--- title: "Heckert Solar NEMO® 4.280 M BLACK FRAME 405Wp 408W Solar Panel - Specs & Review | ComparePV" description: "Heckert Solar NEMO® 4.280 M BLACK FRAME 405Wp 408W solar panel. Specs: 20.80% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/heckert-solar-nemo-4-280-m-black-frame-405wp" updated: 2026-09-11 --- # Heckert Solar NEMO® 4.280 M BLACK FRAME 405Wp Strong in heat, no clear weak spot 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Heckert Solar - **Model:** NEMO® 4.280 M BLACK FRAME 405Wp - **Series:** NEMO® 4.280 M BLACK FRAME - **Rated power:** 408 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) | 408 W | 410 W | Typical | | | Module efficiency | 20.80% | 20.60% | Typical | 10,457 | | Power density | 209.5 | 206.2 | Typical | 9,951 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 24% | 8,778 | | Weight (kg) | 21.0 kg | 22.0 kg | Typical | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.80% | 20.60% | Typical | 10,457 | | Power density | 209.5 | 206.2 | Typical | 9,951 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 24% | 8,778 | | Weight per kWp | 51.5 | 53.0 | Typical | 4,845 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Strengths - **-0.340 %/°C temperature coefficient** - Top 24% of the PERC 400-450 W segment, against a median of -0.350. - **Best for:** Residential, commercial and shaded-installations. ## 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 technology:** PERC - **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 - **Last Continuously Operating Made-in-Germany Manufacturer** - As of 2024, Heckert Solar is the only PV module manufacturer with an uninterrupted production facility on German soil — Solarwatt ceased manufacturing in Dresden in August 2024, and Meyer Burger halted operations in Freiberg in April 2024. This translates into the lowest carbon footprint in the segment and full supply chain control. - **11-Busbar Half-Cut Cell Design (80 Cells)** - The 80-cell half-cut format with 11 busbars reduces internal resistance and limits partial-shading losses compared to legacy 9-busbar modules. Splitting each cell in half halves the operating current, which decreases resistive heating losses and improves energy yield under diffuse irradiance conditions. - **Mechanical Load Rating: 5400 Pa (Snow) / 2400 Pa (Wind)** - Ratings are validated by a tested front load of 8100 Pa, exceeding the standard IEC 61215 requirements. For the Polish climate — where snow loads in zone III reach 2.0 kN/m² (≈2000 Pa) — this represents more than twice the required structural safety margin. - **TÜV Certification and Top-Brand PV Since 2015** - Over a decade of consecutive Top-Brand PV certifications (EuPD Research) alongside TÜV certification confirm consistent manufacturing quality. Heckert Solar has been in operation since 1992 and carries more than 30 years of industry history, reducing counterparty risk for long-term investors. - **Black Frame Included as Standard at No Premium** - The Black Frame variant is the baseline configuration of this series, whereas many European competitors charge a 5–10% premium over the silver-frame version for the same aesthetic upgrade. This eliminates the trade-off between visual appeal and budget in prosumer installations. ## Cons - **PERC Technology, Not N-Type TOPCon** - Comparable peer Luxor Solar offers N-type TOPCon in the same power class (up to 410 Wp) with an efficiency of 21.33% vs. a maximum of 20.8% for this series. P-type PERC cells lose 1–3% of output due to LID in the initial hours of operation and degrade at approximately 0.6–0.8%/year vs. ~0.4–0.5%/year for TOPCon, resulting in roughly a 2 percentage point difference in power retention after 25 years (PERC: ~88% vs. TOPCon: ~90%). - **No Bloomberg NEF Tier-1 Status** - Heckert Solar does not appear on the Bloomberg NEF Tier-1 list, which may present a barrier when seeking project finance for commercial installations above 50 kWp, where financial institutions routinely require modules from certified Tier-1 suppliers. ## About this series The NEMO 4.2 80 M Black Frame series redefines performance standards through an innovative design based on 80 monocrystalline cells. A key differentiator is **production fully localized in Germany**, which ensures rigorous quality control and a significantly lower carbon footprint compared to components imported from distant markets. These panels utilize advanced **11-busbar Half-Cut cell technology**, which effectively reduces energy losses and improves module efficiency even in partial shading conditions. The elegant black frame ensures the system looks aesthetic on any type of roofing, solving the dilemma of choosing between functionality and modern design. The construction is characterized by **above-average resistance to mechanical loads**, which is essential in the Polish climate exposed to sudden weather phenomena or heavy snow. The modules are dedicated primarily to residential prosumers and companies focusing on **maximum lifespan and investment security**. They are distinguished from the competition by a unique format that allows for optimal use of difficult roof surfaces while maintaining the highest electrical parameters. This is a sound choice for investors who value European engineering and long-term energy stability. ## Notable figures - At 20.8% efficiency, this panel is on par with typical \*\*PERC 400-450W\*\* modules - 209.4 W/m² power density - 3.2 W/m² more than \*\*PERC 400-450W\*\* median (206.2 W/m²), more power per roof area - Temperature coefficient of -0.34%/°C matches the \*\*PERC 400-450W\*\* median - At 21.0 kg, weight matches the \*\*PERC 400-450W\*\* median - In the top 75% for efficiency among all PERC panels ## Questions ### What warranty does the Heckert Solar NEMO® 4.2 80 M Black Frame series come with? Heckert Solar provides a 15-year product warranty and a 25-year linear power warranty on NEMO® 4.2 80 M Black Frame modules, guaranteeing at least 80% of rated output after 25 years. Both warranties are backed directly by a German manufacturer, ensuring straightforward claim enforcement without involving intermediaries. ### What does the 11-busbar half-cut PERC cell technology in the NEMO® 4.2 80 M actually mean for performance? Half-cut technology laser-splits PERC cells in half, reducing electrical resistance and heat losses. Eleven busbars further distribute current across each cell surface. The practical result is a module efficiency of approximately 20.5%, improved tolerance to partial shading, and slower degradation over the module's service life — meaning more energy generated per square meter of roof area every year. ### Are the NEMO® 4.2 80 M Black Frame panels a good fit for a pitched roof with partial shading from a chimney or dormer? Yes. The 80-cell half-cut layout with 11 busbars ensures that shading on one section of the module causes minimal losses across the remaining cells. The black frame integrates cleanly with dark roofing materials. The series is specifically engineered for residential prosumer installations on typical pitched roofs, including those with irregular surface geometry. ### What is the maximum power output of the Heckert Solar NEMO® 4.2 80 M Black Frame, and what does positive power tolerance mean? The NEMO® 4.2 80 M Black Frame series spans 395 to 405 Wp, with peak power in the series reaching approximately 408 Wp. Positive power tolerance (0/+5 Wp) means no panel leaves the factory below its rated output — every unit delivers at or above the labeled wattage. This matters when calculating actual system yield and return on investment. ### Why does German manufacturing of the NEMO® 4.2 80 M panels matter to an investor? NEMO® 4.2 80 M modules are produced exclusively at Heckert Solar's facilities in Chemnitz and Langenwetzendorf. German manufacturing means rigorous quality control at every production stage, a significantly lower carbon footprint compared to panels imported from Asia, and a shorter supply chain. The product also meets EU environmental standards and may qualify for support programs that favor European-made components. ### Is the NEMO® 4.2 80 M Black Frame series suitable for businesses and larger commercial installations? Yes, the series is designed for both residential prosumers and businesses seeking long-term energy stability. The low operating current below 9 A enables shorter string configurations, adding flexibility to system design and simplifying inverter selection. The combination of a 15-year product warranty, a 25-year power warranty, and European manufacturing makes it a strong option for investors who require predictable return on investment. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/DB-NeMo-42-80-M_Black_Frame_395-405-adac228bc342.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-4-280-m-black-frame-405wp Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.