--- title: "Jshine Solar Technology JS 380~400W 120M6 HJT DG (400W class) 400W Solar Panel - Specs & Review | ComparePV" description: "Jshine Solar Technology JS 380~400W 120M6 HJT DG (400W class) 400W solar panel. Specs: 21.96% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/jshine-solar-technology-js-380-400w-120m6-hjt-dg-400w-class" updated: 2026-09-11 --- # Jshine Solar Technology JS 380~400W 120M6 HJT DG (400W class) Middle of its segment, heavy for its output 113 panels in the segment HJT 400-450 W ## Identity - **Manufacturer:** Jshine Solar Technology - **Model:** JS 380~400W 120M6 HJT DG (400W class) - **Series:** JS 380~400W 120M6 HJT DG - **Rated power:** 400 W - **Cell technology:** HJT - **Bifacial:** yes ## How it compares Compared against segment HJT 400-450 W (113 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 400 W | 435 W | Weak - bottom 4% | | | Module efficiency | 21.96% | 22.20% | Typical | 6,741 | | Power density | 219.6 | 221.6 | Typical | 6,698 | | Temperature coefficient | -0.240 | -0.240 | Typical | 13 | | Weight (kg) | 22.8 kg | 23.0 kg | Weak - bottom 15% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.96% | 22.20% | Typical | 6,741 | | Power density | 219.6 | 221.6 | Typical | 6,698 | | Temperature coefficient | -0.240 | -0.240 | Typical | 13 | | Weight per kWp | 57.0 | 52.4 | Weak - bottom 15% | 10,998 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **57.0 kg per kWp** - Bottom 15% of the HJT 400-450 W segment, against a median of 52.4. - **Best for:** Residential, commercial and hot-climate. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 400 W - **Efficiency:** 21.96 % - **Voltage at Pmax (Vmp):** 38.43 V - **Current at Pmax (Imp):** 10.41 A - **Open-circuit voltage (Voc):** 45.45 V - **Short-circuit current (Isc):** 11.13 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.240 %/degC - **Temperature coefficient of Voc:** -0.220 %/degC - **Temperature coefficient of Isc:** 0.047 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** HJT - **Cell count:** 120 - **Bifacial:** yes ### Physical - **Length:** 1755 mm - **Width:** 1038 mm - **Thickness:** 30 mm - **Weight:** 22.8 kg - **Area:** 1.82 m2 - **Power density:** 219.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 30 years - **Performance warranty:** 30 years - **First-year degradation:** 2.00 % - **Annual degradation:** 0.55 % - **Output after 30 years:** 328 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 6741 of 14005 | | Power density | 6698 of 14005 | | Temperature coefficient | 13 of 14005 | | Weight | 10998 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Best-in-class temperature coefficient** - HJT technology delivers a temperature coefficient of approximately -0.24%/°C, outperforming PERC (-0.35%/°C) and TOPCon (-0.30%/°C). In real-world conditions where module temperature exceeds 60°C in summer, HJT generates 5–7% more energy than an equivalent PERC panel at the same irradiance. - **Up to 21.96% efficiency — top of peer group** - The highest-efficiency variant reaches 21.96% module efficiency, exceeding Meyer Burger White (21.7%), MWG Mono (19.32%), and significantly outpacing DMEGC GH400M10T-B48HST (15.48%). Within the listed peer comparables, this series ranks first by peak efficiency. - **Low degradation — LID-free N-type cells** - HJT cells built on N-type silicon are inherently immune to Light-Induced Degradation (LID). Typical annual degradation is ~0.25%, compared to 0.40–0.55% for PERC technology. Over a 30-year warranty period, this translates to roughly 5–9 percentage points more retained nameplate power versus PERC modules of the same nominal wattage. - **Bifacial + double glass: higher yield and durability** - A bifaciality factor of up to 95% enables 10–30% additional energy yield on high-albedo surfaces (concrete, light gravel, snow). The glass-glass construction eliminates moisture ingress and EVA delamination associated with backsheet designs — a critical advantage for ground-mounted systems and agrivoltaic applications in humid climates. - **30-year product and power warranty** - The manufacturer provides a 30-year warranty on both the product and power output — matching Meyer Burger White among the listed peers. This exceeds the 25-year power warranty standard common across mainstream Tier-1 manufacturers including MWG Mono. ## Cons - **Not on BNEF Tier 1 list** - Jshine Solar Technology does not appear on BloombergNEF's Tier 1 module manufacturer lists (verified across Q1 2025 – Q1 2026 publications). While Tier 1 status does not assess technical quality, it is a prerequisite for bankability in commercially financed utility-scale and C&I projects. Its absence may restrict access to project financing from international lenders. - **HJT price premium over TOPCon and PERC** - As of 2025, HJT modules carry a 15–30% price premium over PERC and approximately 30–50% over TOPCon at equivalent nameplate wattage. For residential prosumer installations, particularly on dark rooftops where bifacial rear-side gain is negligible, the improved LCOE from higher efficiency may not fully offset the higher upfront BoS cost. - **Increased weight from double glass construction** - Replacing the backsheet with a rear glass pane adds an estimated 4–6 kg per module (typical glass-glass 380–400 W units weigh ~26–28 kg vs. ~20–22 kg for backsheet variants). Rooftop installations require load-bearing verification, and additional weight increases BoS costs for racking, transport, and handling. ## About this series The Jshine Solar Technology JS 380-400W 120M6 HJT DG series consists of modules based on the **HJT technology**, designed for high energy production even under less-than-ideal conditions. The use of a **bifacial** design allows for the utilization of not only direct sunlight, but also reflected light from the ground - which makes it possible to achieve higher energy yields on bright roofs, ground-mounted structures, or with appropriately chosen gravel. A key advantage of this series is its **low temperature sensitivity**, which ensures stable operation in hot weather, while many standard modules experience a more significant loss of power. The **double glass (DG)** construction provides durability in demanding environments - where resistance to moisture and long-term laminate stability are crucial. This is a reasonable choice for residential and commercial installations, as well as PV farms, where predictable production and robust, modern technology are prioritized over compromises. ## Notable figures - Efficiency of 22.0% matches the \*\*HJT 400-450W\*\* median - At 219.6 W/m² power density, roof space requirements are typical for \*\*HJT 400-450W\*\* panels - At -0.24%/°C, hot weather performance is typical for \*\*HJT 400-450W\*\* panels - Bifaciality factor of 85% can add 4-13% extra yield with reflective mounting surface - Ranked #6741 out of 14005 panels for efficiency in the database ## Questions ### What warranty does the Jshine Solar JS 380-400W HJT DG series offer? The JS 380-400W HJT DG series comes with a 30-year product warranty and a 30-year power output warranty — among the longest coverage periods available in the residential and commercial PV market. The extended warranty is backed by the inherent durability of HJT cell technology and the double glass construction, both of which result in very low annual degradation rates. ### Does the bifacial design of the Jshine HJT 400W DG make sense for ground-mounted systems with gravel? Yes — the bifacial design captures reflected irradiance from the ground in addition to direct sunlight. On ground-mounted systems with high-albedo surfaces such as white gravel, a light membrane, or concrete, real-world energy yield can noticeably exceed the rated 400 Wp. The bifacial gain is maximized when the frame is elevated and the ground cover has an albedo above 0.3. ### How does summer heat affect the output of Jshine JS HJT DG panels? The series carries a temperature coefficient of Pmax of approximately -0.24%/°C — one of the lowest in the industry. Standard PERC modules typically reach -0.38%/°C. On a hot day when the module surface hits 60°C, this HJT series retains significantly more power than conventional monocrystalline panels, which translates to measurably higher annual energy yield in real-world conditions. ### What does the DG designation mean in the Jshine JS 380-400W series and why does it matter for longevity? DG stands for double glass — both the front and rear surfaces use tempered glass instead of a standard polymer backsheet. This construction provides superior resistance to moisture ingress, delamination, and long-term UV degradation, making it well-suited for demanding environments including coastal areas and flat commercial rooftops. The glass rear layer is also structurally required for proper bifacial light capture. ### Are Jshine JS HJT 400W DG panels compatible with standard pitched roof mounting systems? Yes — with dimensions of approximately 1755 × 1038 mm and a weight of around 22.8 kg, the panels fit standard rail-based roof mounting systems used across most residential and commercial installations. Note that the bifacial advantage is minimal on pitched roofs since the rear side faces the roof deck. Full bifacial gains are best realized on elevated ground-mounted frames with a reflective surface underneath. ### How does HJT technology in the Jshine series compare to TOPCon and PERC? HJT (heterojunction technology) bonds monocrystalline silicon with amorphous silicon layers, delivering a very low temperature coefficient and an inherently high bifacial factor of up to 95%. TOPCon uses tunnel oxide passivation on n-type silicon for competitive efficiency at a lower manufacturing cost. PERC is an older p-type architecture with higher temperature sensitivity. Of the three, HJT leads in thermal performance and bifaciality; TOPCon offers the best cost-to-efficiency ratio; PERC is the most established and affordable baseline technology. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/1-9db6a9bbc387.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Luxor Solar LX-440M/182-108+GG](https://comparepv.com/panel/luxor-solar-lx-440m-182-108-gg) | 440 W | +40 W, +1.1 pp | | [Just Solar JST-EDMH-(445-465)W-TD (450W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-450w-class) | 450 W | +50 W, hotter, +1.1 pp | | [Q-SUN Solar QNN182-HG450-54](https://comparepv.com/panel/qn-solar-pv-limited-qnn182-hg450-54) | 450 W | +50 W, hotter, +1.1 pp | | [Huayao HY440-N108BDD](https://comparepv.com/panel/huayao-hy440-n108bdd) | 450 W | +50 W, hotter, +1.1 pp | | [BYD NLBK-27-450](https://comparepv.com/panel/byd-nlbk-27-450) | 450 W | +50 W, hotter, +1.1 pp | | [Renesola RS41-450NBG-E3](https://comparepv.com/panel/renesola-rs41-450nbg-e3) | 450 W | +50 W, hotter, +1.1 pp | | [Jshine Solar Technology JS 380~400W 120M6 HJT DG (380W class)](https://comparepv.com/panel/jshine-solar-technology-js-380-400w-120m6-hjt-dg-380w-class) | 380 W | -20 W, -1.1 pp | | [Jshine Solar Technology JS 380~400W 120M6 HJT DG (385W class)](https://comparepv.com/panel/jshine-solar-technology-js-380-400w-120m6-hjt-dg-385w-class) | 385 W | -15 W, -0.8 pp | | [Jshine Solar Technology JS 380~400W 120M6 HJT DG (390W class)](https://comparepv.com/panel/jshine-solar-technology-js-380-400w-120m6-hjt-dg-390w-class) | 390 W | -10 W, -0.6 pp | | [Jshine Solar Technology JS 380~400W 120M6 HJT DG (395W class)](https://comparepv.com/panel/jshine-solar-technology-js-380-400w-120m6-hjt-dg-395w-class) | 395 W | -0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +110 W, +3.0 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +95 W, hotter, +2.8 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +105 W, +2.7 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +90 W, hotter, +2.5 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +100 W, +2.5 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +100 W, hotter, +2.5 pp | --- Source: https://comparepv.com/panel/jshine-solar-technology-js-380-400w-120m6-hjt-dg-400w-class Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.