top 13% | 1,017 | | Power density | 233.0 | 227.4 | Strong - top 12% | 1,112 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 28.8 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 | 23.30% | 22.73% | Strong - top 13% | 1,017 | | Power density | 233.0 | 227.4 | Strong - top 12% | 1,112 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 52.8 | 52.4 | Typical | 6,543 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **233.0 watts per square metre** - Top 12% of the TOPCon 500-550 W segment, against a median of 227.4. - **23.30% module efficiency** - Top 13% of the TOPCon 500-550 W segment, against a median of 22.73%. - **Best for:** Residential and commercial. ## Specification ### Electrical - **Rated power (Pmax):** 545 W - **Efficiency:** 23.30 % - **Voltage at Pmax (Vmp):** 37.46 V - **Current at Pmax (Imp):** 14.55 A - **Open-circuit voltage (Voc):** 44.53 V - **Short-circuit current (Isc):** 15.41 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 - **Bifacial:** yes ### Physical - **Length:** 2063 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 28.8 kg - **Area:** 2.34 m2 - **Power density:** 233.0 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 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:** 476 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1017 of 14005 | | Power density | 1112 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 6543 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Module efficiency 22.2–23.3% — clear peer advantage** - The JAM60D42 LB series achieves module efficiency of 22.2–23.3%, outperforming direct comparables by 1.0–2.2 pp: Waaree ARKA Series (21.17%), S-Energy SE65-72BGJ (21.1%), and Emmvee Pearl (21.1%). In practice, this translates to higher energy yield per unit roof area — critical for space-constrained rooftop projects. - **N-type TOPCon — lower degradation, better Tcoef** - N-type TOPCon cells degrade at 1% in year one and 0.4%/year thereafter, retaining ~87.4% of rated power after 30 years. By comparison, PERC cells typically suffer 2% first-year LID and 0.55%/year degradation, reaching ~84.8% after 25 years. The temperature coefficient of Pmax is −0.29%/°C, improving summer yield vs. PERC (typically −0.34%/°C). - **80% bifaciality ±5% — rear-side energy gain** - A bifaciality factor of 80% (±5%) means the rear surface produces up to 80% of the front-side power. With adequate ground albedo (white TPO membrane, gravel, snow), the system can gain 5–20% additional annual energy with no increase in footprint. The double-glass construction protects the rear surface from moisture ingress and PID-related degradation. - **BNEF Tier 1 manufacturer — bankability assured** - JA Solar has maintained BNEF Tier 1 status continuously and ranks among the world's largest PV manufacturers (production capacity exceeding 100 GW/year). Tier 1 status requires non-recourse financing by at least six independent banks — essential for bankability in C&I and utility-scale projects. The company has operated since 2005, confirming long-term operational stability. - **30-year linear power warranty** - The manufacturer guarantees power output for 30 years at a 0.4%/year degradation rate post year one, a standard for JA Solar's N-type TOPCon lineup. Peers using PERC technology (e.g., Waaree ARKA, Emmvee Pearl) typically offer 25-year power warranties, meaning this series provides five additional years of warranty coverage for the same installation. ## Cons - **Module weight 28.8 kg — higher roof load** - The double-glass construction raises module weight to 28.8 kg (dimensions 2063×1134×30 mm), while comparable glass/backsheet modules in the 520–545 Wp class typically weigh 22–25 kg. The 4–7 kg per-module difference may necessitate additional structural assessment or reinforced racking, particularly for residential rooftop installations on older buildings. - **12-year product warranty — below premium segment** - All six variants in the series carry a 12-year workmanship (product) warranty. Flagship TOPCon lines from premium-tier competitors (e.g., Jinko NEOstar, LONGi Hi-MO 7) offer 15–25 year product warranties. For installations planned over a 20+ year horizon, this gap may represent elevated service risk in long-term financial models. ## About this series The JA Solar JAM60D42 LB series is designed to maximize energy yield in real-world conditions, not just in laboratory tests. These **double-glass** and **bifacial** modules can utilize light arriving not only from the front but also from the rear (e.g., from a light-colored surface, facade, or roof reflections). In practice, this means higher energy production from the same installation area, which is crucial where every square meter counts. The key advantage of this series is the **N-type TOPCon cell technology**, which helps minimize degradation-related losses over time and improves performance under low-light conditions. Additionally, the applied **Anti-Glare** coating supports installation in glare-sensitive locations, such as near residential buildings. The JAM60D42 LB is ideal for residential rooftops, multi-family buildings, as well as commercial and industrial facilities - especially where you need stable power generation, robust construction, and a higher energy yield compared to standard mono modules. ## Notable figures - 23.3% module efficiency - 0.6pp better than the \*\*TOPCon 500-550W\*\* median of 22.7% - Power density of 233.0 W/m² packs 5.6 W/m² more into the same footprint vs \*\*TOPCon 500-550W\*\* median (227.4 W/m²) - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 500-550W\*\* panels - Weight of 28.8 kg is 1.8 kg above \*\*TOPCon 500-550W\*\* median (27.0 kg) - verify structural support - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof ## Questions ### What does N-Type TOPCon technology in the JA Solar JAM60D42 LB offer compared to PERC? The N-Type TOPCon cells in the JAM60D42 LB series eliminate a significant portion of the defects inherent to P-Type PERC, resulting in lower power degradation — approximately 0.4% per year after year one. The Pmax temperature coefficient of -0.29 %/°C means less power loss on hot days. Over the full 30-year system lifetime, this translates into measurably higher total energy yield compared to conventional PERC modules of the same nameplate wattage. ### How much more energy do the bifacial JAM60D42 LB panels produce compared to standard monofacial modules? The JAM60D42 LB modules feature a transparent rear glass that captures light reflected from the ground, roof surface, or facade. With a bifaciality factor of approximately 70%, JA Solar reports a bifacial gain of 5–25% depending on installation conditions. In real-world scenarios with good ground albedo — such as a white roofing membrane or light-colored gravel — the additional energy yield typically ranges from 8–15% above a comparable monofacial module's nameplate output. ### What warranty does the JA Solar JAM60D42 LB come with and what does it cover? JA Solar provides a 12-year product warranty covering defects in materials and workmanship, along with a 30-year linear power warranty. After 30 years, the module is guaranteed to retain at least 87.4% of its nominal power. As a BloombergNEF Tier 1 manufacturer, JA Solar has the financial standing to back these long-term commitments, making the warranty practically enforceable over the entire coverage period. ### How heavy is the JAM60D42 LB panel and is it suitable for a typical residential pitched roof? The JAM60D42 LB measures 2063 × 1134 × 30 mm and weighs approximately 28.8 kg — heavier than older single-glass modules primarily because of the double-glass construction. Most residential pitched roofs with standard timber or concrete structure can handle this load without issues. For older or non-standard buildings, a structural assessment by a qualified engineer is recommended before installation. ### Do JA Solar JAM60D42 LB panels perform well in winter and under overcast conditions? Yes, N-Type TOPCon technology delivers noticeably better low-light performance than PERC cells, improving output on overcast or hazy days. The low Pmax temperature coefficient (-0.29 %/°C) also means less power loss on cold, clear winter days — the module can even slightly exceed its nameplate output in those conditions. Together, these characteristics produce higher annual energy yield than the 545 Wp nameplate rating alone implies. ### Is the JAM60D42 LB suitable for installation near residential buildings, and how effective is the Anti-Glare coating? Yes, the JAM60D42 LB series includes an Anti-Glare front glass coating that diffuses specular reflections, making it suitable for installations near roads, airports, or residential neighborhoods where local regulations may restrict reflected glare. The modules are rated for system voltages up to 1500 V DC, ensuring broad compatibility with a wide range of string inverters and power optimizers available on the market. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/a32acfa4cf2fa85-4e9c9deb0b2f.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +1.7 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | -50 W, lighter, +1.5 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +1.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +1.4 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +1.3 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +1.2 pp | | [JA Solar JAM60D42-520/LB](https://comparepv.com/panel/ja-solar-jam60d42-520-lb-1) | 520 W | -25 W, -1.1 pp | | [JA Solar JAM60D42-525/LB](https://comparepv.com/panel/ja-solar-jam60d42-525-lb) | 525 W | -20 W, -0.9 pp | | [JA Solar JAM60D42-530/LB](https://comparepv.com/panel/ja-solar-jam60d42-530-lb-1) | 530 W | -15 W, -0.6 pp | | [JA Solar JAM60D42-535/LB](https://comparepv.com/panel/ja-solar-jam60d42-535-lb) | 535 W | -10 W, -0.4 pp | | [JA Solar JAM60D42-540/LB](https://comparepv.com/panel/ja-solar-jam60d42-540-lb-1) | 540 W | Very close match | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, lighter, +1.1 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | Cooler, lighter, +1.0 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | Cooler, lighter, +0.9 pp | | [Jinko Solar JKM540-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm540-54ql6-dv-f1-eu) | 540 W | Cooler, lighter, +0.8 pp | --- Source: https://comparepv.com/panel/ja-solar-jam60d42-545-lb 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.