--- title: "VSUN VSUN455N-120MH-BB 455W Solar Panel - Specs & Review | ComparePV" description: "VSUN VSUN455N-120MH-BB 455W solar panel. Specs: 21.03% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/vsun-vsun455n-120mh-bb" updated: 2026-09-11 --- # VSUN VSUN455N-120MH-BB Middle of its segment, modest efficiency 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** VSUN - **Model:** VSUN455N-120MH-BB - **Series:** VSUN N-120MH-BB - **Rated power:** 455 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 450-500 W (1089 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 455 W | 465 W | Typical | | | Module efficiency | 21.03% | 22.52% | Weak - bottom 2% | 9,671 | | Power density | 210.3 | 225.2 | Weak - bottom 2% | 9,646 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 20% | 6,093 | | Weight (kg) | 23.9 kg | 24.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.03% | 22.52% | Weak - bottom 2% | 9,671 | | Power density | 210.3 | 225.2 | Weak - bottom 2% | 9,646 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 20% | 6,093 | | Weight per kWp | 52.5 | 52.2 | Typical | 6,129 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **21.03% module efficiency** - Bottom 2% of the TOPCon 450-500 W segment, against a median of 22.52%. Ranked 9,671st in the whole database. - **210.3 watts per square metre** - Bottom 2% of the TOPCon 450-500 W segment, against a median of 225.2. Ranked 9,646th in the whole database. - **-0.300 %/°C temperature coefficient** - Bottom 20% of the TOPCon 450-500 W segment, against a median of -0.290. - **Best for:** Residential, commercial, shaded-installations and hot-climate. - **Not ideal for:** Tight roof space, roofs where every square metre has to count and hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 455 W - **Efficiency:** 21.03 % - **Voltage at Pmax (Vmp):** 34.60 V - **Current at Pmax (Imp):** 13.16 A - **Open-circuit voltage (Voc):** 41.91 V - **Short-circuit current (Isc):** 13.90 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.260 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 120 ### Physical - **Length:** 1908 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 23.9 kg - **Area:** 2.16 m2 - **Power density:** 210.3 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 398 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9671 of 14005 | | Power density | 9646 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 6129 of 14005 | | Warranty | 21 of 14005 | ## About this series The VSUN N-120MH-BB photovoltaic module series represents a breakthrough in efficiency thanks to the use of advanced **N-type cells in TOPCon technology**. This solution almost completely eliminates the problem of light-induced degradation (LID) and potential-induced degradation (PID), which translates into a significantly longer lifespan and stability of energy yields in the long-term perspective. These panels stand out for their exceptional operational efficiency even in low-light conditions, which is key to optimizing the return on investment in the Polish climate. The design based on 120 half-cut cells effectively minimizes energy losses resulting from internal resistance and limits the negative impact of partial shading on the operation of the entire system. Thanks to the use of **bifacial energy generation**, these modules can obtain additional power from radiation reflected from the ground, making them an ideal choice for modern home micro-installations and solar farms. The robust frame provides **high resistance to extreme mechanical loads**, such as heavy snow or strong winds, guaranteeing full technical safety. By choosing the VSUN N-120MH-BB, investors receive an **exceptionally favorable temperature coefficient**, which allows for maintaining a stable power output even during hot summer days, clearly distinguishing this series from older P-type solutions available on the market. ## Notable figures - At 21.0% efficiency, this panel is 1.5pp below the \*\*TOPCon 450-500W\*\* median of 22.5% - Power density of 210.3 W/m² is 14.9 W/m² below \*\*TOPCon 450-500W\*\* median (225.2 W/m²) - needs more roof space - Temperature coefficient of -0.30%/°C matches the \*\*TOPCon 450-500W\*\* median - Ranked #9671 out of 14005 panels for efficiency in the database ## Questions ### How does TOPCon cell technology in the VSUN N-120MH-BB differ from older PERC cells? The N-type TOPCon cells used in the VSUN N-120MH-BB feature an additional tunnel oxide layer that reduces recombination losses as well as LID and PID degradation, common issues in older P-type PERC panels. This lets the module reach efficiency up to about 21.7% and deliver a more stable energy yield over the long term, resulting in higher total energy output from the system. ### What is the maximum power output and efficiency of the VSUN N-120MH-BB panels? The VSUN N-120MH-BB series reaches a maximum power of up to 470 Wp with module efficiency of around 21.7%. This is thanks to 120 N-type half-cut cells, which reduce resistive losses and improve panel performance under partial shading, such as from chimneys or roof antennas, by letting cell segments operate independently. ### Are the VSUN N-120MH-BB panels bifacial, generating power from the rear side too? No, the N-120MH-BB version is a monofacial module with a white backsheet, designed for standard roof-mounted installations. VSUN also offers a dual-glass variant in the same family, the BMH-DG-BB, which is bifacial and better suited to ground-mount setups or light-colored surfaces where reflected light can be captured. ### What warranty comes with the VSUN N-120MH-BB panels? The manufacturer provides a 25-year product warranty and a 30-year power output warranty, standard for modern N-type modules. This means that even after 30 years of operation the panel should retain a significant share of its rated initial power output, making the series a solid investment despite being discontinued. ### Do the VSUN N-120MH-BB panels perform well in high summer temperatures? Yes, with a power temperature coefficient of -0.3%/°C, the module loses less output as temperature rises compared to older P-type panels, which typically sit around -0.35 to -0.40%/°C. In practice, this means more stable energy production on hot summer days, which matters when designing systems for Poland's summer climate. ### Is the VSUN N-120MH-BB series still available for purchase? The N-120MH-BB series has been discontinued by VSUN and replaced by newer models. Availability is now limited to remaining distributor stock. Before buying panels for a larger installation, it's worth confirming current stock with your supplier, as matching panels from the same production batch may not be available for future additions. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/661e0d9c0c4e0-b62705231b38.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +40 W, cooler, +3.8 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +50 W, cooler, +3.7 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +35 W, cooler, +3.5 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +45 W, cooler, +3.5 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +45 W, cooler, +3.5 pp | | [Gokin GK-3-54HGb-500M](https://comparepv.com/panel/gokin-gk-3-54hgb-500m) | 500 W | +45 W, cooler, +3.5 pp | | [VSUN VSUN460N-120BMH-DG-BB](https://comparepv.com/panel/vsun-vsun460n-120bmh-dg-bb) | 460 W | Heavier, +0.2 pp | | [VSUN VSUN465N-120BMH-DG-BB](https://comparepv.com/panel/vsun-vsun465n-120bmh-dg-bb) | 465 W | +10 W, heavier, +0.5 pp | | [VSUN VSUN470N-120MH-BB](https://comparepv.com/panel/vsun-vsun470n-120mh-bb) | 470 W | +15 W, +0.7 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +105 W, cooler, +3.8 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +100 W, cooler, +3.6 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +95 W, lighter, +3.4 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +85 W, cooler, +3.4 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +85 W, cooler, +3.4 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +90 W, cooler, +3.2 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +90 W, cooler, +3.2 pp | --- Source: https://comparepv.com/panel/vsun-vsun455n-120mh-bb Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.