--- title: "Emmvee E450HCM120-B 450W Solar Panel - Specs & Review | ComparePV" description: "Emmvee E450HCM120-B 450W solar panel. Specs: 20.74% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/emmvee-e450hcm120-b" updated: 2026-09-11 --- # Emmvee E450HCM120-B Solid all-round for its segment 449 panels in the segment PERC 450-500 W ## Identity - **Manufacturer:** Emmvee - **Model:** E450HCM120-B - **Series:** Graphite Monoperc Black on Black - **Rated power:** 450 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 450-500 W (449 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 450 W | 460 W | Weak - bottom 12% | | | Module efficiency | 20.74% | 20.82% | Typical | 10,645 | | Power density | 207.4 | 208.5 | Typical | 10,621 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,419 | | Weight (kg) | 24.0 kg | 24.5 kg | Typical | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.74% | 20.82% | Typical | 10,645 | | Power density | 207.4 | 208.5 | Typical | 10,621 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,419 | | Weight per kWp | 53.3 | 53.1 | Typical | 7,178 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 450 W - **Efficiency:** 20.74 % - **Voltage at Pmax (Vmp):** 34.31 V - **Current at Pmax (Imp):** 13.12 A - **Open-circuit voltage (Voc):** 41.56 V - **Short-circuit current (Isc):** 13.81 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:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 120 ### Physical - **Length:** 1913 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 24.0 kg - **Area:** 2.17 m2 - **Power density:** 207.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.55 % - **Output after 30 years:** 369 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10645 of 14005 | | Power density | 10621 of 14005 | | Temperature coefficient | 10419 of 14005 | | Weight | 7178 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Black-on-Black aesthetic design** - Black anodized frame and black backsheet create a uniform, discreet rooftop appearance - a key selling point in the residential segment where facade aesthetics often drive module choice. - **PERC half-cut cells with multi-busbar** - Half-cut cells reduce current losses and improve partial-shading tolerance, while multi-busbar technology lowers microcrack risk and series resistance losses - a proven design approach that increases real-world module longevity. - **25-year linear power warranty + PID resistance** - The manufacturer offers a segment-standard 12-year product warranty and 25-year linear power warranty, and certified PID (potential induced degradation) resistance limits power loss risk in long strings on large-scale installations. - **Long-established manufacturer track record** - Emmvee has been operating in the PV market since 1992, giving it a longer operational history than many competitors from Asia that entered the market only in the last decade - relevant when assessing warranty risk. ## Cons - **Lower efficiency than peer comparables** - Maximum efficiency of 21.03% is markedly lower than comparable 540 Wp models - Horay Solar HS 199R-120 (23.1%), Horay Solar HS 182-132 Ocean (22.7%), and Gokin GK-5-60HG (24.4%), a gap of up to 3.4 percentage points, meaning more roof area is needed to reach the same installed capacity. - **Manufacturer not on BNEF Tier 1 list** - Emmvee does not appear as a bankable Tier 1 manufacturer per BloombergNEF, which can complicate financing for large commercial projects requiring banks' Tier 1 criteria, though BNEF itself notes Tier 1 status does not reflect technical quality. - **PERC technology, no bifacial option** - The series uses only monofacial PERC cells, while comparable competitor models (e.g., Horay Solar HS 182-132 Ocean, N-type bifacial) offer additional rear-side energy yield - Graphite Black on Black does not provide this option. ## About this series The Graphite Monoperc Black on Black series is a photovoltaic module line built for the aesthetics of residential roofs and facades, where a uniform, all-black look of the installation matters most. The panel pairs an anodized black frame with a black backsheet and high-transmission, anti-reflective coated glass, allowing it to blend into the roof rather than visually dominate it. At its core are **half-cut monocrystalline PERC cells**, which reduce current losses and improve resilience to partial shading - a common challenge on complex roof layouts. The **multi-busbar technology** used ensures better current collection and lowers the risk of micro-cracks, extending the panel's real-world lifespan. The module also stands out for its **PID (potential-induced degradation) resistance**, which matters in large installations with long strings, and for its **low annual power degradation**, translating into more stable energy output over the entire service life. The reinforced construction withstands high snow and wind loads, making it suitable for both rooftop and ground-mount installations in demanding climates. Offered in several cell-count configurations, the series lets installers match panel size and power to the specific project - from single-family homes to commercial installations, where aesthetics matter alongside performance and a **low LCOE** over the system's lifetime. ## Notable figures - At 20.7% efficiency, this panel is on par with typical \*\*PERC 450-500W\*\* modules - At 207.4 W/m² power density, roof space requirements are typical for \*\*PERC 450-500W\*\* panels - Temperature coefficient of -0.35%/°C matches the \*\*PERC 450-500W\*\* median - In the top 76% for efficiency among all PERC panels ## Questions ### What is the power output of Emmvee Graphite Monoperc Black on Black panels? Modules from the Graphite Monoperc Black on Black series reach a maximum power output of up to 540 Wp. The panel uses monocrystalline PERC half-cut cells and multi-busbar technology, delivering high efficiency while keeping a uniform, all-black appearance across the entire module surface. ### Are Emmvee Graphite Monoperc Black on Black panels suitable for a pitched residential roof? Yes, the series was designed with residential roofs in mind, where aesthetics matter. The black anodized frame and black backsheet give a uniform, sleek look with no visible mounting hardware. The reinforced construction is rated for snow and wind loads, making it suitable for both pitched and flat roof installations. ### What warranty comes with Emmvee Graphite Monoperc Black on Black panels? The manufacturer offers a 12-year product warranty and a 25-year linear power output warranty. This means the module retains its guaranteed minimum performance over a quarter century of operation, which is standard for modern monocrystalline PERC-class panels. ### How do half-cut cells and multi-busbar technology differ from standard cells in Emmvee panels? Half-cut cells are cut in half, reducing current losses and improving the panel's tolerance to partial shading, such as from a chimney or tree. Multi-busbar technology improves current collection across the cell surface and lowers the risk of microcracks, resulting in greater durability and more stable energy production over time. ### Are Emmvee Graphite Monoperc panels PID-resistant and suitable for large-scale installations? Yes, the modules feature resistance to potential-induced degradation (PID), which matters for installations with long strings, typical of solar farms and large commercial sites. Combined with low annual power degradation, this ensures stable energy output and a lower LCOE over the installation's full lifecycle. ### Who manufactures Graphite Monoperc Black on Black panels, and is Emmvee a tier-1 manufacturer? The panels are manufactured by Emmvee, a company headquartered in India. It is not currently listed as a tier-1 manufacturer under BloombergNEF's classification, which is worth considering for project bankability, though it does not directly reflect the module's technical quality, as confirmed by its warranty specifications. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Graphite144132120108-India-11d2271e6318.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, +4.1 pp, +5 yr warranty | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, +3.8 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +50 W, cooler, +3.8 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +50 W, cooler, +3.8 pp | | [Gokin GK-3-54HGb-500M](https://comparepv.com/panel/gokin-gk-3-54hgb-500m) | 500 W | +50 W, cooler, +3.8 pp | | [GCL GCL-NR10R/54BGDF](https://comparepv.com/panel/gcl-gcl-nr10r-54bgdf) | 500 W | +50 W, cooler, +3.8 pp | | [Emmvee E440HCM120-B](https://comparepv.com/panel/emmvee-e440hcm120-b) | 440 W | -10 W, -0.5 pp | | [Emmvee E445HCM120-B](https://comparepv.com/panel/emmvee-e445hcm120-b) | 445 W | -0.2 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +110 W, cooler, +4.1 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +105 W, cooler, +3.9 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +100 W, cooler, +3.7 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +90 W, cooler, +3.7 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +90 W, cooler, +3.7 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +95 W, cooler, +3.5 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +95 W, cooler, +3.5 pp | --- Source: https://comparepv.com/panel/emmvee-e450hcm120-b Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.