--- title: "JA Solar JAM72D20-445/MB/1500V 445W Solar Panel - Specs & Review | ComparePV" description: "JA Solar JAM72D20-445/MB/1500V 445W solar panel. Specs: 20.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam72d20-445-mb-1500v" updated: 2026-09-11 --- # JA Solar JAM72D20-445/MB/1500V Warranty pick, heavy for its output 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** JA Solar - **Model:** JAM72D20-445/MB/1500V - **Series:** JAM72D20 440-465/MB/1500V - **Rated power:** 445 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) | 445 W | 410 W | Strong - top 5% | | | Module efficiency | 20.00% | 20.60% | Weak - bottom 13% | 12,214 | | Power density | 199.8 | 206.2 | Weak - bottom 12% | 12,247 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,419 | | Weight (kg) | 27.3 kg | 22.0 kg | Weak - bottom 8% | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 17% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.00% | 20.60% | Weak - bottom 13% | 12,214 | | Power density | 199.8 | 206.2 | Weak - bottom 12% | 12,247 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,419 | | Weight per kWp | 61.3 | 53.0 | Weak - bottom 8% | 12,637 | | 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 - **61.3 kg per kWp** - Bottom 8% of the PERC 400-450 W segment, against a median of 53.0. Ranked 12,637th in the whole database. - **199.8 watts per square metre** - Bottom 12% of the PERC 400-450 W segment, against a median of 206.2. - **20.00% module efficiency** - Bottom 13% of the PERC 400-450 W segment, against a median of 20.60%. - **Best for:** Commercial and shaded-installations. - **Not ideal for:** Weight-limited structures, roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 445 W - **Efficiency:** 20.00 % - **Voltage at Pmax (Vmp):** 40.91 V - **Current at Pmax (Imp):** 10.88 A - **Open-circuit voltage (Voc):** 49.45 V - **Short-circuit current (Isc):** 11.38 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.350 %/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:** 144 - **Bifacial:** yes - **Bifacial gain:** 10.00 ### Physical - **Length:** 2117 mm - **Width:** 1052 mm - **Thickness:** 35 mm - **Weight:** 27.3 kg - **Area:** 2.23 m2 - **Power density:** 199.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 85.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.45 % - **Output after 30 years:** 378 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12214 of 14005 | | Power density | 12247 of 14005 | | Temperature coefficient | 10419 of 14005 | | Weight | 12637 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Bifacial half-cut PERC — rear-side yield** - The bifacial design with 144 half-cut cells (2×72) captures reflected irradiance from the ground. At typical albedo values (grass: ~20%, concrete/gravel: ~30%), rear-side contribution adds 10–25% to annual energy yield compared to monofacial modules, meaningfully improving LCOE for ground-mount and large commercial rooftop systems. - **1500 V system voltage — lower BoS costs** - A 1500 V system voltage enables longer string configurations and reduces the number of DC cables and MPPT inputs per installed MW. For utility-scale PV farms and commercial installations, this translates to a several-percent reduction in BoS costs compared to 1000 V designs, with a direct positive impact on project economics. - **30-year power warranty (≥85% Pnom)** - JA Solar guarantees ≥98% of rated power after year 1 and ≥85% Pnom after 30 years, backed by a 12-year product warranty. The extended warranty horizon supports DCF modeling in PPA structures and simplifies due diligence for institutional investors and project lenders. - **JA Solar — BNEF Tier-1, fully bankable** - JA Solar has been continuously listed on the BNEF Tier-1 module manufacturer ranking (confirmed on the Q2 2026 list). Tier-1 status requires non-recourse financing by at least six banks in projects of ≥10 MW each, directly simplifying third-party project finance for installations using these modules. - **Temperature coefficient Pmax -0.35%/°C** - A Pmax temperature coefficient of -0.35%/°C places this module at the top end of performance for PERC technology (typical PERC range: -0.35 to -0.40%/°C), limiting thermal power losses on hot days and improving annual energy yield in high-irradiance climates. ## Cons - **Discontinued series (end of production 2023)** - The JAM72D20 series ended production in 2023 after three years on the market (released 2020). Limited availability of new modules complicates identical-spec system expansions, and declining spare parts inventory may extend service response times over a 20–30-year operational lifetime. - **Max efficiency 20.9% — below leading peers** - Maximum module efficiency is 20.9%, while the comparable Jinko Solar JS182MHC120 reaches 21.48% (+0.58 pp absolute). This translates to approximately 2.8% less energy output per unit of roof or ground area, a meaningful penalty where available installation space is constrained. - **PERC technology — declining market relevance** - PERC's share of global cell production dropped from ~70% in 2023 to ~20% in 2024, displaced by TOPCon (>65% share). Commercial TOPCon modules achieve 22–23% efficiency and a superior temperature coefficient (~-0.30%/°C). Specifying PERC in 2026 carries lower perceived residual asset value and complicates future capacity additions requiring matched module specs. ## About this series JA Solar JAM72D20 440-465/MB/1500V series is designed for installations where high energy yield from the same surface area and reliable performance in variable conditions are key. The half-cut architecture minimizes power losses in the module and improves performance under partial shading, resulting in more stable yields on rooftops with chimneys, skylights, or ground-mounted systems with seasonal shading. The key feature is the combination of PERC technology with a bifacial design, enabling the module to utilize reflected light from the ground. Additionally, the 1500 V standard simplifies longer string designs, supports cable optimization, and helps reduce BOS costs in larger systems. This is an excellent choice for utility-scale PV farms, commercial and industrial installations, and large rooftops, where **higher yield per square meter**, **better shading tolerance**, **bifacial potential**, and **easier string optimization in 1500 V** are crucial. ## Notable figures - At 20.0% efficiency, this panel is 0.6pp below the \*\*PERC 400-450W\*\* median of 20.6% - Power density of 199.8 W/m² is 6.4 W/m² below \*\*PERC 400-450W\*\* median (206.2 W/m²) - needs more roof space - At -0.35%/°C, hot weather performance is typical for \*\*PERC 400-450W\*\* panels - At 27.3 kg, this panel is 5.3 kg heavier than the \*\*PERC 400-450W\*\* median (22.0 kg) - more demanding for installation crews - Bifacial design (70% factor) captures reflected light - adds 4-10% yield on ground-mount or white roof ## Questions ### Is the JA Solar JAM72D20 440-465/MB/1500V series still available for purchase? The JAM72D20 440-465/MB/1500V series has been discontinued and is no longer actively manufactured by JA Solar. Limited stock may still be available through select distributors, but supply is restricted. If you require module uniformity across a large system, it is worth considering current JA Solar series with comparable specifications rather than relying on residual inventory. ### What does bifacial technology in the JAM72D20 actually deliver, and when does it pay off? The bifacial design of the JAM72D20 allows the module to collect light reflected from the ground or nearby surfaces through its rear side. The greatest gain is seen in ground-mounted systems over light-colored or gravel surfaces, flat roofs with white membranes, and elevated racking systems. On a standard dark pitched roof the bifacial contribution is minimal and should not be the primary purchasing argument. ### How does the half-cut cell architecture in the JAM72D20 help with partial shading? The JAM72D20 uses 144 half-cut cells arranged so the two halves of the module operate independently. When a chimney or dormer shades part of the module, only that section is affected rather than the entire string. Compared to conventional 72-cell full modules, power losses under partial shading are significantly lower, resulting in more stable annual energy yields on real-world rooftops. ### Why does the 1500 V system voltage of the JAM72D20 matter when designing a PV system? The 1500 V rating allows more modules to be connected in a single string without exceeding the inverter voltage limit. This reduces the total length of DC cabling, the number of connectors, and the number of MPPT inputs required, lowering Balance of System (BoS) costs. For utility-scale solar farms and large commercial installations, this translates into measurable savings and a simpler electrical design. ### What warranty does JA Solar provide for the JAM72D20 440-465/MB/1500V panels? JA Solar provides a 12-year product warranty covering material and workmanship defects, along with a 30-year linear power output warranty that defines minimum performance levels throughout the module's service life. As a Tier 1 manufacturer, JA Solar has a well-established market position, which improves the likelihood of warranty claims being honored over the long term. ### What type of installations are JAM72D20 465 W modules best suited for, and do they work on residential rooftops? The JAM72D20 modules at up to 465 Wp measure 2117×1052 mm and weigh approximately 27 kg, making them large-format commercial modules. They are designed primarily for utility-scale solar farms, industrial facilities, and large flat commercial roofs. Residential installation is technically feasible but the size and weight can complicate on-roof logistics. For residential prosumer applications, JA Solar offers dedicated series in a smaller form factor. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/20210706052857722-22ed9b2bc90d.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +4.8 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +4.5 pp | | [Suntech STP-NT11/48QGSF-490](https://comparepv.com/panel/suntech-stp-nt11-48qgsf-490) | 490 W | Cooler, lighter, +4.5 pp | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | Cooler, lighter, +4.3 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | Cooler, lighter, +4.3 pp | | [Longi Solar LR7-54HJD-495M](https://comparepv.com/panel/longi-lr7-54hjd-495m) | 495 W | +50 W, cooler, +4.3 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | Cooler, lighter, +4.3 pp | | [JA Solar MYM6144-430](https://comparepv.com/panel/ja-solar-mym6144-430) | 430 W | Hotter, -0.5 pp, -5 yr warranty | | [JA Solar JAM72D20-435/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam72d20-435-mb-1500v) | 435 W | -10 W, -0.5 pp | | [JA Solar MYM6144-435](https://comparepv.com/panel/ja-solar-mym6144-435) | 435 W | Hotter, lighter, -5 yr warranty | | [JA Solar JAM72D20-440/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam72d20-440-mb-1500v) | 440 W | Very close match | | [JA Solar MYM6144-440](https://comparepv.com/panel/ja-solar-mym6144-440) | 440 W | Hotter, lighter, -5 yr warranty | | [JA Solar JAM72S20-445/MR](https://comparepv.com/panel/ja-solar-jam72s20-445-mr-1) | 445 W | Lighter, -5 yr warranty | | [JA Solar MYM6144-445](https://comparepv.com/panel/ja-solar-mym6144-445) | 445 W | Hotter, lighter, -5 yr warranty | | [JA Solar JAM72S20-450/MR](https://comparepv.com/panel/ja-solar-jam72s20-450-mr-1) | 450 W | Lighter, +0.3 pp, -5 yr warranty | | [JA Solar JAM72D20-450/MB/1500V](https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam72d20-450-mb-1500v) | 450 W | Very close match | | [Gamko New Energy GKA120N-PRO-590W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-590w) | 590 W | +145 W, cooler, +3.8 pp | --- Source: https://comparepv.com/panel/shanghai-ja-solar-technology-co-ltd-jam72d20-445-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.