--- title: "JA Solar JAT60S40-540/LR 540W Solar Panel - Specs & Review | ComparePV" description: "JA Solar JAT60S40-540/LR 540W solar panel. Specs: 24.40% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ja-solar-jat60s40-540-lr" updated: 2026-09-11 --- # JA Solar JAT60S40-540/LR Efficiency leader, no clear weak spot 140 panels in the segment N-type 500-550 W ## Identity - **Manufacturer:** JA Solar - **Model:** JAT60S40-540/LR - **Series:** JAT60S40 LR - **Rated power:** 540 W - **Cell technology:** N-type ## How it compares Compared against segment N-type 500-550 W (140 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 540 W | 520 W | Strong - top 9% | | | Module efficiency | 24.40% | 22.54% | Strong - top 3% | 99 | | Power density | 243.8 | 225.3 | Strong - top 3% | 127 | | Temperature coefficient | -0.260 | -0.290 | Strong - top 8% | 511 | | Weight (kg) | 23.5 kg | 26.2 kg | Strong - top 3% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 24.40% | 22.54% | Strong - top 3% | 99 | | Power density | 243.8 | 225.3 | Strong - top 3% | 127 | | Temperature coefficient | -0.260 | -0.290 | Strong - top 8% | 511 | | Weight per kWp | 43.5 | 50.0 | Strong - top 3% | 306 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **24.40% module efficiency** - Top 3% of the N-type 500-550 W segment, against a median of 22.54%. Ranked 99th in the whole database. - **243.8 watts per square metre** - Top 3% of the N-type 500-550 W segment, against a median of 225.3. Ranked 127th in the whole database. - **43.5 kg per kWp** - Top 3% of the N-type 500-550 W segment, against a median of 50.0. Ranked 306th in the whole database. - **Best for:** Residential, commercial, shaded-installations and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 540 W - **Efficiency:** 24.40 % - **Voltage at Pmax (Vmp):** 39.11 V - **Current at Pmax (Imp):** 13.81 A - **Open-circuit voltage (Voc):** 45.78 V - **Short-circuit current (Isc):** 15.02 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.260 %/degC - **Temperature coefficient of Voc:** -0.220 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** N-type - **Cell count:** 120 ### Physical - **Length:** 1953 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 23.5 kg - **Area:** 2.21 m2 - **Power density:** 243.8 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:** 480 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 99 of 14005 | | Power density | 127 of 14005 | | Temperature coefficient | 511 of 14005 | | Weight | 306 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type TOPCon with half-cut cells & multi-busbar** - N-type TOPCon cells deliver a temperature coefficient of -0.30%/°C and significantly lower LID compared to PERC technology. The half-cut cell design combined with multi-busbar architecture (DeepBlue) reduces micro-crack propagation and partial-shade losses, translating to higher real-world annual energy yield on rooftops with obstructions such as chimneys, antennas, or dormer edges. - **23–24.4% efficiency — top of peer group** - The 23–24.4% efficiency range places the JAT60S40 LR at the top of its peer group: DMEGC GHxxxM10T-B66HST reaches only 20.9%, and Horay Solar HS 199R-120 TC-D Delta only 23.1%. The only direct competitor reaching 24.4% is the Gokin GK-5-60HG, a product from a smaller manufacturer without Tier-1 status. - **30-year linear power warranty — ≥87.4% output** - JA Solar guarantees linear degradation no greater than 0.4%/year and at least 87.4% of nominal power output after 30 years of operation. This covers the full financial horizon of a typical residential or commercial PV investment, providing stable LCOE projections throughout the system's lifecycle. - **JA Solar — BNEF Tier-1, global top-5** - JA Solar is continuously listed on BloombergNEF's Tier-1 bankable manufacturer list (Q1 2026) and ranks among the five largest PV module manufacturers globally, exceeding 80 GW of annual production capacity. Tier-1 bankable status materially reduces credit and warranty risk in non-recourse project financing. - **7 variants across 510–540 Wp range** - Seven sub-variants spanning 510–540 Wp allow system designers to match modules to MPPT channel constraints and roof area limitations without energy yield compromises. Fine-grained power selection reduces string mismatch losses in complex array layouts. ## Cons - **15-year product warranty — below market standard** - The product warranty is limited to 15 years, whereas the current market standard for premium N-type modules is 25 years. JA Solar's own newer DeepBlue 4.0 Pro series already offers a 25-year product warranty. For commercially financed installations, the shorter warranty period can be a barrier in risk assessments by insurers and project finance lenders. ## About this series The JA Solar JAT60S40 LR series are modules engineered for maximum yield from the same rooftop surface - where every square meter counts, and investment profitability matters. What sets them apart is their **N-type cell architecture**, which performs better with typical operational losses and helps maintain stable energy production over the long term. Utilizing DeepBlue family solutions, such as **cut cells and multi-string construction**, minimizes the impact of micro-cracks and enhances performance under partial shading - effectively reducing unwanted yield losses, for instance, from chimneys, antennas, or window frame edges. This series also offers **high mechanical strength and secure connection integrity**, which is crucial for roofs exposed to wind, snow, and intense temperature cycles. It’s an excellent choice for both residential and commercial installations where **durable quality and reliable performance year after year** are expected, not just a good lab result. ## Notable figures - 24.4% module efficiency - 1.9pp better than the \*\*N-type 500-550W\*\* median of 22.5% - Power density of 243.8 W/m² packs 18.5 W/m² more into the same footprint vs \*\*N-type 500-550W\*\* median (225.3 W/m²) - Temperature coefficient of -0.26%/°C vs median -0.29%/°C means ~1% less power loss at 65°C - Weight of 23.5 kg (2.7 kg below \*\*N-type 500-550W\*\* median of 26.2 kg) allows easier transport and roof mounting - Ranked #99 out of 14005 panels for efficiency in the database ## Questions ### What warranty comes with JA Solar JAT60S40 LR panels? The JAT60S40 LR series carries a 15-year product warranty covering defects in materials and workmanship, plus a 30-year linear power output warranty. The 30-year performance guarantee is among the longest available in the market and effectively covers the full operational lifespan of a residential or commercial PV system, giving investors solid long-term protection. ### What does N-type cell technology in the JAT60S40 LR actually mean for the buyer? N-type cells have significantly lower susceptibility to light-induced degradation (LID) compared to conventional P-type PERC cells. In practice, this means less power loss in the first years of operation and a more stable output profile across the full 30-year power warranty period. For the system owner, it translates into more cumulative energy production, a better LCOE, and a shorter payback period. ### Will JAT60S40 LR panels handle partial shading from a chimney or roof antenna? Yes. The JAT60S40 LR series uses half-cut cells and a multi-busbar architecture from JA Solar's DeepBlue platform, which significantly reduces mismatch losses under partial shading. When a chimney, antenna, or dormer edge shadows part of a module, the remaining cells continue producing at full capacity instead of pulling down the entire string — a practical advantage for urban rooftops with complex shading patterns. ### What is the peak power of the JAT60S40 LR module and how many panels does a typical home installation require? The top variant in the JAT60S40 LR series reaches 540 Wp. A typical 10 kWp residential system requires around 19 modules at this power rating. The high per-panel wattage means fewer modules are needed for the same total system capacity, reducing costs on mounting hardware and cutting installation time — a clear advantage when roof space is limited. ### How well do JAT60S40 LR modules withstand harsh weather — heavy snow loads, strong wind, and temperature cycling? The JAT60S40 LR series is engineered for high mechanical resilience suitable for installations exposed to snow loads, wind pressure, and intense temperature cycling. The multi-busbar cell design reduces micro-crack propagation under thermal stress, while sealed junction boxes and an anodized aluminum frame protect against moisture ingress. These characteristics make it a reliable choice for mountain, coastal, or high-variability climate zones. ### Is JA Solar a reliable manufacturer and is the JAT60S40 LR series still available? JA Solar is independently rated as a Tier 1 manufacturer, confirming bankability — lenders and insurers accept these modules without reservation for financed PV projects. The company is headquartered in China and ranks among the top global PV producers by volume and quality control standards. The JAT60S40 LR series is currently in active production and available through distribution channels. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/9ff6a889828d4-e369338ed902.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | -30 W, cooler, +0.6 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | -45 W, lighter, +0.4 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +20 W, heavier, +0.4 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | -35 W, cooler, +0.3 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +15 W, heavier, +0.2 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | -50 W, lighter | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | -40 W, cooler | | [JA Solar JAM60D41 485/LB](https://comparepv.com/panel/ja-solar-jam60d41-485-lb) | 485 W | -55 W, heavier, -2.5 pp | | [JA Solar JAM60D41 490/LB](https://comparepv.com/panel/ja-solar-jam60d41-490-lb) | 490 W | -50 W, heavier, -2.3 pp | | [JA Solar JAM60D41 495/LB](https://comparepv.com/panel/ja-solar-jam60d41-495-lb) | 495 W | -45 W, heavier, -2.0 pp | | [JA Solar JAM60S40-500/LR](https://comparepv.com/panel/ja-solar-jam60s40-500-lr) | 500 W | -40 W, hotter, -1.8 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +10 W, lighter | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | Very close match | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | Heavier | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | Heavier | --- Source: https://comparepv.com/panel/ja-solar-jat60s40-540-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.