--- title: "Heckert Solar NEMO 4.1 80 M 390 390W Solar Panel - Specs & Review | ComparePV" description: "Heckert Solar NEMO 4.1 80 M 390 390W solar panel. Specs: 20.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/heckert-solar-nemo-4-1-80-m-390-1" updated: 2026-09-11 --- # Heckert Solar NEMO 4.1 80 M 390 Middle of its segment, short guarantee 6,208 panels in the 290-490 W band, all technologies ## Identity - **Manufacturer:** Heckert Solar - **Model:** NEMO 4.1 80 M 390 - **Series:** NEMO 4.1 80 M - **Rated power:** 390 W - **Cell technology:** Monocrystalline ## How it compares Compared against 290-490 W band, all technologies (6208 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 390 W | 430 W | Weak - bottom 20% | | | Module efficiency | 20.00% | 21.26% | Weak - bottom 20% | 12,214 | | Power density | 200.2 | 212.5 | Weak - bottom 21% | 12,179 | | Temperature coefficient | -0.343 | -0.300 | Typical | 10,348 | | Weight (kg) | 21.0 kg | 22.3 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 | 20.00% | 21.26% | Weak - bottom 20% | 12,214 | | Power density | 200.2 | 212.5 | Weak - bottom 21% | 12,179 | | Temperature coefficient | -0.343 | -0.300 | Typical | 10,348 | | Weight per kWp | 53.8 | 53.3 | Typical | 7,897 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 19% | 9,798 | ### Watch out for - **25 year performance warranty** - Bottom 19% of the 290-490 W band, against a median of 30 yrs. - **20.00% module efficiency** - Bottom 20% of the 290-490 W band, against a median of 21.26%. - **200.2 watts per square metre** - Bottom 21% of the 290-490 W band, against a median of 212.5. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Owners who want a long output guarantee, tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 390 W - **Efficiency:** 20.00 % - **Voltage at Pmax (Vmp):** 23.41 V - **Current at Pmax (Imp):** 16.77 A - **Open-circuit voltage (Voc):** 27.64 V - **Short-circuit current (Isc):** 17.58 A - **Max system voltage:** 1000 V ### Temperature - **Temperature coefficient of Pmax:** -0.343 %/degC - **Temperature coefficient of Voc:** -0.263 %/degC - **Temperature coefficient of Isc:** 0.033 %/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:** 200.2 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:** 297 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12214 of 14005 | | Power density | 12179 of 14005 | | Temperature coefficient | 10348 of 14005 | | Weight | 7897 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **19.8–20.5% Efficiency Above Segment Median** - The NEMO 4.1 80 M module efficiency significantly exceeds that of peer-comparable DMEGC GH400M10T-B48HST (15.48%) and is on par with the Solaria PowerXT (20.2%). Within the standard monocrystalline half-cut module class, this positions the series in the top quartile of available products. - **80 Half-Cut Cells – Compact Form Factor** - The 80 half-cut cell configuration, versus the typical 108–120 cells, results in a smaller module footprint while maintaining 385–400 Wp output, facilitating installation on rooftops with irregular geometry. Half-cut cell technology reduces operating current by 50%, lowering resistive losses and improving partial shading tolerance. - **VDE, TÜV, and IEC 61215:2016 / IEC 61730:2016 Certifications** - Heckert Solar was among the first manufacturers to obtain TÜV certification under the updated IEC 61215:2016 and IEC 61730:2016 standards, which encompass approximately 60 quality and safety tests. Manufacturing is conducted exclusively in Germany (Chemnitz) under ISO 14001:2015 environmental management and EU labor standards. - **Established Manufacturer – Top Brand PV Since 2015** - Heckert Solar has continuously received the EuPD Research Top Brand PV award since 2015, including the 2023 certification. With operations dating back to 1992, this EU-based manufacturer offers more credible warranty enforcement compared to a number of Asian competitors. ## Cons - **Series Discontinued (2023)** - The NEMO 4.1 80 M series was discontinued in 2023. This results in limited and declining availability of new modules on the secondary market, making future capacity additions difficult and potentially extending lead times for warranty replacements compared to active series such as the NEMO 4.2 80 M. - **15-Year Product Warranty – Below Premium Market Standard** - The product warranty stands at 15 years, whereas the peer-comparable Meyer Burger White offers a 25-year product warranty with a degradation rate of only 0.25%/year and 92% power retention after 25 years. For installations with a 25+ year horizon, this difference is material when evaluating total cost of ownership. - **No Bifacial Technology** - The series is monofacial (is\_bifacial: false). At a comparable price and installation footprint, bifacial modules can achieve 5–15% higher annual energy yield under reflective ground conditions (white membrane, gravel, snow). This limits the series' attractiveness for ground-mount and flat-roof installations. ## About this series Heckert Solar NEMO 4.1 80 M photovoltaic panels redefine the concept of European quality thanks to a unique design based on **80 monocrystalline cells in half-cut technology**. This solution allows for high efficiency even on roofs with complex geometry, where every square centimeter matters. This series stands out from the competition primarily due to its **compact module format**, which enables more flexible installation design while maintaining excellent mechanical parameters. Engineers from Chemnitz focused on an innovative cell interconnection process, which effectively eliminates the problem of micro-cracks and significantly reduces internal resistance. For the investor, this means not only higher yields in low-light conditions, but above all **unrivaled durability confirmed by German certificates**. By choosing these modules, the user solves the problem of uncertainty regarding the system's longevity, gaining a product with a sustainable carbon footprint. It is an ideal proposition for demanding prosumers and companies that care about **maximum resistance to snow and wind loads** and financial stability resulting from predictable energy production for decades. Exceptional aesthetics and precise frame finishing make the NEMO 4.1 80 M a model of modern design in the service of ecology. ## Notable figures - Efficiency of 20.0% is 1.8pp below the \*\*database\*\* median (21.8%) - At 200.2 W/m², this panel generates 17.9 W/m² less per unit area than \*\*database\*\* median (218.1 W/m²) - At -0.34%/°C, loses 0.04pp more power per degree than \*\*database\*\* median (-0.30%/°C) - At 21.0 kg, this panel is 5.5 kg lighter than \*\*database\*\* median (26.5 kg) - easier handling during installation - #12214 for efficiency, #10348 for temperature performance out of 14005 panels ## Questions ### Are Heckert Solar NEMO 4.1 80 M panels still available for purchase? The NEMO 4.1 80 M series has been discontinued and is no longer actively manufactured by Heckert Solar. Limited quantities may still be available from distributors as remaining stock. Customers looking for a current equivalent should consider the NEMO 4.2 80 M series, the direct successor with comparable specs and an improved production process. ### What warranty does the Heckert Solar NEMO 4.1 80 M come with? The manufacturer provides a 15-year product warranty covering material and workmanship defects, plus a 25-year linear power output warranty. Since the modules are produced at the Chemnitz facility in Germany, warranty claims are handled directly by a European manufacturer, significantly reducing the fulfillment risk compared to overseas suppliers. ### What is the half-cut cell technology used in the NEMO 4.1 80 M and is it worth the premium? Half-cut technology splits each solar cell in two, yielding 80 smaller half-cells instead of the standard 40. This lowers internal resistance and thermal losses. The NEMO 4.1 80 M additionally uses 12 busbars, effectively eliminating micro-crack risk and delivering better output under partial shading conditions as well as an extended service life. ### Are the NEMO 4.1 80 M panels suitable for small or geometrically complex roofs? Yes, the compact module format (1,736×1,122 mm) and 21 kg weight make the NEMO 4.1 80 M a strong choice for roofs with dormers, chimneys, or irregular surfaces. The smaller dimensions allow flexible panel placement and simplify installation on narrow roof sections where larger-format modules would not fit in an optimal configuration, while still delivering up to 400 Wp per module. ### How do Heckert Solar NEMO 4.1 80 M panels perform in winter and low-light conditions? Thanks to the half-cut cell design and 80 monocrystalline cells, the NEMO 4.1 80 M maintains approximately 20% efficiency even at low solar angles and under the diffuse irradiance typical of Central European winters. The operating temperature range spans -40°C to +85°C, and cooler temperatures inherently improve output in monocrystalline modules compared to summer peak conditions. ### What mechanical loads can the Heckert Solar NEMO 4.1 80 M modules handle? The NEMO 4.1 80 M modules are tested to a surface load of approximately 5,400 Pa (5.4 kPa), equivalent to substantial snow accumulation or strong wind pressure. The 3.2 mm anti-reflective coated tempered glass and robust aluminum frame provide IEC-certified mechanical durability, making them well-suited for climates with heavy snowfall such as those found across Central Europe. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/db-nemo-4-1-80-m-385-400-963418127c3c.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 | +50 W, cooler, +3.1 pp | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | -50 W, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | Lighter, +3.0 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, +3.0 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, +3.0 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, +3.0 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, +3.0 pp, +5 yr warranty | | [Jetion JT440SYK(B)](https://comparepv.com/panel/jetion-jt440syk-b) | 440 W | +50 W, cooler, +2.9 pp | | [Heckert Solar NEMO® 4.1 80 M 385](https://comparepv.com/panel/heckert-solar-nemo-4-1-80-m-385) | 385 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 | +120 W, cooler, +5.0 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +105 W, cooler, +4.8 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +115 W, cooler, +4.7 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +100 W, cooler, +4.5 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +110 W, cooler, +4.5 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +110 W, cooler, +4.5 pp | --- Source: https://comparepv.com/panel/heckert-solar-nemo-4-1-80-m-390-1 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.