--- title: "Heckert Solar NEMO 4.2 80M BLACK 400 400W Solar Panel - Specs & Review | ComparePV" description: "Heckert Solar NEMO 4.2 80M BLACK 400 400W solar panel. Specs: 20.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/heckert-solar-nemo-4-2-80m-black-400" updated: 2026-09-11 --- # Heckert Solar NEMO 4.2 80M BLACK 400 Middle of its segment, short guarantee 6,519 panels in the 300-500 W band, all technologies ## Identity - **Manufacturer:** Heckert Solar - **Model:** NEMO 4.2 80M BLACK 400 - **Series:** NEMO 4.2 80M Black - **Rated power:** 400 W - **Cell technology:** Monocrystalline ## How it compares Compared against 300-500 W band, all technologies (6519 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 400 W | 435 W | Weak - bottom 24% | | | Module efficiency | 20.50% | 21.30% | Typical | 11,308 | | Power density | 205.4 | 212.6 | Typical | 11,215 | | 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 | 20.50% | 21.30% | Typical | 11,308 | | Power density | 205.4 | 212.6 | Typical | 11,215 | | Temperature coefficient | -0.340 | -0.300 | Typical | 8,778 | | Weight per kWp | 52.5 | 53.2 | Typical | 6,043 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 19% | 9,798 | ### Watch out for - **25 year performance warranty** - Bottom 19% of the 300-500 W band, against a median of 30 yrs. - **Best for:** Residential and commercial. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 400 W - **Efficiency:** 20.50 % - **Voltage at Pmax (Vmp):** 47.04 V - **Current at Pmax (Imp):** 8.56 A - **Open-circuit voltage (Voc):** 54.81 V - **Short-circuit current (Isc):** 9.03 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:** 205.4 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:** 304 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 11308 of 14005 | | Power density | 11215 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 6043 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Half-cut G12 cells with 12 busbars** - Half-cut G12 cells with 12 busbars improve current distribution and reduce losses under partial shading, translating into higher real-world energy yield (e.g., partial shading from chimneys or antennas). - **Compact format at high power output** - The 80-cell module (1736x1122 mm) reaches up to 405 Wp, delivering higher power density than standard 108-cell modules of comparable power (e.g., EGing STAR or VSUN405-108BMH-DG), making it easier to fit smaller residential roof areas. - **microCELL TLS technology reduces microcracks** - The proprietary thermal laser separation (microCELL TLS) process minimizes microcrack risk during manufacturing, resulting in lower long-term power degradation. - **German manufacturing powered by in-house PV** - Panels are produced exclusively at Heckert Solar's German facilities (in business since 1992), powered by the company's own PV installations, reducing the manufacturing carbon footprint compared to Asian-based competitors dominating the segment. - **Certified salt-mist and ammonia corrosion resistance** - Verified under IEC 61701 and IEC 62716 certifications, corrosion resistance allows safe installation in coastal areas and agricultural settings where standard modules degrade faster. ## Cons - **15-year product warranty below market trend** - The 15-year product warranty is shorter than the 25-30 year warranties now offered by leading Asian manufacturers (e.g., JinkoSolar, Trina Solar, LONGi), a relevant factor for investors comparing total lifecycle risk. - **No confirmed BNEF Tier 1 status** - As a niche German manufacturer with limited production scale, Heckert Solar does not clearly appear on the current BNEF Tier 1 list (Q1 2026), which is dominated by large-scale Asian producers — potentially a constraint for bank-financed projects requiring Tier 1 qualification. ## About this series The NeMo 4.2 80M Black series is designed for those who expect a solar installation to deliver not only high efficiency but also an aesthetic that suits modern roof architecture. The module is built around **half-cut G12 cells with 12 busbars**, which improves current distribution and reduces losses under partial shading. Mechanical durability is ensured by the proprietary **microCELL TLS technology**, a thermal laser separation process that limits microcracks and protects the panel from degradation over time. The fully black frame and backsheet give the module an **elegant, uniform appearance** that blends seamlessly with dark roof coverings, making it a popular choice for residential installations. Another advantage is its **resistance to salt mist and ammonia corrosion**, confirmed by IEC 61701 and IEC 62716 certification, making the panel suitable for both coastal regions and agricultural environments. Production takes place exclusively in Germany, powered by electricity from the manufacturer's own PV plants, and the module comes with a **25-year performance warranty**, giving investors confidence in stable long-term returns. ## Notable figures - At 20.5% efficiency, this panel is 1.3pp below the \*\*database\*\* median of 21.8% - At 205.4 W/m², this panel generates 12.7 W/m² less per unit area than \*\*database\*\* median (218.1 W/m²) - Temperature coefficient of -0.34%/°C is 0.04pp worse than \*\*database\*\* median (-0.30%/°C) - higher losses in summer heat - Weight of 21.0 kg (5.5 kg below \*\*database\*\* median of 26.5 kg) allows easier transport and roof mounting - #11308 for efficiency, #8778 for temperature performance out of 14005 panels ## Questions ### What is the maximum power output of the NeMo 4.2 80M Black panel and who is it best suited for? Modules in the NeMo 4.2 80M Black series reach up to 405 Wp. This makes them a strong fit for single-family homes, where both efficiency and limited roof space matter. Thanks to half-cut G12 cells with 12 busbars, the panel makes efficient use of available surface area, delivering higher energy yield per module than older cell designs. ### Does the black color of the NeMo 4.2 80M Black panel affect its performance? The fully black frame and backsheet are primarily an aesthetic choice, matched to dark roof coverings, but they do result in a slightly higher operating temperature than white-backsheet versions. The manufacturer offsets this with half-cut cell technology, which reduces energy losses and helps maintain stable output even at elevated panel temperatures. ### What is microCELL TLS technology, and does it actually extend panel lifespan? microCELL TLS is Heckert Solar's proprietary method of thermal laser separation of cells, used instead of mechanical cutting. This reduces the risk of microcracks in the silicon that can occur during manufacturing and transport, leading to less power degradation over time. In practice, this means greater resistance to mechanical damage and more stable system performance throughout the panel's service life. ### Are NeMo 4.2 80M Black panels suitable for coastal installations or agricultural buildings? Yes, the module holds IEC 61701 certification for salt mist corrosion resistance and IEC 62716 for ammonia resistance, confirming its suitability for both coastal areas exposed to salty air and agricultural settings where ammonia fumes from livestock are present. This level of resistance is uncommon in standard panels within this price class. ### What warranty covers the NeMo 4.2 80M Black panels, and what exactly does it include? The manufacturer provides a 15-year product warranty covering material and workmanship defects, plus a 25-year linear performance warranty guaranteeing a minimum power output level over time. This is standard for premium panels and gives investors confidence that the installation will deliver predictable energy returns throughout its operational life. ### Are Heckert Solar NeMo 4.2 80M Black panels manufactured in Germany, and does that affect quality? Yes, production takes place exclusively in Germany, using electricity generated by the manufacturer's own PV installations. This means strict quality control at every production stage and compliance with rigorous European environmental standards, a factor many buyers consider a real quality advantage rather than just a marketing point when choosing premium panels. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/DB-NeMo-42-80-M-Black_390-405-a8faacc73263.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, +2.6 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 | | [Heckert Solar NEMO® 4.1 80 M 385](https://comparepv.com/panel/heckert-solar-nemo-4-1-80-m-385) | 385 W | -15 W, -0.7 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 | -10 W, -0.4 pp | | [Heckert Solar NeMo® 4.2 80 M 390](https://comparepv.com/panel/heckert-solar-nemo-4-2-80-m-390) | 392 W | -0.4 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/heckert-solar-nemo-4-2-80m-black-400 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.