--- title: "JA Solar JAM78D10-430/MB/1500V Solar Panel: Specs & Datasheet | ComparePV" description: "JA Solar JAM78D10-430/MB/1500V solar panel. Specs: 19.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ja-solar-shanghai-ja-solar-technology-co-ltd-jam78d10-430-mb-1500v" image: "https://comparepv.com/og/panel/ja-solar-shanghai-ja-solar-technology-co-ltd-jam78d10-430-mb-1500v.png" updated: 2026-09-11 --- # JA Solar JAM78D10-430/MB/1500V Warranty pick, heavy for its output 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** JA Solar - **Model:** JAM78D10-430/MB/1500V - **Series:** JAM78D10 430-450/MB/1500V Series - **Rated power:** 430 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 400-450 W (954 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 430 W | 410 W | Typical | | | Module efficiency | 19.50% | 20.60% | Weak - bottom 5% | 12,751 | | Power density | 194.7 | 206.2 | Weak - bottom 5% | 12,768 | | Temperature coefficient | -0.354 | -0.350 | Weak - bottom 20% | 12,365 | | Weight (kg) | 29.0 kg | 22.0 kg | Weak - bottom 1% | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 17% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 19.50% | 20.60% | Weak - bottom 5% | 12,751 | | Power density | 194.7 | 206.2 | Weak - bottom 5% | 12,768 | | Temperature coefficient | -0.354 | -0.350 | Weak - bottom 20% | 12,365 | | Weight per kWp | 67.4 | 53.0 | Weak - bottom 1% | 13,360 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 17% | 21 | ### Strengths - **30 year performance warranty** - Top 17% of the PERC 400-450 W segment, against a median of 25 yrs. ### Watch out for - **67.4 kg per kWp** - Bottom 1% of the PERC 400-450 W segment, against a median of 53.0. Ranked 13,360th in the whole database. - **19.50% module efficiency** - Bottom 5% of the PERC 400-450 W segment, against a median of 20.60%. Ranked 12,751st in the whole database. - **194.7 watts per square metre** - Bottom 5% of the PERC 400-450 W segment, against a median of 206.2. Ranked 12,768th in the whole database. - **Best for:** Commercial. - **Not ideal for:** Weight-limited structures, tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 430 W - **Efficiency:** 19.50 % - **Voltage at Pmax (Vmp):** 43.93 V - **Current at Pmax (Imp):** 9.79 A - **Open-circuit voltage (Voc):** 52.46 V - **Short-circuit current (Isc):** 10.28 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:** 194.7 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:** 357 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12751 of 14129 | | Power density | 12768 of 14129 | | Temperature coefficient | 12365 of 14129 | | Weight | 13360 of 14129 | | Warranty | 21 of 14129 | ## Pros - **Bifacial design - rear-side energy gain** - The module captures diffuse and reflected irradiance through its transparent rear glass. Bifacial gain in typical ground-mounted systems is 10-15%, rising to 25-30% on high-albedo surfaces (white gravel, snow), directly reducing LCOE without increasing the land footprint. - **1500 V system voltage - lower BoS costs** - 1500 V compatibility allows longer strings (more modules per MPPT input), reducing cable runs, connectors, and inverter count in utility-scale and large commercial rooftop systems. The result is a measurable reduction in Balance of System costs per installed kWp. - **JA Solar BNEF Tier-1 - bankable for over a decade** - JA Solar has maintained BNEF Tier-1 bankable status continuously, with manufacturing capacity exceeding 100 GWp/year and acceptance by major project finance lenders. Tier-1 status reduces financing risk when securing debt for utility-scale PV projects. - **30-year linear power warranty** - The manufacturer guarantees power output for 30 years, surpassing the typical 25-year industry standard offered by many mid-range competitors. The extended warranty horizon directly improves financial model predictability and LCOE calculations for commercial installations. ## Cons - **Discontinued series (end-of-life 2022)** - The JAM78D10 series was manufactured from 2020 to 2022 and has been officially discontinued. New module availability is limited to distributor warehouse stock, making warranty replacements and future system expansions with identical modules difficult to guarantee. - **19.5% efficiency - well below peer comparables** - At the same rated power of 430 Wp, peer comparable VSUN N-108MH-BW achieves 22.02% efficiency, SunLink SL5M108 reaches 22%, and Silfab Elite hits 21.4%. The 1.9-2.5 percentage-point gap means JAM78D10 requires approximately 9-12% more roof or land area to deliver the same installed capacity. - **PERC technology - older-generation cell architecture** - Mono PERC (P-type) cells exhibit Light-Induced Degradation (LID) of 1-3% within the first hours of light exposure and annual degradation of ~0.6-0.8% per PVEL 2025 data. N-type TOPCon modules, which already represent ~65% of global shipments as of Q1 2026, have no LID mechanism and degrade at 0.4-0.5%/year, delivering measurably higher lifetime energy yield. ## About this series The JA Solar JAM78D10 430-450/MB/1500V series is designed for installations where high energy yield on limited space and predictable performance over years are key priorities. These are **bifacial modules**, capable of harnessing not only direct radiation but also reflected light from the ground-particularly effective on light-colored roofs, ground-mounted structures, and projects where optimizing output beyond the panel's front side is planned. The architecture featuring **mono PERC cells** supports stable performance under typical operating conditions, while the **1500V concept** facilitates longer strings and reduces losses in larger systems. In practice, this series addresses a common challenge for investors: how to increase yield without adding more rows of panels. It is also distinguished by its focus on **long-term degradation** and operational durability, which is crucial for PV farms, large commercial roofs, and projects targeting a predictable LCOE. This makes the JAM78D10 a viable alternative to single-sided panels when you aim to squeeze more out of the same location. ## Notable figures - At 19.5% efficiency, this panel is 1.1pp below the \*\*PERC 400-450W\*\* median of 20.6% - At 194.7 W/m², this panel generates 11.5 W/m² less per unit area than \*\*PERC 400-450W\*\* median (206.2 W/m²) - Temperature coefficient of -0.35%/°C matches the \*\*PERC 400-450W\*\* median - Weight of 29.0 kg is 7.0 kg above \*\*PERC 400-450W\*\* median (22.0 kg) - verify structural support - Bifacial design (70% factor) captures reflected light - adds 4-10% yield on ground-mount or white roof ## Questions ### Is the JA Solar JAM78D10 430-450/MB/1500V series still available for purchase? The JAM78D10 430-450/MB/1500V series has been discontinued and is no longer actively manufactured by JA Solar. Some units may still be available as distributor stock. If you need a comparable bifacial mono PERC solution from JA Solar, consider asking about newer Deep Blue series panels, which offer higher wattages and updated warranty terms. ### What does bifacial mean for the JAM78D10 panels and does it actually increase energy output? Bifacial means the panel harvests light from both the front and the rear surface - the rear gain comes from light reflected off the ground or rooftop. Real-world production gains typically range from 5% to 25% depending on surface albedo and mounting height. The JAM78D10 series performs best on light-colored roofs, gravel beds, snow cover, or ground-mounted structures with open space beneath the module. ### What warranty does JA Solar provide for the JAM78D10 430-450/MB series? JA Solar provides a 12-year product warranty covering material and workmanship defects. In addition, a 30-year linear power output warranty applies, with an annual degradation rate of 0.5%, guaranteeing over 84.8% of nominal power after 30 years. This is among the longer power warranties in the PERC class and is a significant factor when calculating LCOE for utility-scale PV projects. ### What system voltage do the JAM78D10 1500V panels require and are they compatible with standard inverters? The JAM78D10 series is rated for 1500V DC systems. This allows longer strings - more modules per string without exceeding the voltage limit - reducing cabling costs and inverter count. However, it requires a 1500V-compatible inverter. Standard residential inverters rated at 600-1000V are not compatible. This series is intended for commercial rooftop and utility-scale PV applications. ### How does the mono PERC cell technology in the JAM78D10 compare to older polycrystalline panels? Mono PERC cells deliver higher conversion efficiency than polycrystalline cells. The 78-cell layout in this series achieves 430-450 W output in a power density that poly modules cannot match. The PERC passivation layer reduces rear-surface recombination, which lowers the temperature coefficient and keeps output more stable on hot days. Over a 25-30 year project horizon, this translates to a meaningfully lower levelized cost of energy (LCOE). ### Are the JAM78D10 430-450/MB panels suitable for ground-mounted utility-scale installations? Yes, this series was designed primarily for commercial and utility-scale PV projects. The 1500V system rating simplifies long-string design, while the bifacial PERC cells maximize yield on open terrain where ground albedo (grass, gravel) contributes rear-side irradiance. The double-glass construction provides better resistance to outdoor exposure and moisture ingress compared to standard backsheet modules. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/20200619043608512-f54d75c06095.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A480-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a480-mah54mw) | 480 W | Cooler, lighter, +4.6 pp | | [Gokin GK-5-54HG-480M](https://comparepv.com/panel/gokin-gk-5-54hg-480m) | 480 W | Cooler, lighter, +4.6 pp | | [Jinko Solar JKM480N-48QL6-DB-F2-EU](https://comparepv.com/panel/jinko-solar-jkm480n-48ql6-db-f2-eu) | 480 W | +50 W, cooler, +4.5 pp | | [Gamko New Energy GKA96N-PRO-480W](https://comparepv.com/panel/gamko-new-energy-gka96n-pro-480w) | 480 W | Cooler, lighter, +4.5 pp | | [JA Solar JAM78D10-435/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam78d10-435-mb-1500v) | 435 W | Very close match | | [JA Solar JAM78D10-440/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam78d10-440-mb-1500v) | 440 W | +10 W, +0.4 pp | | [JA Solar JAM78D10-445/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam78d10-445-mb-1500v) | 445 W | +15 W, +0.6 pp | | [JA Solar JAM78D10-450/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam78d10-450-mb-1500v) | 450 W | +20 W, +0.9 pp | | [JA Solar JAM78D10-455/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam78d10-455-mb-1500v) | 455 W | +25 W, +1.1 pp | | [Horay Solar HS530TC-MHG-D](https://comparepv.com/panel/horay-solar-hs530tc-mhg-d) | 530 W | +100 W, cooler, +2.7 pp | | [Horay Solar HS525TC-MHG-D](https://comparepv.com/panel/horay-solar-hs525tc-mhg-d) | 525 W | +95 W, cooler, +2.5 pp | | [Huasun HSN-210R-B108DNV500](https://comparepv.com/panel/huasun-hsn-210r-b108dnv500) | 500 W | +70 W, cooler, +2.3 pp | | [Horay Solar HS520TC-MHG-D](https://comparepv.com/panel/horay-solar-hs520tc-mhg-d) | 520 W | +90 W, cooler, +2.3 pp | | [Daxieworld DX500W-30M](https://comparepv.com/panel/daxieworld-dx500w-30m) | 500 W | +70 W, 21 kg lighter, +2.1 pp | | [Huasun HSN-210R-B108DNV495](https://comparepv.com/panel/huasun-hsn-210r-b108dnv495) | 495 W | +65 W, cooler, +2.1 pp | | [Horay Solar HS515TC-MHG-D](https://comparepv.com/panel/horay-solar-hs515tc-mhg-d) | 515 W | +85 W, cooler, +2.1 pp | --- Source: https://comparepv.com/panel/ja-solar-shanghai-ja-solar-technology-co-ltd-jam78d10-430-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.