--- title: "JA Solar JAM78D10-455/MB/1500V Solar Panel: Specs & Datasheet | ComparePV" description: "JA Solar JAM78D10-455/MB/1500V solar panel. Specs: 20.60% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam78d10-455-mb-1500v" image: "https://comparepv.com/og/panel/shanghai-ja-solar-technology-co-ltd-jam78d10-455-mb-1500v.png" updated: 2026-09-11 --- # JA Solar JAM78D10-455/MB/1500V Warranty pick, heavy for its output 452 panels in the segment PERC 450-500 W ## Identity - **Manufacturer:** JA Solar - **Model:** JAM78D10-455/MB/1500V - **Series:** JAM78D10 435-455/MB/1500V Series - **Rated power:** 455 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 450-500 W (452 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 455 W | 460 W | Typical | | | Module efficiency | 20.60% | 20.82% | Weak - bottom 24% | 11,172 | | Power density | 206.0 | 208.5 | Weak - bottom 23% | 11,186 | | Temperature coefficient | -0.354 | -0.350 | Weak - bottom 12% | 12,365 | | Weight (kg) | 29.0 kg | 24.5 kg | Weak - bottom 1% | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 20% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.60% | 20.82% | Weak - bottom 24% | 11,172 | | Power density | 206.0 | 208.5 | Weak - bottom 23% | 11,186 | | Temperature coefficient | -0.354 | -0.350 | Weak - bottom 12% | 12,365 | | Weight per kWp | 63.7 | 53.1 | Weak - bottom 1% | 13,023 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 20% | 21 | ### Strengths - **30 year performance warranty** - Top 20% of the PERC 450-500 W segment, against a median of 25 yrs. ### Watch out for - **63.7 kg per kWp** - Bottom 1% of the PERC 450-500 W segment, against a median of 53.1. Ranked 13,023rd in the whole database. - **-0.354 %/°C temperature coefficient** - Bottom 12% of the PERC 450-500 W segment, against a median of -0.350. - **206.0 watts per square metre** - Bottom 23% of the PERC 450-500 W segment, against a median of 208.5. - **Best for:** Commercial and shaded-installations. - **Not ideal for:** Weight-limited structures, hot climates and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 455 W - **Efficiency:** 20.60 % - **Voltage at Pmax (Vmp):** 45.60 V - **Current at Pmax (Imp):** 9.98 A - **Open-circuit voltage (Voc):** 53.85 V - **Short-circuit current (Isc):** 10.50 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:** 156 - **Bifacial:** yes ### Physical - **Length:** 2198 mm - **Width:** 1005 mm - **Thickness:** 35 mm - **Weight:** 29.0 kg - **Area:** 2.21 m2 - **Power density:** 206.0 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:** 378 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 11172 of 14129 | | Power density | 11186 of 14129 | | Temperature coefficient | 12365 of 14129 | | Weight | 13023 of 14129 | | Warranty | 21 of 14129 | ## Pros - **Double glass construction** - Dual glass eliminates the rear EVA backsheet, reducing moisture ingress to \<0.5 g/m²·d (IEC 61215), slowing degradation and improving mechanical protection - critical for industrial rooftop and utility-scale PV farms with long operational cycles. - **Bifacial half-cut with MBB** - Half-cut layout (156 cells vs. 78 in full-cell) reduces resistive losses by ~50%, while the 70%±10% bifaciality factor enables additional yield from reflected irradiance. Under optimal conditions (light-colored surface, adequate ground clearance), real-world energy gain can reach 10-20% over monofacial modules. - **1500V DC system compatibility** - A maximum system voltage of 1500V DC (IEC) allows strings of up to 28-30 modules per MPPT tracker, directly reducing BoS costs (cabling, combiner boxes, inverters) in utility-scale and large commercial PV projects. - **Tier-1 bankable manufacturer (BNEF)** - JA Solar (founded 2005) consistently appears on the Bloomberg NEF Tier-1 list and ranks in the global top-5 PV manufacturers. Bankable status ensures warranty enforceability and is a prerequisite for project finance acceptance by most lending institutions. - **30-year linear power warranty** - The manufacturer guarantees ≥83% of rated power after 30 years, implying annual degradation ≤0.55% - a competitive long-term commitment relevant to LCOE calculations in projects with extended investment horizons. ## Cons - **Discontinued series** - The JAM78D10 435-455/MB series went out of production circa 2022. Module availability is limited to distributor stock, and sourcing replacement units for long-term O&M may prove difficult or impossible over the project's full operational life. - **Efficiency below peer comparables** - Module efficiency of 19.7-20.6% (PERC) lags significantly behind comparable series: Sunlike Solar SKT420~455M10-108D6 reaches 22.8%, IBC Module Transparent LS-TA2 achieves 22.8%, and Waaree ARKA SERIES hits 20.93%. The 2+ percentage-point gap translates to approximately 10% more roof or land area required for equivalent installed capacity. - **Legacy PERC - weaker temperature coefficient** - PERC cells carry a Pmax temperature coefficient of approximately -0.35%/°C. Modern TOPCon modules achieve -0.30 to -0.31%/°C, yielding roughly 1.5-2% higher output on hot days (Tc=65°C). PERC also exhibits higher Light-Induced Degradation (LID) in the first year of operation compared to N-type technologies. - **12-year product warranty only** - The workmanship warranty covers only 12 years, whereas JA Solar's current Deep Blue 4.0 lineup and most 2023-2024 peer comparables offer 25-year product warranties. For projects with a 20-30 year operational horizon, this gap may negatively impact insurability and lender acceptance during project finance due diligence. ## About this series This series of JA Solar JAM78D10 435-455/MB/1500V modules is designed for installations where stable energy production in varying conditions and high mechanical strength are crucial. The application of **double glass construction** effectively minimizes the risk of accelerated degradation and better protects the cells against moisture and micro-cracking, which is essential for industrial roofs and PV farms. The modules feature **monocrystalline cells in a half-cut configuration**, enabling more efficient operation under partial shading and lower internal losses. An additional advantage is **compatibility with 1500V systems**, facilitating longer string designs and optimal BOS balance in large-scale installations. In practice, this series addresses common investor challenges: yield drops in hot weather, risk of transport damage, and requirements for long-term operation. It is an excellent choice for EPC contractors, solar farm developers, and companies prioritizing **predictable energy yields and module longevity** throughout the project lifecycle. ## Notable figures - Efficiency of 20.6% matches the \*\*PERC 450-500W\*\* median - Power density of 206.0 W/m² matches the \*\*PERC 450-500W\*\* median - At -0.35%/°C, hot weather performance is typical for \*\*PERC 450-500W\*\* panels - Weight of 29.0 kg is 4.5 kg above \*\*PERC 450-500W\*\* median (24.5 kg) - verify structural support - 70% bifaciality enables rear-side power generation, boosting yield by 4-10% on reflective surfaces ## Questions ### Is the JA Solar JAM78D10 435-455/MB/1500V series still available for purchase? The JAM78D10 435-455/MB/1500V series has been discontinued by JA Solar and is no longer in active production. Remaining stock may still be found through distributors, but for new projects it is advisable to check JA Solar's current lineup - the DeepBlue 3.0 and 4.0 series are the technological successors to this product line. ### What warranty does the JA Solar JAM78D10 435-455/MB/1500V carry? The modules come with a 12-year product warranty covering manufacturing defects and a 30-year linear power output warranty with an annual degradation rate not exceeding 0.5%. This means the module retains at least 84.8% of its rated power after 30 years of operation. The warranty is backed by JA Solar, a Bloomberg NEF Tier 1 manufacturer. ### What does the bifacial technology in the JAM78D10 435-455/MB series actually deliver, and is the premium worth it? The JAM78D10 modules are bifacial with a bifaciality factor of 70% ±10%, meaning the rear side captures light reflected from the ground surface. Depending on ground cover type (light gravel, sand, snow), energy yield can increase by 5-15% compared to a monofacial module. The gain is greatest in ground-mount installations with high-albedo surfaces. ### Why does the JAM78D10 435-455/MB series support a 1500V DC system, and what does that mean for a utility-scale PV farm? 1500V DC compatibility allows for longer strings compared to standard 1000V installations. For utility-scale PV farms this translates to fewer inverters, shorter DC cable runs, and significantly lower BoS (Balance of System) costs, reducing overall project LCOE. This is a key specification for developers working on systems exceeding 1 MWp. ### Does the double glass construction in the JAM78D10 435-455/MB panels actually improve long-term durability over a conventional backsheet? Yes. The double glass design replaces the rear backsheet with a second tempered glass pane, significantly reducing moisture ingress into the cells, lowering the risk of PID (Potential Induced Degradation), and minimizing microcracks caused during transport or under snow load. Glass-glass modules are especially recommended for industrial rooftops and utility-scale ground-mount farms where long service life is critical. ### What is the peak power output of the JA Solar JAM78D10 panels, and what cell technology do they use? The JAM78D10 435-455/MB/1500V series reaches a maximum power output of 455 Wp with module efficiency up to 21.0%. The modules are built on monocrystalline PERC cells in a half-cut configuration with MBB (Multi-Busbar) technology. The half-cut layout reduces resistive losses and improves performance under partial shading, while PERC enhances photon absorption compared to standard BSF cells. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/20201013025224274-f00e386e7423.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +4.2 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +4.1 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | +50 W, cooler, +4.1 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +3.9 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +3.9 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | Cooler, lighter, +3.9 pp | | [JA Solar JAM78D10-430/MB/1500V](https://comparepv.com/panel/ja-solar-shanghai-ja-solar-technology-co-ltd-jam78d10-430-mb-1500v) | 430 W | -25 W, -1.1 pp | | [JA Solar JAM78D10-435/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam78d10-435-mb-1500v) | 435 W | -20 W, -0.9 pp | | [JA Solar JAM78D10-440/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam78d10-440-mb-1500v) | 440 W | -15 W, -0.7 pp | | [JA Solar JAM78D10-445/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam78d10-445-mb-1500v) | 445 W | -10 W, -0.5 pp | | [JA Solar JAM78D10-450/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam78d10-450-mb-1500v) | 450 W | -0.2 pp | | [Horay Solar HS530TC-MHG-D](https://comparepv.com/panel/horay-solar-hs530tc-mhg-d) | 530 W | +75 W, cooler, +1.6 pp | | [Horay Solar HS525TC-MHG-D](https://comparepv.com/panel/horay-solar-hs525tc-mhg-d) | 525 W | +70 W, cooler, +1.4 pp | | [Huasun HSN-210R-B108DNV500](https://comparepv.com/panel/huasun-hsn-210r-b108dnv500) | 500 W | +45 W, cooler, +1.2 pp | | [Horay Solar HS520TC-MHG-D](https://comparepv.com/panel/horay-solar-hs520tc-mhg-d) | 520 W | +65 W, cooler, +1.2 pp | | [Daxieworld DX500W-30M](https://comparepv.com/panel/daxieworld-dx500w-30m) | 500 W | Hotter, 21 kg lighter, +1.0 pp | --- Source: https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam78d10-455-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.