--- title: "Heckert Solar NeMo 4.2 80 M 405 408W Solar Panel - Specs & Review | ComparePV" description: "Heckert Solar NeMo 4.2 80 M 405 408W solar panel. Specs: 20.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/heckert-solar-nemo-4-2-80-m-405-2" updated: 2026-09-11 --- # Heckert Solar NeMo 4.2 80 M 405 Middle of its segment, short guarantee 6,793 panels in the 308-508 W band, all technologies ## Identity - **Manufacturer:** Heckert Solar - **Model:** NeMo 4.2 80 M 405 - **Series:** NeMo 4.2 80 M Black Frame - **Rated power:** 408 W - **Cell technology:** Monocrystalline ## How it compares Compared against 308-508 W band, all technologies (6793 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 408 W | 435 W | Typical | | | Module efficiency | 20.80% | 21.35% | Typical | 10,457 | | Power density | 209.5 | 213.2 | Typical | 9,951 | | Temperature coefficient | -0.340 | -0.300 | Typical | 8,778 | | Weight (kg) | 21.0 kg | 23.0 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 18% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.80% | 21.35% | Typical | 10,457 | | Power density | 209.5 | 213.2 | Typical | 9,951 | | Temperature coefficient | -0.340 | -0.300 | Typical | 8,778 | | Weight per kWp | 51.5 | 53.2 | Typical | 4,845 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 18% | 9,798 | ### Watch out for - **25 year performance warranty** - Bottom 18% of the 308-508 W band, against a median of 30 yrs. - **Best for:** Residential. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 408 W - **Efficiency:** 20.80 % - **Voltage at Pmax (Vmp):** 47.44 V - **Current at Pmax (Imp):** 8.60 A - **Open-circuit voltage (Voc):** 55.05 V - **Short-circuit current (Isc):** 9.06 A - **Max system voltage:** 1000 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.263 %/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:** 209.5 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:** 310 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10457 of 14005 | | Power density | 9951 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 4845 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Manufactured exclusively in Germany** - All NeMo modules are produced at Heckert Solar's facilities in Chemnitz and Langenwetzendorf (company established in 1992). The European supply chain eliminates geopolitical risk and ensures consistent quality — a compelling differentiator against Asian-manufactured modules, where quality control can be uneven. - **80 half-cut cells, 12 busbars** - The 80-cell monocrystalline half-cut layout combined with 12 busbars reduces internal resistance and recombination losses. The result is module efficiency up to 20.8% and improved performance stability under partial shading compared to conventional 60- or 72-cell designs. - **High mechanical load resistance** - The module is certified for snow loads of 5,400 Pa and wind loads of 2,400 Pa. For Polish climatic conditions (snow load zones II–III per PN-EN 1991-1-3), this ensures full structural safety during heavy winter snowfall without requiring additional reinforcement of the mounting system. - **All-black aesthetics without power penalty** - The black anodized frame paired with a power range of 397–408 Wp positions this series among the leading aesthetically oriented residential modules on the market. Competing all-black modules of comparable output (e.g., VDS-S144/FNH, 410 Wp) do not combine that with certified European manufacturing. - **15-year product warranty + 25-year power warranty** - Heckert Solar guarantees ≥90% of rated power output for 10 years and ≥80% for 25 years, backed by the financial stability of a manufacturer with over 30 years in operation. The 15-year product warranty exceeds the standard 10–12 years offered by many Asian manufacturers in this price segment. ## Cons - **PERC — a maturing technology losing ground** - The direct peer competitor Luxor Solar M108 achieves 21.33% efficiency using N-type TOPCon technology, surpassing this series' peak of 20.8% by 0.5 percentage points. Furthermore, TOPCon exhibits a superior temperature coefficient (−0.31%/°C vs. −0.38%/°C for PERC), which in Polish climatic conditions — where peak irradiance coincides with high ambient temperatures — translates to approximately 0.5–0.7% lower annual energy yield. - **Monofacial only — no bifacial option** - The series is strictly monofacial, whereas the competing Luxor Solar M108 in a similar power class is available in a bifacial glass-glass configuration, offering a potential 5–15% gain in energy yield when installed over a high-albedo surface (e.g., white roofing membrane, gravel). For ground-mount or flat-roof installations, this represents a measurable loss of generation potential. ## About this series The Heckert Solar NeMo 4.2 80 M Black Frame series is an advanced solution that redefines performance standards on limited roof areas. The use of an **innovative layout of 80 monocrystalline cells** allows for the optimization of electrical parameters, which translates into more stable inverter operation even under variable sunlight. These panels eliminate the problem of choosing between aesthetics and power, offering an elegant black frame finish while maintaining the highest standards of **Made in Germany production**. This is a key differentiator for investors who value supply chain security and rigorous quality control. Thanks to the use of 11-busbar technology, the modules exhibit minimal energy losses and excellent resistance to the PID phenomenon. Exceptional mechanical strength makes it an ideal choice for buildings exposed to harsh weather conditions, such as strong winds or heavy snow. By choosing this series, you gain **maximum power density per square meter**, which is a priority when designing residential prosumer installations. The solid frame construction facilitates installation and guarantees longevity, placing these panels ahead of Asian competition in terms of **durability and a low carbon footprint**. This is an investment in technology that combines environmental care with real energy gain for decades. ## Notable figures - Module efficiency of 20.8% is 1.0pp below average for \*\*database\*\* panels (median: 21.8%) - Power density of 209.4 W/m² is 8.7 W/m² below \*\*database\*\* median (218.1 W/m²) - needs more roof space - At -0.34%/°C, loses 0.04pp more power per degree than \*\*database\*\* median (-0.30%/°C) - Weight of 21.0 kg (5.5 kg below \*\*database\*\* median of 26.5 kg) allows easier transport and roof mounting - In the top 75% for efficiency among all N-type panels ## Questions ### What are the product and power output warranties for the Heckert Solar NeMo 4.2 80 M Black Frame series? The NeMo 4.2 80 M Black Frame series comes with a 15-year manufacturer product warranty and a 25-year linear power output warranty. After 25 years of operation, the module is guaranteed to retain at least 80% of its rated output. This is one of the stronger warranty packages in the Made in Germany segment, reflecting Heckert Solar's confidence in the long-term stability of the PERC cell technology used in these modules. ### What is PERC technology and what real-world advantages does it offer in the Heckert Solar NeMo 4.2 80 M? PERC (Passivated Emitter and Rear Cell) is a monocrystalline cell technology that adds a passivation layer to the rear of each cell, reflecting unabsorbed photons back for a second absorption pass. In practice this delivers higher efficiency than conventional BSF cells, better output under diffuse irradiance and elevated temperatures, and excellent resistance to PID degradation. Combined with the 80-cell half-cut layout and multi-busbar design, the NeMo 4.2 80 M series minimizes power losses under partial shading. ### Can the NeMo 4.2 80 M Black Frame panels handle heavy snow loads and strong winds on a typical roof? Yes, the NeMo 4.2 80 M Black Frame is engineered for demanding climatic conditions. The modules withstand snow loads up to 5400 Pa and wind pressure up to 2400 Pa, meeting structural requirements for the vast majority of locations in Poland and Central Europe. An additional advantage is certification for salt spray resistance (IEC 61701) and ammonia resistance (IEC 62716), making the panels well-suited for coastal and agricultural installations. ### Does the black frame on the NeMo 4.2 80 M Black Frame reduce efficiency compared to a standard silver frame? No, the black anodized frame is primarily an aesthetic feature — the module blends seamlessly into dark roof surfaces without disrupting the building's appearance. Cell efficiency is unaffected and reaches up to approximately 20.8% for the variant with a peak power of ~408 Wp. The aluminum alloy frame simultaneously provides high mechanical strength with no compromise to electrical performance. ### Where are Heckert Solar NeMo 4.2 80 M panels manufactured and why does it matter when buying? Heckert Solar NeMo 4.2 80 M panels are manufactured in Germany at facilities in Chemnitz and Langenwetzendorf, powered entirely by renewable electricity. Made in Germany status means rigorous quality control at every production stage and a shorter supply chain compared to Asian-sourced modules. For the end customer this translates to lower warranty claim risk, predictable long-term durability, and a significantly lower carbon footprint for the entire installation. ### What are the dimensions of the NeMo 4.2 80 M Black Frame panels and will they fit a standard pitched roof? The NeMo 4.2 80 M Black Frame modules measure approximately 1736×1122 mm and weigh around 20–21 kg, making them compatible with standard racking systems for pitched roofs. The compact 80-cell half-cut layout delivers up to approximately 408 Wp within a relatively small footprint, which is particularly advantageous for residential prosumer installations where roof space is limited. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/DB-NeMo-42-80-M_Black_Frame_395-405-2a709f2fbf0a.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-455-MAH54Db](https://comparepv.com/panel/aiko-aiko-455-mah54db) | 455 W | Cooler, +2.5 pp, +5 yr warranty | | [Longi Solar LR5-54HTH-455M](https://comparepv.com/panel/longi-lr5-54hth-455m) | 455 W | +47 W, cooler, +2.5 pp | | [Yingli YL455CF54 e/2](https://comparepv.com/panel/yingli-yl455cf54-e-2) | 455 W | Cooler, +2.5 pp, +5 yr warranty | | [Einnova Solarline ESM-455T](https://comparepv.com/panel/einnova-solarline-esm-455t) | 455 W | +47 W, +2.5 pp, +5 yr warranty | | [SunEvo Solar SE5-54HBC-455W](https://comparepv.com/panel/sunevo-solar-se5-54hbc-455w) | 455 W | +47 W, cooler, +2.5 pp | | [Just Solar JST-EDMH-(445-465)W-TD (455W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-455w-class) | 455 W | +47 W, +2.5 pp, +5 yr warranty | | [Luxor Solar LX-455M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-455m-182r-96-gg) | 455 W | Cooler, +2.5 pp, +5 yr warranty | | [Heckert Solar NEMO® 4.1 80 M 385](https://comparepv.com/panel/heckert-solar-nemo-4-1-80-m-385) | 385 W | -23 W, -1.0 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 | -18 W, -0.7 pp | | [Heckert Solar NeMo® 4.2 80 M 390](https://comparepv.com/panel/heckert-solar-nemo-4-2-80-m-390) | 392 W | -16 W, -0.7 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +102 W, cooler, +4.2 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +87 W, cooler, +4.0 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +97 W, cooler, +3.9 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +82 W, cooler, +3.7 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +92 W, cooler, +3.7 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +92 W, cooler, +3.7 pp | --- Source: https://comparepv.com/panel/heckert-solar-nemo-4-2-80-m-405-2 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.