--- title: "JA Solar JAM72S30-585/LR Solar Panel: Specs & Datasheet | ComparePV" description: "JA Solar JAM72S30-585/LR solar panel. Specs: 22.10% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ja-solar-jam72s30-585-lr" image: "https://comparepv.com/og/panel/ja-solar-jam72s30-585-lr.png" updated: 2026-09-11 --- # JA Solar JAM72S30-585/LR Efficiency leader, short guarantee 589 panels in the segment PERC 550-600 W ## Identity - **Manufacturer:** JA Solar - **Model:** JAM72S30-585/LR - **Series:** JAM72S30 LR (p-type Monofacial Modules) - **Rated power:** 585 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 550-600 W (589 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 585 W | 560 W | Typical | | | Module efficiency | 22.10% | 21.29% | Strong - top 1% | 6,076 | | Power density | 221.1 | 212.9 | Strong - top 1% | 6,045 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,489 | | Weight (kg) | 28.0 kg | 30.8 kg | Strong - top 4% | | | Performance warranty | 25 yrs | 27 yrs | Weak - bottom 24% | 9,912 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.10% | 21.29% | Strong - top 1% | 6,076 | | Power density | 221.1 | 212.9 | Strong - top 1% | 6,045 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,489 | | Weight per kWp | 47.9 | 52.7 | Strong - top 4% | 1,938 | | Performance warranty | 25 yrs | 27 yrs | Weak - bottom 24% | 9,912 | ### Strengths - **22.10% module efficiency** - Top 1% of the PERC 550-600 W segment, against a median of 21.29%. Ranked 6,076th in the whole database. - **221.1 watts per square metre** - Top 1% of the PERC 550-600 W segment, against a median of 212.9. Ranked 6,045th in the whole database. - **47.9 kg per kWp** - Top 4% of the PERC 550-600 W segment, against a median of 52.7. Ranked 1,938th in the whole database. ### Watch out for - **25 year performance warranty** - Bottom 24% of the PERC 550-600 W segment, against a median of 27 yrs. - **Best for:** Commercial, utility-scale and shaded-installations. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 585 W - **Efficiency:** 22.10 % - **Voltage at Pmax (Vmp):** 42.42 V - **Current at Pmax (Imp):** 13.79 A - **Open-circuit voltage (Voc):** 51.22 V - **Short-circuit current (Isc):** 14.56 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.350 %/degC - **Temperature coefficient of Voc:** -0.275 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 144 ### Physical - **Length:** 2333 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 28.0 kg - **Area:** 2.65 m2 - **Power density:** 221.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.55 % - **Output after 30 years:** 480 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 6076 of 14129 | | Power density | 6045 of 14129 | | Temperature coefficient | 10489 of 14129 | | Weight | 1938 of 14129 | | Warranty | 9912 of 14129 | ## Pros - **BNEF Tier-1 manufacturer, 20+ years in market** - JA Solar has maintained a continuous presence on the BloombergNEF Tier-1 bankable module manufacturer list and operates with over 80 GWp of annual production capacity as of 2025. For bank-financed projects this eliminates the need for additional manufacturer due-diligence reviews by lenders or insurers. - **Half-cut cell + MultiBusBar architecture** - 144 half-cut, 182 mm cells combined with a MultiBusBar (MBB) contact grid reduce resistive losses and limit the impact of partial shading on string output. A single bypass diode failure blocks a smaller fraction of module power than in full-cell designs, improving MPPT tracking stability. - **Six power variants: 560-585 W** - Six power variants within a single series (560, 565, 570, 575, 580, 585 W) allow precise matching to an inverter's MPPT window without mixing series. This simplifies the electrical design and reduces BoS costs for systems from 100 kWp upward. - **Full certification suite + IP68 junction box** - The module carries IEC 61215, IEC 61730, UL 61215, UL 61730, ISO 9001, ISO 14001, and ISO 45001 certifications. The IP68-rated junction box satisfies lender and insurer requirements for both European and North American commercial project financing. - **1500 V DC system compatibility** - A 1500 V system voltage rating enables longer strings - more modules per MPPT input - reducing the number of inverter inputs, lowering DC cable runs, and cutting per-watt BoS costs. This advantage is most material on commercial and industrial rooftop systems above 500 kWp. ## Cons - **Lower efficiency than N-type peers** - Maximum module efficiency reaches 22.1%, while direct N-type competitors in the same power class achieve 22.6-22.65% (Hanersun HN18-72H, Q-SUN Qrystal N8, Risen RSM144-9). The ~0.5 percentage-point gap means roughly 4-6 additional modules per 1 MWp are required - or a lower peak power output on a fixed roof area. - **P-type PERC: higher LID degradation** - P-type PERC cells exhibit light-induced degradation (LID) of approximately 2% in the first year of operation, compared with ~1% for N-type TOPCon modules. In P90/P99 energy yield analyses required by project lenders, this difference reduces projected annual generation and can negatively affect the DSCR. - **No bifacial variant available** - The JAM72S30 LR series is strictly monofacial (glass-backsheet) with no bifacial option. Ground-mounted systems and flat roofs with light-colored membranes typically see 5-15% additional annual yield from rear-side albedo gain with bifacial modules, giving N-type bifacial alternatives a lower LCOE on eligible sites. ## About this series JA Solar JAM72S30 LR series are glass-backsheet monofacial modules based on **P-type Mono PERC cells**, designed for high energy yield in commercial and industrial installations. The application of **half-cell** architecture and MultiBusBar contact technology helps minimize resistive losses and maintain better performance when part of the module is intermittently shaded, translating to more stable string operation and predictable results. A key feature of this series is its project-cost-focused approach: more power per module means fewer panels, shorter installation time, and lower DC-side equipment costs. The modules also feature **enhanced mechanical durability**, facilitating selection for roofs of halls, warehouses, and large structures where reliable operation under wind and snow loads is essential. For installers, the **weatherproof IP68 junction box** and practical wiring harness are important, while for investors, the **long-term, linear power warranty** supports profitability over many years. ## Notable figures - At 22.1% efficiency, this panel is 0.8pp above typical \*\*PERC 550-600W\*\* modules (median: 21.3%) - 221.1 W/m² power density - 8.2 W/m² more than \*\*PERC 550-600W\*\* median (212.9 W/m²), more power per roof area - At -0.35%/°C, hot weather performance is typical for \*\*PERC 550-600W\*\* panels - Weight of 28.0 kg (2.8 kg below \*\*PERC 550-600W\*\* median of 30.8 kg) allows easier transport and roof mounting - Ranked #6076 out of 14129 panels for efficiency in the database ## Questions ### What is the maximum power output of the JA Solar JAM72S30 LR and what does it mean for project economics? The top-rated variant of the JAM72S30 LR series reaches 585 Wp. In practice, this means fewer panels are needed to achieve a given system capacity compared to older 500-540 Wp modules. Fewer panels translate to shorter installation time, lower racking costs, and reduced DC-side BoS expenses, which directly lowers the overall cost per kilowatt-peak of installed capacity. ### Is the JA Solar JAM72S30 LR suitable for commercial and industrial rooftops? Yes, the JAM72S30 LR series is designed primarily for commercial and industrial applications. The modules are rated for a front snow load of 5,400 Pa and a rear wind load of 2,400 Pa, making them suitable for large flat or low-slope rooftops on warehouses, logistics centers, and agricultural facilities where structural performance under wind and snow is critical. ### What warranty does the JA Solar JAM72S30 LR come with? JA Solar provides a 12-year product warranty covering manufacturing defects and material quality, along with a 25-year linear power warranty. The linear model means degradation is spread evenly over the entire period - after 25 years the module should retain at least 84.8% of its rated power. As a Tier 1 manufacturer, JA Solar offers strong backing for these warranty commitments. ### What is half-cut cell and MultiBusBar technology in the JAM72S30 LR, and does it actually improve energy yield? Half-cut technology splits each PERC cell in two, reducing operating current and resistive losses. Combined with MultiBusBar (MBB) contacts, current is collected across more connection points, shortening the electron path and reducing microfracture risk. The practical result is a higher annual energy yield and improved tolerance to partial shading of the module - a real benefit for rooftop installations with chimneys or neighboring obstacles. ### Is the JAM72S30 LR a bifacial or monofacial module, and how does that affect system design? The JAM72S30 LR is a monofacial glass-backsheet module, meaning it harvests energy from the front side only. This eliminates the need for high-albedo ground surfaces or elevated mounting heights required by bifacial modules. It works well on conventional rooftops and standard-tilt ground-mount systems, and the absence of a rear glass layer keeps weight lower and simplifies installation logistics. ### How do the JAM72S30 LR panels perform in high summer temperatures? The temperature coefficient of Pmax is approximately -0.35% per degree Celsius above 25°C STC. For reference, older polycrystalline modules typically rated -0.40% or worse. On a hot day when panel temperature exceeds 65°C, JAM72S30 LR modules lose less power than older technologies, which positively impacts annual energy yield in Central European climates. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/b98b5c9df209-7b2536a93ff0.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, +2.7 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, +2.5 pp, +5 yr warranty | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +50 W, cooler, +2.5 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | Cooler, +2.3 pp, +5 yr warranty | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, lighter, +2.3 pp | | [JA Solar JAM72D30-555/LB/1500V](https://comparepv.com/panel/ja-solar-jam72d30-555-lb-1500v) | 555 W | Heavier, -1.1 pp, +5 yr warranty | | [JA Solar JAM72D30-560/LB/1500V](https://comparepv.com/panel/ja-solar-jam72d30-560-lb-1500v) | 560 W | Heavier, -0.9 pp, +5 yr warranty | | [JA Solar JAM72D30-565/LB/1500V](https://comparepv.com/panel/ja-solar-jam72d30-565-lb-1500v) | 565 W | Heavier, -0.7 pp, +5 yr warranty | | [JA Solar JAM72D30-570/LB/1500V](https://comparepv.com/panel/ja-solar-jam72d30-570-lb-1500v) | 570 W | Heavier, -0.6 pp, +5 yr warranty | | [JA Solar JAM72D30-575/LB/1500V](https://comparepv.com/panel/ja-solar-jam72d30-575-lb-1500v) | 575 W | Heavier, -0.4 pp, +5 yr warranty | | [JA Solar JAM72D30-580/LB/1500V](https://comparepv.com/panel/ja-solar-jam72d30-580-lb-1500v) | 580 W | Heavier, -0.2 pp, +5 yr warranty | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +65 W, cooler, +3.1 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +95 W, cooler, +3.1 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +90 W, cooler, +2.9 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +60 W, cooler, +2.9 pp | | [WINAICO WST-675BKX72-A2](https://comparepv.com/panel/winaico-wst-675bkx72-a2) | 675 W | +90 W, cooler, +2.9 pp | --- Source: https://comparepv.com/panel/ja-solar-jam72s30-585-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.