--- title: "Emmvee E400HCMW108 400W Solar Panel - Specs & Review | ComparePV" description: "Emmvee E400HCMW108 400W solar panel. Specs: 20.51% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/emmvee-e400hcmw108" updated: 2026-09-11 --- # Emmvee E400HCMW108 Light for its output, no clear weak spot 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Emmvee - **Model:** E400HCMW108 - **Series:** Pearl - **Rated power:** 400 W - **Cell technology:** PERC ## 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 | 20.51% | 20.60% | Typical | 11,268 | | Power density | 205.1 | 206.2 | Typical | 11,317 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,419 | | Weight (kg) | 20.0 kg | 22.0 kg | Strong - top 17% | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.51% | 20.60% | Typical | 11,268 | | Power density | 205.1 | 206.2 | Typical | 11,317 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,419 | | Weight per kWp | 50.0 | 53.0 | Strong - top 17% | 3,317 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Strengths - **50.0 kg per kWp** - Top 17% of the PERC 400-450 W segment, against a median of 53.0. - **Best for:** Residential, commercial and cold-climate. ## Specification ### Electrical - **Rated power (Pmax):** 400 W - **Efficiency:** 20.51 % - **Voltage at Pmax (Vmp):** 31.81 V - **Current at Pmax (Imp):** 12.58 A - **Open-circuit voltage (Voc):** 36.61 V - **Short-circuit current (Isc):** 13.21 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 ### Physical - **Length:** 1720 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 20.0 kg - **Area:** 1.95 m2 - **Power density:** 205.1 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:** 328 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 11268 of 14005 | | Power density | 11317 of 14005 | | Temperature coefficient | 10419 of 14005 | | Weight | 3317 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Glass-Glass (Dual-Glass) Construction** - Replacing the rear PVF/PET backsheet with tempered glass (2 mm) eliminates moisture ingress and EVA encapsulant degradation — a primary failure mode in humid climates. Glass-glass modules are rated for a service life exceeding 30 years, compared to 25–27 years for standard glass-foil designs, directly translating into a higher NPV for the installation. - **Up to 21.1% Efficiency — Top of Segment** - The peak efficiency of 21.1% matches the S-Energy SE65-72BGJ (21.1%) and trails the Waaree ARKA (21.17%) and Jinko Tiger Pro 72HC-TV (21.13%) by only 0.07 percentage points. The Pearl series therefore ranks among the top peers in the glass-glass PERC segment with no meaningful loss in power density per m². - **Wide Power Range — 11 Variants (395–545 Wp)** - A 150 Wp spread across 11 variants allows the module to be matched to residential prosumer installations (lower wattages, smaller rooftops) as well as commercial projects (545 Wp) without changing supplier. Most peer-comparable series typically offer only 1–3 variants. - **25-Year Linear Power Warranty** - A 25-year performance warranty with an annual degradation rate of ~0.40% (per Emmvee datasheet for glass-glass construction) results in retention of approximately 87.4% of nominal power at end of warranty — a level consistent with Jinko Solar and Waaree offerings in this segment, confirming the long-term financial stability of the investment. - **Resistance to PID, Salt, and Ammonia** - The dual-glass design mitigates the risk of Potential Induced Degradation (PID) by eliminating leakage current paths through the backsheet, while also providing a chemical barrier. Emmvee certifies resistance to salt, acids, and ammonia — relevant for coastal and agricultural installations — as confirmed by independent third-party certification tests. ## Cons - **No BNEF Tier 1 (Bankable) Status** - Emmvee does not appear on the BloombergNEF Tier 1 list (tier\_1\_bankable: false per manufacturer data). Banks financing commercial projects above 1 MWp frequently require modules from Tier 1 manufacturers as a loan condition. The risk is marginal for residential prosumer installations; however, for business investors it may restrict access to third-party project financing. - **Monofacial Only Despite Glass-Glass Construction** - The Pearl series (is\_bifacial: false) does not leverage the dual-glass enclosure to harvest additional energy from reflected albedo. A direct competitor — the Emmvee Sapphire (545 W, glass-glass) — is bifacial and delivers 10–25% additional energy yield on reflective surfaces. Buyers paying a premium for glass-glass construction do not receive the bifaciality that peer-comparable products at this price point standardly offer. - **12-Year Product Warranty** - Given the price premium associated with glass-glass construction, a 12-year product warranty sits at the lower boundary of the industry standard (10–12 years). Premium manufacturers such as REC Alpha and SunPower offer 25-year product warranties. Should a mechanical defect occur beyond year 12, the owner bears the full cost of module replacement despite a remaining 13-year power output warranty still being in effect. ## About this series The Emmvee Pearl solar panel series defines a new standard of durability thanks to the use of advanced **glass-glass** technology, which replaces the traditional protective film, significantly extending the lifespan of the modules. This solution effectively eliminates the problem of moisture penetration and chemical corrosion, making it an ideal choice for installations exposed to harsh environmental conditions. The use of high-efficiency silicon cells allows for excellent energy yields even in diffused light, which directly addresses the problem of lower performance on cloudy days. The design of the Pearl series is characterized by **exceptional mechanical resistance**, protecting the silicon wafers from micro-cracks during extreme snowfall or strong wind gusts. Compared to standard competition, these modules stand out with **minimal annual power degradation**, which guarantees long-term financial stability for the investor. It is a product dedicated to demanding homeowners and business investors for whom **high resistance to the PID effect** and fire safety resulting from non-flammable components are key. The Pearl series is a combination of engineering precision and an aesthetic finish, ensuring reliable system operation for decades without the need for frequent service interventions. ## Notable figures - At 20.5% efficiency, this panel is on par with typical \*\*PERC 400-450W\*\* modules - Power density of 205.1 W/m² matches the \*\*PERC 400-450W\*\* median - At -0.35%/°C, hot weather performance is typical for \*\*PERC 400-450W\*\* panels - Weight of 20.0 kg (2.0 kg below \*\*PERC 400-450W\*\* median of 22.0 kg) allows easier transport and roof mounting - Ranked #11268 out of 14005 panels for efficiency in the database ## Questions ### What warranty does the Emmvee Pearl series carry and what does it cover? The Emmvee Pearl series comes with a 12-year product warranty covering material and workmanship defects, along with a 25-year linear power output warranty. After 25 years, the module is rated to retain at least 84.8% of its original nominal power. The product warranty period is shorter than that offered by Tier 1 manufacturers—who typically provide 15–25 years—so it is advisable to confirm that the installer or distributor offers additional after-sales support in the local market. ### What is the glass-glass technology used in the Pearl panels, and is it genuinely worth the premium? In the Emmvee Pearl modules, the conventional polymer backsheet is replaced with tempered glass, encapsulating the cells on both sides. This dual-glass construction virtually eliminates moisture ingress and electrochemical corrosion—the primary drivers of module degradation in humid climates. For installations exposed to heavy rainfall, fog, or aggressive environments such as agricultural sites or coastal locations, the improvement in long-term durability is significant. The trade-off is increased module weight—approximately 26 kg—which places greater demands on the roof structure. ### What is the efficiency of the Emmvee Pearl 545W panel, and is it competitive? Pearl modules rated at 545 Wp achieve a module efficiency in the range of 20.7–21.3%, with overall dimensions of 2278 × 1134 × 35 mm. This figure is in line with the market average for monocrystalline PERC half-cut modules in this power class. It does not represent the top of today's performance range—TOPCon panels routinely exceed 22–23% efficiency—but it is fully adequate for typical residential prosumer and commercial installations. ### How do the Emmvee Pearl panels perform in winter and on overcast days? The Pearl series uses mono PERC half-cut cells with a power temperature coefficient of –0.35%/°C. This means that on a cold, sunny day (e.g., –10°C) the module operates more efficiently than during summer heat. The half-cut cell design also improves energy yield under partial shading and diffuse irradiance conditions—both common in climates with frequent cloud cover. Since these are not bifacial modules, they do not benefit from additional energy reflected off snow-covered surfaces. ### Are the Emmvee Pearl panels rated for snow and wind loads—are they suitable for local rooftop conditions? The glass-glass construction gives the Pearl series exceptional mechanical rigidity. The modules are certified to IEC-compliant snow and wind load ratings, making them suitable for Central European climatic conditions. A thickness of 35 mm and a weight of 26 kg are typical for this market segment. That said, a structural assessment of the roof load capacity is recommended before installation, particularly for older buildings. ### Is Emmvee a reputable manufacturer—can the Pearl panels be trusted as a long-term investment? Emmvee Photovoltaic Power Ltd. is an Indian manufacturer with over a decade of industry experience, listed in the ENF Solar database and holding IEC certifications. The company does not appear on Bloomberg NEF's Tier 1 module manufacturer lists, which places it among smaller market participants compared to names such as LONGi, JA Solar, or Jinko Solar. For the buyer, this translates to a more competitive price point but also a lower degree of certainty regarding long-term warranty support. Purchasing through an authorized distributor that provides local service and warranty backup is strongly recommended. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/MonoPER-Half-Cut-Module-31565bf329c5.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 | Cooler, +2.6 pp, +5 yr warranty | | [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, +2.5 pp, +5 yr warranty | | [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, +2.5 pp, +5 yr warranty | | [BYD NLBK-27-450](https://comparepv.com/panel/byd-nlbk-27-450) | 450 W | +50 W, +2.5 pp, +5 yr warranty | | [Renesola RS41-450NBG-E3](https://comparepv.com/panel/renesola-rs41-450nbg-e3) | 450 W | +50 W, cooler, +2.5 pp | | [Emmvee E385HCM108-B](https://comparepv.com/panel/emmvee-e385hcm108-b) | 385 W | -15 W, -0.8 pp | | [Emmvee E390HCM108-B](https://comparepv.com/panel/emmvee-e390hcm108-b) | 390 W | -10 W, -0.5 pp | | [Emmvee E395HCM108-B](https://comparepv.com/panel/emmvee-e395hcm108-b) | 395 W | -0.3 pp | | [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 | | [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/emmvee-e400hcmw108 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.