--- title: "Yingli YL400DF54 e/2 Solar Panel: Specs & Datasheet | ComparePV" description: "Yingli YL400DF54 e/2 solar panel. Specs: 20.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/yingli-yl400df54-e-2" image: "https://comparepv.com/og/panel/yingli-yl400df54-e-2.png" updated: 2026-09-11 --- # Yingli YL400DF54 e/2 Warranty pick, heavy for its output 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Yingli - **Model:** YL400DF54 e/2 - **Series:** YLM 3.0 Mini 1 - **Rated power:** 400 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) | 400 W | 410 W | Weak - bottom 9% | | | Module efficiency | 20.50% | 20.60% | Typical | 11,389 | | Power density | 204.8 | 206.2 | Typical | 11,450 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,489 | | Weight (kg) | 24.8 kg | 22.0 kg | Weak - bottom 6% | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 17% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.50% | 20.60% | Typical | 11,389 | | Power density | 204.8 | 206.2 | Typical | 11,450 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,489 | | Weight per kWp | 62.0 | 53.0 | Weak - bottom 6% | 12,824 | | 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 - **62.0 kg per kWp** - Bottom 6% of the PERC 400-450 W segment, against a median of 53.0. Ranked 12,824th in the whole database. - **Best for:** Residential, commercial, shaded-installations and cold-climate. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 400 W - **Efficiency:** 20.50 % - **Voltage at Pmax (Vmp):** 30.56 V - **Current at Pmax (Imp):** 13.09 A - **Open-circuit voltage (Voc):** 37.00 V - **Short-circuit current (Isc):** 13.86 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.350 %/degC - **Temperature coefficient of Voc:** -0.280 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 39 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 108 - **Bifacial:** yes ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 24.8 kg - **Area:** 1.95 m2 - **Power density:** 204.8 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:** 340 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 11389 of 14129 | | Power density | 11450 of 14129 | | Temperature coefficient | 10489 of 14129 | | Weight | 12824 of 14129 | | Warranty | 21 of 14129 | ## About this series The Yingli YLM 3.0 Mini 1 series is designed for installations where high power density is key, while maintaining a convenient and compact module format. This is an ideal solution for individuals and companies seeking to extract maximum performance from rooftops with limited surface area or more challenging roof geometries - without compromising on manufacturing quality. The series stands out due to its **half-cell architecture**, which helps reduce resistive losses and stabilizes module performance under partial shading. The applied **multi-busbar technology** improves current collection and increases resistance to microcracks, which is particularly important in Polish conditions (snow, wind, freeze-thaw cycles). The series also emphasizes **high reliability in harsh environments**, thanks to refined lamination and layer structure design. The YLM 3.0 Mini 1 will perform excellently in single-family homes, small and medium-sized businesses, and renovation projects where **long-term, reliable performance** and predictable energy yield are crucial. ## Notable figures - At 20.5% efficiency, this panel is on par with typical \*\*PERC 400-450W\*\* modules - At 204.8 W/m² power density, roof space requirements are typical for \*\*PERC 400-450W\*\* panels - Temperature coefficient of -0.35%/°C matches the \*\*PERC 400-450W\*\* median - At 24.8 kg, this panel is 2.8 kg heavier than the \*\*PERC 400-450W\*\* median (22.0 kg) - more demanding for installation crews - Bifaciality factor of 70% can add 4-10% extra yield with reflective mounting surface ## Questions ### What is the maximum power output of the Yingli YLM 3.0 Mini 1 panel? Panels from the YLM 3.0 Mini 1 series reach a maximum power output of up to 415 Wp. Given the module's compact mini format, this represents a very good power density, allowing more energy to be generated from a limited roof area compared to older, less efficient module designs. ### Is the Yingli YLM 3.0 Mini 1 suitable for roofs with limited space or unusual geometry? Yes, this is one of the series' main use cases. The compact module format makes it easier to fit smaller roof sections, dormers, or complex roof shapes. The half-cut cell architecture also improves performance under partial shading, which is common on such roofs. ### What warranty comes with the Yingli YLM 3.0 Mini 1 panels? The manufacturer offers a 12-year product warranty and a 30-year power performance warranty. Yingli is a tier 1 manufacturer, which further increases confidence that the warranty will actually be honored over such a long time horizon, not just exist on paper. ### How does the PERC technology in the YLM 3.0 Mini 1 differ from standard cells? PERC cells feature an additional passivation layer on the rear side that reflects unused light back into the cell, increasing conversion efficiency. Combined with multi-busbar technology, this improves current collection and reduces losses, resulting in higher energy yield from the same panel surface area. ### Does the YLM 3.0 Mini 1 perform well in Polish climate conditions? Yes, the series is designed for demanding operating conditions such as snow, strong wind, and freeze-thaw cycles. Multi-busbar technology increases resistance to microcracks, while careful lamination and layer construction reduce the risk of module degradation in variable climates. ### Is the YLM 3.0 Mini 1 a bifacial panel? No, the YLM 3.0 Mini 1 series uses monofacial PERC cells, generating power only from the front side of the module. This makes it well suited for standard rooftop installations, where the module is mounted directly on the roof surface with no light access from the rear. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/1752828763162-32cff1a4e5ea.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, cooler, +2.6 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, cooler, +2.6 pp | | [Q-SUN Solar QNN182-HG450-54](https://comparepv.com/panel/qn-solar-pv-limited-qnn182-hg450-54) | 450 W | +50 W, cooler, +2.5 pp | | [Huayao HY440-N108BDD](https://comparepv.com/panel/huayao-hy440-n108bdd) | 450 W | +50 W, cooler, +2.5 pp | | [BYD NLBK-27-450](https://comparepv.com/panel/byd-nlbk-27-450) | 450 W | +50 W, cooler, +2.5 pp | | [Renesola RS41-450NBG-E3](https://comparepv.com/panel/renesola-rs41-450nbg-e3) | 450 W | +50 W, cooler, +2.5 pp | | [Yingli YL390D-37e 1/2 / YL390D-37e 1500V 1/2](https://comparepv.com/panel/yingli-yl390d-37e-1-2-yl390d-37e-1500v-1-2) | 390 W | Lighter, -0.5 pp, -5 yr warranty | | [Yingli YL395D-37e 1/2 / YL395D-37e 1500V 1/2](https://comparepv.com/panel/yingli-yl395d-37e-1-2-yl395d-37e-1500v-1-2) | 395 W | Lighter, -0.3 pp, -5 yr warranty | | [Yingli YL405D-37e 1/2 / YL405D-37e 1500V 1/2](https://comparepv.com/panel/yingli-yl405d-37e-1-2-yl405d-37e-1500v-1-2) | 405 W | Lighter, -5 yr warranty | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +110 W, cooler, +4.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +95 W, cooler, +4.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +105 W, cooler, +4.2 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | +105 W, cooler, +4.2 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +90 W, cooler, +4.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +100 W, cooler, +4.0 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +100 W, cooler, +4.0 pp | --- Source: https://comparepv.com/panel/yingli-yl400df54-e-2 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.