--- title: "Heckert Solar NeMo 4.2 80 M Black 395 397W Solar Panel - Specs & Review | ComparePV" description: "Heckert Solar NeMo 4.2 80 M Black 395 397W solar panel. Specs: 20.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/heckert-solar-nemo-4-2-80-m-black-395-1" updated: 2026-09-11 --- # Heckert Solar NeMo 4.2 80 M Black 395 Middle of its segment, short guarantee 6,519 panels in the 297-497 W band, all technologies ## Identity - **Manufacturer:** Heckert Solar - **Model:** NeMo 4.2 80 M Black 395 - **Series:** NeMo 4.2 80 M Black - **Rated power:** 397 W - **Cell technology:** Monocrystalline ## How it compares Compared against 297-497 W band, all technologies (6519 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 397 W | 435 W | Weak - bottom 22% | | | Module efficiency | 20.30% | 21.30% | Weak - bottom 25% | 11,769 | | Power density | 203.8 | 212.6 | Typical | 11,639 | | Temperature coefficient | -0.340 | -0.300 | Typical | 8,778 | | Weight (kg) | 21.0 kg | 22.5 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 19% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.30% | 21.30% | Weak - bottom 25% | 11,769 | | Power density | 203.8 | 212.6 | Typical | 11,639 | | Temperature coefficient | -0.340 | -0.300 | Typical | 8,778 | | Weight per kWp | 52.9 | 53.2 | Typical | 6,610 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 19% | 9,798 | ### Watch out for - **25 year performance warranty** - Bottom 19% of the 297-497 W band, against a median of 30 yrs. - **20.30% module efficiency** - Bottom 25% of the 297-497 W band, against a median of 21.30%. - **Best for:** Residential, shaded-installations and cold-climate. - **Not ideal for:** Owners who want a long output guarantee and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 397 W - **Efficiency:** 20.30 % - **Voltage at Pmax (Vmp):** 46.65 V - **Current at Pmax (Imp):** 8.52 A - **Open-circuit voltage (Voc):** 54.57 V - **Short-circuit current (Isc):** 8.99 A - **Max system voltage:** 1000 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.262 %/degC - **Temperature coefficient of Isc:** 0.037 %/degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell count:** 80 ### Physical - **Length:** 1736 mm - **Width:** 1122 mm - **Thickness:** 35 mm - **Weight:** 21.0 kg - **Area:** 1.95 m2 - **Power density:** 203.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 80.0 % - **Output after 30 years:** 302 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 11769 of 14005 | | Power density | 11639 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 6610 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Manufactured Exclusively in Germany** - All NeMo 4.2 modules are produced at Heckert Solar's facilities in Chemnitz (Saxony) and Langenwetzendorf (Thuringia), with a combined annual capacity of ~800 MWp. The short supply chain reduces the carbon footprint and logistical risk compared with modules shipped from East Asia. - **TÜV, IEC 61215, and IEC 61701 Certified** - The series holds IEC 61215 and IEC 61730 certifications and has passed the salt mist corrosion test per IEC 61701, confirming resilience under harsh environmental conditions. This certification is a prerequisite for installations near coastlines or industrial areas. - **G12 Half-Cut Cells with 12 Busbars** - The half-cut cell architecture (80 cells, 12 busbars) reduces resistive losses and mitigates the impact of partial shading. Under identical irradiance conditions, the module maintains higher energy yield than conventional full-cell designs. - **5400/2400 Pa Mechanical Load Rating** - The module withstands snow loads up to 5400 Pa and wind loads up to 2400 Pa, exceeding the EN 1991-1-3 requirements for the majority of Polish sites and making it well suited for installations in mountainous regions of the country. - **Full-Black Aesthetics for Dark Roofing** - The black frame and black backsheet create a uniform appearance that blends seamlessly with dark roof surfaces such as ceramic tile, slate, and bituminous shingles. This is a significant advantage for homeowners and investors for whom façade aesthetics are a priority. ## Cons - **Lower Efficiency Than Competing TOPCon Modules** - The series peaks at 20.8% efficiency, compared with 21.33% for the Luxor Solar Eco Line N-type TOPCon and 21.0% for the Sunket SKT410–430M10-108D4. On an equivalent roof area, this translates to a tangible installed-power deficit of approximately 1–2% per m². - **PERC Technology, Not N-Type TOPCon** - The cells in this series are based on PERC technology, which exhibits higher LID (Light Induced Degradation) rates and inferior high-temperature performance compared with the N-type TOPCon cells used by certain peer comparables such as Luxor Solar. Over a multi-year horizon, this results in a modestly lower cumulative energy yield. - **Monofacial Design — No Bifacial Gain** - The NeMo 4.2 80 M Black is a monofacial module and therefore cannot harvest reflected irradiance (albedo). On highly reflective surfaces such as gravel, EPDM membrane, or snow, it forgoes the additional 5–15% yield gain that bifacial alternatives in the same power class can deliver. ## About this series The Heckert Solar NeMo 4.2 80 M Black series consists of advanced photovoltaic modules that combine uncompromising aesthetics with the highest European manufacturing quality. The use of innovative monocrystalline cells and **Half-Cut cell technology** allows for a significant reduction in internal losses and more efficient operation in partial shading conditions. These panels are distinguished by exceptional mechanical pressure resistance, making them an ideal choice for regions exposed to extreme snowfall or strong wind gusts. Thanks to the **elegant Full Black finish**, the installation becomes almost invisible on dark roof surfaces, effectively solving the aesthetic issue often overlooked in the case of standard modules. This is a product created for demanding investors who expect not only high energy yields but also **environmentally sustainable production** in modern, local facilities. What sets this series apart from Far Eastern competition is, above all, **rigorous quality control standards** and a significantly shorter transport route, which minimizes the carbon footprint of the entire project. By choosing these panels, you gain the certainty of stable system operation for decades, which translates into **maximum investment security** for a home solar power plant. ## Notable figures - At 20.3% efficiency, this panel is 1.5pp below the \*\*database\*\* median of 21.8% - 204.1 W/m² power density is 14.0 W/m² below \*\*database\*\* median (218.1 W/m²) - requires larger installation area - -0.34%/°C temperature coefficient - 0.04pp worse than \*\*database\*\* median (-0.30%/°C), expect higher hot weather losses - At 21.0 kg, this panel is 5.5 kg lighter than \*\*database\*\* median (26.5 kg) - easier handling during installation - #11769 for efficiency, #8778 for temperature performance out of 14005 panels ## Questions ### What warranty does the Heckert Solar NeMo 4.2 80 M Black come with? Heckert Solar backs the NeMo 4.2 80 M Black with a 15-year product warranty covering workmanship defects, plus a 25-year linear power output warranty. After 25 years, the module must retain the manufacturer-specified percentage of its original 407.96 Wp peak power. Two separate warranties are a hallmark of premium European manufacturers and a meaningful advantage over many competing products from Asian suppliers. ### Will the NeMo 4.2 80 M Black perform well on a roof with chimneys or dormers? Yes. The NeMo 4.2 80 M Black uses a half-cut cell design with 80 G12 cells, splitting the module into two independent electrical halves. Partial shading from a chimney or dormer window only reduces output in the affected section. Combined with 4 bypass diodes, this results in noticeably higher energy yields compared to conventional 60- or 72-cell modules when partial shading is present. ### Is the Heckert Solar NeMo 4.2 80 M Black really manufactured in Germany? Yes. Heckert Solar manufactures all NeMo series modules exclusively at its German facilities in Chemnitz and Langenwetzendorf, powered by in-house PV systems and purchased green electricity. For buyers, this means shorter shipping distances, a lower product carbon footprint, and full quality control under strict European manufacturing standards. ### How much does the NeMo 4.2 80 M Black weigh, and will a standard roof structure support it? Each NeMo 4.2 80 M Black panel weighs approximately 21 kg with dimensions of 1736 x 1122 x 35 mm. Standard sloped-roof mounting systems are rated for loads well above this figure. The module is also certified for resistance to extreme snow loads and high wind pressure, making it a safe choice for harsh Central European weather conditions. ### How does the Full Black finish of the NeMo 4.2 80 M Black differ from the standard silver-frame version? In the Black version, the aluminum frame, backsheet, and busbar grid are all uniform matte black. On dark roof tiles or bitumen shingles, the array is nearly invisible, which matters for installations in heritage-protected areas or for homeowners who prioritize aesthetics. The electrical performance difference between the Black and standard silver-frame variants is negligible. ### Is the NeMo 4.2 80 M Black a bifacial module, and can it be used in a ground-mount system? No, the NeMo 4.2 80 M Black is not a bifacial module. It has an opaque backsheet and generates power from the front surface only. Ground-mount installation is technically straightforward, but you will not benefit from the albedo gain that bifacial modules offer. The series is optimized primarily for rooftop installations where the Full Black aesthetic delivers the most value. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/db-nemo-4-2-80-m-black-390-405-9f5bde897c72.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, +2.8 pp, +5 yr warranty | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | Lighter, +2.7 pp, +5 yr warranty | | [Gamko New Energy GKA210M380W (1/4\*4\*38)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-4-4-38) | 380 W | Lighter, +2.7 pp, +5 yr warranty | | [Gamko New Energy GKA210M400W (1/2\*4\*20)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-2-4-20) | 400 W | Lighter, +2.7 pp, +5 yr warranty | | [Gamko New Energy GKA210M400W (1/4\*4\*40)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-4-4-40) | 400 W | Lighter, +2.7 pp, +5 yr warranty | | [Gamko New Energy GKA210M380W (1/2\*4\*19)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-2-4-19) | 380 W | Lighter, +2.7 pp, +5 yr warranty | | [Jetion JT440SYK(B)](https://comparepv.com/panel/jetion-jt440syk-b) | 440 W | Cooler, +2.6 pp, +5 yr warranty | | [Luxor Solar LX-440M/182-108+](https://comparepv.com/panel/luxor-solar-lx-440m-182-108) | 440 W | +43 W, cooler, +2.6 pp | | [Heckert Solar NEMO® 4.1 80 M 385](https://comparepv.com/panel/heckert-solar-nemo-4-1-80-m-385) | 385 W | -12 W, -0.5 pp | | [Heckert Solar NeMo® 4.2 80 M BLACK 390](https://comparepv.com/panel/heckert-solar-nemo-4-2-80-m-black-390) | 390 W | Very close match | | [Heckert Solar NeMo® 4.2 80 M 390](https://comparepv.com/panel/heckert-solar-nemo-4-2-80-m-390) | 392 W | Very close match | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +113 W, cooler, +4.7 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +98 W, cooler, +4.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +108 W, cooler, +4.4 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +93 W, cooler, +4.2 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +103 W, cooler, +4.2 pp | --- Source: https://comparepv.com/panel/heckert-solar-nemo-4-2-80-m-black-395-1 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.