--- title: "JA Solar JAM60D10-320/MB/1500V Solar Panel: Specs & Datasheet | ComparePV" description: "JA Solar JAM60D10-320/MB/1500V solar panel. Specs: 18.60% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam60d10-320-mb-1500v" image: "https://comparepv.com/og/panel/shanghai-ja-solar-technology-co-ltd-jam60d10-320-mb-1500v.png" updated: 2026-09-11 --- # JA Solar JAM60D10-320/MB/1500V Warranty pick, heavy for its output 291 panels in the segment PERC 300-350 W ## Identity - **Manufacturer:** JA Solar - **Model:** JAM60D10-320/MB/1500V - **Series:** JAM60D10 320-345/MB/1500V Series - **Rated power:** 320 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 300-350 W (291 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 320 W | 325 W | Typical | | | Module efficiency | 18.60% | 19.00% | Typical | 13,181 | | Power density | 186.1 | 190.0 | Typical | 13,162 | | Temperature coefficient | -0.354 | -0.360 | Strong - top 17% | 12,365 | | Weight (kg) | 22.0 kg | 19.0 kg | Weak - bottom 22% | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 16% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 18.60% | 19.00% | Typical | 13,181 | | Power density | 186.1 | 190.0 | Typical | 13,162 | | Temperature coefficient | -0.354 | -0.360 | Strong - top 17% | 12,365 | | Weight per kWp | 68.8 | 60.3 | Weak - bottom 22% | 13,461 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 16% | 21 | ### Strengths - **30 year performance warranty** - Top 16% of the PERC 300-350 W segment, against a median of 25 yrs. - **-0.354 %/°C temperature coefficient** - Top 17% of the PERC 300-350 W segment, against a median of -0.360. ### Watch out for - **68.8 kg per kWp** - Bottom 22% of the PERC 300-350 W segment, against a median of 60.3. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 320 W - **Efficiency:** 18.60 % - **Voltage at Pmax (Vmp):** 34.27 V - **Current at Pmax (Imp):** 9.34 A - **Open-circuit voltage (Voc):** 40.55 V - **Short-circuit current (Isc):** 9.96 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.354 %/degC - **Temperature coefficient of Voc:** -0.272 %/degC - **Temperature coefficient of Isc:** 0.044 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 120 - **Bifacial:** yes ### Physical - **Length:** 1711 mm - **Width:** 1005 mm - **Thickness:** 30 mm - **Weight:** 22.0 kg - **Area:** 1.72 m2 - **Power density:** 186.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 83.0 % - **First-year degradation:** 2.50 % - **Annual degradation:** 0.50 % - **Output after 30 years:** 266 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 13181 of 14129 | | Power density | 13162 of 14129 | | Temperature coefficient | 12365 of 14129 | | Weight | 13461 of 14129 | | Warranty | 21 of 14129 | ## Pros - **Tier-1 manufacturer - full bankability** - JA Solar has maintained BNEF Tier-1 status for over a decade and ranks among the global top five module manufacturers (alongside LONGi, Jinko, Trina, and Tongwei) with production capacity exceeding 100 GWp. For bank- or lease-financed projects, this classification is a standard prerequisite that eliminates counterparty risk. - **Four technologies in a single module** - The series combines monocrystalline PERC cells, half-cut configuration, multi-busbar (MBB) technology, and bifacial double-glass construction - an advanced package for its 2019 launch date. Half-cut cells reduce resistive losses, MBB lowers sensitivity to microcracks, and bifacial design enables rear-side energy harvest (typically +5-15% depending on ground albedo). - **30-year linear power warranty** - JA Solar guarantees output performance for 30 years - five years beyond the 25-year standard common among mid-range competitors. The extended warranty horizon directly improves LCOE calculations for bank-financed projects and long-term PPA structures. - **1500 V DC system compatibility** - Compatibility with 1500 V system voltage allows longer string configurations, fewer inverters, and less DC cabling, reducing Balance of System (BoS) costs compared to legacy 1000 V designs. This is particularly relevant for commercial rooftop and small utility-scale installations. - **18.6% efficiency - above the segment's lower bound** - Among the peer comparables, the series outperforms the TPL Solar TPLM-72 Series (16.54%) by 2.06 percentage points, translating to meaningfully higher energy yield per unit of roof area. While not a top-tier efficiency figure, it is adequate for space-constrained residential and commercial PV systems. ## Cons - **Discontinued series (EOL 2022)** - The JAM60D10 series reached end-of-life in 2022 after only three years of production (2019-2022). Availability is limited to distributor stock, and long-term serviceability - including replacement frames, seals, and bypass diodes - is uncertain over a 25-30-year operational lifetime. This is a material risk for projects requiring long-term O&M planning. - **Efficiency below peer leaders** - At 18.6% conversion efficiency, the series trails two direct comparables: Sun Earth AGRI Mono Half Cell PV Module (19.55%) and JS Solar 60+ Series (19.67%) by 0.95-1.07 percentage points. On a 10 kWp system, this gap equates to roughly 0.5-0.6 m² more roof area required to deliver equivalent output - a relevant constraint on space-limited rooftops. - **12-year product warranty - below current standard** - The industry benchmark for Tier-1 modules has shifted toward 15-25-year product warranties (JA Solar's own DeepBlue 4.0 series carries a 15-year product warranty). A 12-year term means that from approximately 2034-2036 onward, buyers of newly installed units will have no manufacturer coverage for workmanship or material defects, even as the 30-year power warranty remains active. ## About this series JA Solar JAM60D10 320-345/MB/1500V series is designed for installations where reliable operation in real-world conditions is key - including partial shading and high temperatures. The application of **PERC monocrystalline cells** combined with **half-cell construction** minimizes module losses, improves performance under uneven irradiance, and reduces heating risks, translating to a more certain annual yield. Additionally, **Multi Busbar (MBB) technology** enhances current collection from the cells, increasing resistance to microcracks and maintaining parameters over a longer period. This is an excellent choice for installers and investors seeking modules for single-family homes, small businesses, and projects where compatibility with modern system architecture is crucial, thanks to the **adaptation to 1500V voltage**. Compared to competitors, the series stands out through a practical combination of durability, operational resilience, and predictable degradation over a long horizon, rather than promising "paper specifications." ## Notable figures - Efficiency of 18.6% is 0.8pp below the \*\*PERC 0-400W\*\* median (19.4%) - 186.1 W/m² power density is 8.1 W/m² below \*\*PERC 0-400W\*\* median (194.2 W/m²) - requires larger installation area - Temperature coefficient of -0.35%/°C matches the \*\*PERC 0-400W\*\* median - At 22.0 kg (1.5 kg above \*\*PERC 0-400W\*\* median of 20.5 kg), requires checking roof load capacity - Bifaciality factor of 70% can add 4-10% extra yield with reflective mounting surface ## Questions ### Is the JA Solar JAM60D10 320-345/MB/1500V series still available for purchase? The JAM60D10 320-345/MB/1500V series has been discontinued by JA Solar and is no longer actively distributed by most suppliers. Some dealers may still hold residual stock, but for new installations it is advisable to consider current JA Solar series with higher power output and ongoing manufacturer support. ### What warranty does the JA Solar JAM60D10 320-345/MB series come with? JA Solar provides a 12-year product warranty covering material and workmanship defects, along with a 30-year linear power warranty guaranteeing at least 80.7% of initial rated output after 30 years. These are standard Tier 1 manufacturer conditions, ensuring predictable long-term energy yield for residential and commercial investors. ### Does the bifacial design of the JAM60D10 MB series actually generate more electricity? Yes. Bifacial modules in the JAM60D10 MB series capture solar irradiance from both the front and the rear side, using light reflected off the ground or surrounding surfaces. Depending on surface albedo - light gravel, white roofing membrane - the rear-side energy gain ranges from 3 to 15% compared to a monofacial module of the same rated power, with the highest gains on elevated mounting structures over bright surfaces. ### How do half-cut cells and multi busbar technology affect shading performance of the JAM60D10 series? Half-cut cell design splits each cell in two, allowing the top and bottom halves of the module to operate semi-independently - shading on one section does not fully suppress output from the other. The multi busbar (MBB) layout adds extra current collection paths, reducing the impact of microcracks on power output. In practice, the module handles chimneys, antennas, and intermittent tree shadows better than conventional full-cell designs. ### Are JA Solar JAM60D10 320-345/MB panels compatible with 1500 V inverters? Yes, the series is rated for 1500 V DC systems, which allows longer strings with more modules in series. This reduces the number of parallel strings, lowers balance-of-system (BoS) cable costs, and ensures compatibility with modern string and central inverters designed for 1500 V architectures. Always verify the maximum DC input voltage of the specific inverter before configuring the string layout. ### How does the JAM60D10 320-345/MB series perform at high temperatures, for example on a dark roof in summer? The PERC cells combined with half-cut architecture deliver a power temperature coefficient of approximately -0.35%/°C. At a module operating temperature of 65°C, this translates to roughly a 17% power reduction relative to STC - slightly better than older standard-cell modules. On a pitched roof with adequate rear ventilation, real-world losses will be toward the lower end of that range. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/20200619043645894-64e455876e23.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-300MH-72](https://comparepv.com/panel/ja-solar-ns-300mh-72) | 300 W | Cooler, lighter, +4.7 pp | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | Cooler, lighter, +4.7 pp | | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | 280 W | Cooler, lighter, +4.7 pp | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Cooler, lighter, +4.5 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, lighter, +4.5 pp | | [Heckert Solar ZEUS 3.2 285WP FullBlack](https://comparepv.com/panel/heckert-solar-zeus-3-2-285wp-fullblack) | 285 W | Cooler, lighter, +4.5 pp | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | -35 W, lighter, +4.4 pp | | [Gamko New Energy GKA182M270W](https://comparepv.com/panel/gamko-new-energy-gka182m270w) | 270 W | -50 W, lighter, +4.4 pp | | [Gamko New Energy GKA182M300W](https://comparepv.com/panel/gamko-new-energy-gka182m300w) | 300 W | -20 W, lighter, +4.4 pp | | [JA Solar JAM60D10-325/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam60d10-325-mb-1500v) | 325 W | +0.3 pp | | [JA Solar JAM60D10-330/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam60d10-330-mb-1500v) | 330 W | +10 W, +0.6 pp | | [JA Solar JAM60D10-335/TB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam60d10-335-tb-1500v) | 335 W | +15 W, cooler, +0.9 pp | | [JA Solar JAM60D10-340/TB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam60d10-340-tb-1500v) | 340 W | +20 W, cooler, +1.2 pp | | [JA Solar JAM60D10-345/TB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam60d10-345-tb-1500v) | 345 W | +25 W, cooler, +1.5 pp | | [JA Solar JAM60D10-350/TB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam60d10-350-tb-1500v) | 350 W | +30 W, cooler, +1.8 pp | | [Jetion JT440SYK(B)](https://comparepv.com/panel/jetion-jt440syk-b) | 440 W | +120 W, cooler, +4.3 pp | --- Source: https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam60d10-320-mb-1500v Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.