--- title: "DMEGC DM420M10T-54HBB 420W Solar Panel - Specs & Review | ComparePV" description: "DMEGC DM420M10T-54HBB 420W solar panel. Specs: 21.51% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dmegc-dm420m10t-54hbb" updated: 2026-09-11 --- # DMEGC DM420M10T-54HBB Middle of its segment, weak in heat 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** DMEGC - **Model:** DM420M10T-54HBB - **Series:** DMXXXM10T-54HBB - **Rated power:** 420 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 400-450 W (1218 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 420 W | 435 W | Weak - bottom 16% | | | Module efficiency | 21.51% | 22.00% | Weak - bottom 20% | 7,894 | | Power density | 215.1 | 220.2 | Weak - bottom 19% | 7,882 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 10% | 8,005 | | Weight (kg) | 21.2 kg | 22.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.51% | 22.00% | Weak - bottom 20% | 7,894 | | Power density | 215.1 | 220.2 | Weak - bottom 19% | 7,882 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 10% | 8,005 | | Weight per kWp | 50.5 | 51.4 | Typical | 3,854 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.310 %/°C temperature coefficient** - Bottom 10% of the TOPCon 400-450 W segment, against a median of -0.290. - **215.1 watts per square metre** - Bottom 19% of the TOPCon 400-450 W segment, against a median of 220.2. - **21.51% module efficiency** - Bottom 20% of the TOPCon 400-450 W segment, against a median of 22.00%. - **Best for:** Residential and hot-climate. - **Not ideal for:** Hot climates, roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 420 W - **Efficiency:** 21.51 % - **Voltage at Pmax (Vmp):** 32.01 V - **Current at Pmax (Imp):** 13.14 A - **Open-circuit voltage (Voc):** 38.39 V - **Short-circuit current (Isc):** 13.78 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.310 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.060 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 21.2 kg - **Area:** 1.95 m2 - **Power density:** 215.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 20 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:** 367 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7894 of 14005 | | Power density | 7882 of 14005 | | Temperature coefficient | 8005 of 14005 | | Weight | 3854 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type TOPCon Technology** - N-type TOPCon cells exhibit an annual degradation rate of ≤0.4%/year (from year 2 onward), whereas PERC modules typically degrade at 0.5–0.55%/year. This translates into meaningfully higher cumulative energy yield over a 25–30-year project horizon with no increase in installation costs. - **30-Year Linear Power Warranty** - The manufacturer guarantees ≥87.4% of nominal power output after 30 years (max degradation 0.4%/year from year 2, ≥98% after year 1). The residential segment market standard for many suppliers is 25 years — this series provides 5 additional years of coverage at no extra cost. - **Efficiency at the Top of Its Segment** - The peak efficiency of 22.02% places this series on par with best-in-class peers — VSUN N-108MH-BW (22.02%) and SunLink SL5M108 (22.00%) — and clearly ahead of the Silfab Elite (21.4%). For rooftops with limited available area, the 0.6 percentage-point advantage over Silfab translates to approximately 12–16 W of additional power per module with no change in physical dimensions. - **Full Black — Premium Residential Aesthetics** - The combination of black cells, black frame, and black backsheet eliminates the visually contrasting silver elements. In the residential segment, this is often a decisive purchasing criterion — particularly on roofs with dark ceramic tiles or metal roofing. - **Bankability: BNEF Tier 1 + Kiwa PVEL Top Performer 2025** - DMEGC has maintained BNEF Tier 1 status across 6 consecutive qualification periods (through Q3 2025 inclusive) and was awarded the PV Module Top Performer 2025 designation in independent Kiwa PVEL testing. This ensures module acceptance by financing institutions and reduces risk for installers in the event of warranty claims. ## Cons - **20-Year Product Warranty vs. 25 Years in the Newer Generation** - The DMXXXM10T-54HBB series carries a 20-year product warranty, while DMEGC's next-generation lineup — Infinity RT (DMxxxM10RT-54HBB, available since 2024) — raises this to 25 years at a comparable price point and a higher power range of 430–450 W. Buyers comparing options in 2025–2026 may view this series as less competitive on a price-to-value basis against its own successor. ## About this series Photovoltaic panels from the DMXXXM10T-54HBB series represent a technologically advanced solution based on innovative **N-type TOPCon architecture**. The use of this technology allows for achieving significantly higher solar energy conversion efficiency and minimizing power degradation over time, which guarantees stable yields for decades. This series stands out with its unique **Full Black** design, which integrates black cells with a black frame and black backsheet. This allows the modules to blend perfectly with modern architecture, eliminating the problem of unsightly silver elements on the roof surface. A key benefit for the user is the **excellent temperature coefficient**, making the system work more efficiently in conditions of high sunlight and summer heat. The design based on 54 cells in the M10 format ensures optimal dimensions and weight, which facilitates safe installation on roofs with limited load capacity or complex shapes. By choosing these modules, the investor receives a product with **low susceptibility to micro-cracks** and high mechanical resistance. This is a proposal dedicated primarily to the residential sector, where combining high power density with an exceptional design that distinguishes this series from standard, mass-market products available on the market is of key importance. ## Notable figures - Efficiency of 21.5% matches the \*\*TOPCon 400-450W\*\* median - Power density of 215.1 W/m² is 5.1 W/m² below \*\*TOPCon 400-450W\*\* median (220.2 W/m²) - needs more roof space - Temperature coefficient of -0.31%/°C is 0.02pp worse than \*\*TOPCon 400-450W\*\* median (-0.29%/°C) - higher losses in summer heat - Ranked #7894 out of 14005 panels for efficiency in the database ## Questions ### What is the N-type TOPCon technology used in DMEGC DMXXXM10T-54HBB panels, and why is it superior to the widely used P-type? N-type TOPCon (Tunnel Oxide Passivated Contact) technology employs silicon cells with reversed polarity and an additional passivation layer that minimizes charge carrier recombination losses. In practice, this translates to higher conversion efficiency than standard P-type PERC cells, a lower annual degradation rate (approximately 0.4% per year versus an average of 0.7% for PERC), and improved performance under elevated temperature conditions and low-irradiance environments. ### Do the DMEGC DMXXXM10T-54HBB panels in the Full Black version look good on a residential rooftop? Yes, the DMXXXM10T-54HBB series is a Full Black offering in which the cells, frame, and backsheet are uniformly black. Once installed, no silver elements or contrasting edges are visible, allowing the array to blend seamlessly into the roof surface and complement modern or dark-colored facades. It is one of the few series in the 430 W segment to deliver this level of aesthetics while simultaneously meeting the performance standards of N-type technology. ### What warranty does DMEGC offer on the DMXXXM10T-54HBB series panels? The manufacturer provides a 20-year product warranty covering physical defects and material failures, along with a 30-year linear power output warranty. Under its terms, annual degradation after the first year must not exceed 0.4%, and after 30 years the module must retain at least 87.4% of its nominal power output. DMEGC is a Tier 1 manufacturer certified to ISO 9001, which provides additional assurance that warranty claims will be honored. ### Do the DMEGC DMXXXM10T-54HBB panels suffer significant power loss on hot summer days? Thanks to N-type TOPCon technology, the DMXXXM10T-54HBB series features a favorable temperature coefficient of approximately -0.30%/°C, whereas standard P-type PERC modules typically reach -0.35 to -0.40%/°C. This means that at a cell temperature of around 65°C — typical during sunny summer days in Poland — actual power loss is several percentage points lower compared to PERC panels of the same nominal power rating. ### Are the DMEGC DMXXXM10T-54HBB panels suitable for roofs with limited load-bearing capacity or complex shapes? The DMXXXM10T-54HBB series is built around 54 M10-format cells in a half-cut configuration, resulting in overall dimensions of approximately 1762 × 1134 × 30 mm and a weight of about 20.6 kg. These are compact dimensions for a 430 W module, facilitating safe transport across the roof surface and installation on structures with limited load-bearing capacity. The smaller module footprint also provides greater flexibility on roofs featuring chimneys, dormers, or variable pitch sections. ### Is DMEGC a reliable photovoltaic panel manufacturer, and is the brand present in Poland? DMEGC Solar is a Chinese manufacturer ranked Tier 1 by BloombergNEF, operating since 1980, with an annual production capacity exceeding 10 GW. The company has earned the Top Brand PV Modules designation awarded by EUPD Research for six consecutive years (since 2018), including in the European edition. DMEGC panels are available through Polish renewable energy distributors and installers, and Tier 1 status signifies bankability — meaning acceptance by financial institutions funding photovoltaic projects. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/6596691717ab6-d597715615bb.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Just Solar JST-EDMH-(445-465)W-TD (465W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-465w-class) | 465 W | +45 W, cooler, +2.3 pp | | [Luxor Solar LX-465M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-465m-182r-96-gg) | 465 W | +45 W, cooler, +2.3 pp | | [Maxeon SPR-MAX7-470](https://comparepv.com/panel/maxeon-spr-max7-470) | 470 W | +50 W, +2.2 pp, +10 yr warranty | | [AIKO AIKO-A470-MAH54Mb](https://comparepv.com/panel/aiko-aiko-a470-mah54mb) | 470 W | +50 W, cooler, +2.1 pp | | [AIKO AIKO-A460-MAH54Mb](https://comparepv.com/panel/aiko-shenzhen-aiko-digital-energy-technology-co-ltd-aiko-a460-mah54mb-1) | 460 W | +40 W, cooler, +2.1 pp | | [TCL Zhonghuan HSM-BD54-LA470](https://comparepv.com/panel/tcl-zhonghuan-hsm-bd54-la470) | 470 W | +50 W, cooler, +2.1 pp | | [DMEGC DM415M10T-54HBB](https://comparepv.com/panel/dmegc-dm415m10t-54hbb) | 415 W | -0.3 pp | | [DMEGC DM425M10T-B54HBT-U4](https://comparepv.com/panel/dmegc-solar-hengdian-group-dm425m10t-b54hbt-u4) | 425 W | Cooler, heavier, +0.3 pp | | [DMEGC DM430M10T-B54HBT-U](https://comparepv.com/panel/dmegc-solar-hengdian-group-dm430m10t-b54hbt-u) | 430 W | Cooler, heavier, +0.5 pp | | [DMEGC DM435M10T-B54HBT-U](https://comparepv.com/panel/dmegc-solar-hengdian-group-dm435m10t-b54hbt-u) | 435 W | Cooler, heavier, +0.8 pp | | [DMEGC DM440M10T-B54HBT-U](https://comparepv.com/panel/dmegc-solar-hengdian-group-dm440m10t-b54hbt-u) | 440 W | Cooler, heavier, +1.0 pp | | [DMEGC DM445M10T-B54HBT-U](https://comparepv.com/panel/dmegc-solar-hengdian-group-dm445m10t-b54hbt-u) | 445 W | +25 W, heavier, +1.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +90 W, cooler, +3.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +75 W, cooler, +3.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +85 W, cooler, +3.2 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +70 W, cooler, +3.0 pp | --- Source: https://comparepv.com/panel/dmegc-dm420m10t-54hbb Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.