--- title: "Heckert Solar NeMo 4.2 80 M 390 392W Solar Panel - Specs & Review | ComparePV" description: "Heckert Solar NeMo 4.2 80 M 390 392W solar panel. Specs: 20.10% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/heckert-solar-nemo-4-2-80-m-390-1" updated: 2026-09-11 --- # Heckert Solar NeMo 4.2 80 M 390 Middle of its segment, short guarantee 6,361 panels in the 292-492 W band, all technologies ## Identity - **Manufacturer:** Heckert Solar - **Model:** NeMo 4.2 80 M 390 - **Series:** NeMo 4.2 80 M - **Rated power:** 392 W - **Cell technology:** Monocrystalline ## How it compares Compared against 292-492 W band, all technologies (6361 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 392 W | 430 W | Weak - bottom 20% | | | Module efficiency | 20.10% | 21.28% | Weak - bottom 21% | 12,102 | | Power density | 201.3 | 212.5 | Weak - bottom 21% | 12,094 | | 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 | 20.10% | 21.28% | Weak - bottom 21% | 12,102 | | Power density | 201.3 | 212.5 | Weak - bottom 21% | 12,094 | | Temperature coefficient | -0.340 | -0.300 | Typical | 8,778 | | Weight per kWp | 53.6 | 53.2 | Typical | 7,583 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 19% | 9,798 | ### Watch out for - **25 year performance warranty** - Bottom 19% of the 292-492 W band, against a median of 30 yrs. - **20.10% module efficiency** - Bottom 21% of the 292-492 W band, against a median of 21.28%. - **201.3 watts per square metre** - Bottom 21% of the 292-492 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):** 392 W - **Efficiency:** 20.10 % - **Voltage at Pmax (Vmp):** 46.25 V - **Current at Pmax (Imp):** 8.48 A - **Open-circuit voltage (Voc):** 54.33 V - **Short-circuit current (Isc):** 8.96 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:** 201.3 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:** 298 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12102 of 14005 | | Power density | 12094 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 7583 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **12 busbars per cell vs. the industry-standard 10** - Heckert Solar uses 12 busbars per cell — compared to the market-standard 10 — reducing resistive losses during current conduction and delivering a measurable gain in module output. Combined with the G12 half-cut cell layout, the two effects are additive. - **Low temperature coefficient: -0.34%/°C** - For Mono PERC technology, a coefficient of -0.34%/°C places this series at the top of its class — typical Mono PERC modules fall between -0.35% and -0.40%/°C. Under central European summer conditions (cell temperatures reaching 65°C), the 0.06 percentage-point advantage over the segment median translates to several tens of kWh per year on a 10 kWp system. - **Environmental certifications exceeding baseline requirements** - The module holds TÜV Rheinland certifications to IEC 61215, IEC 61730, and IEC 61701 (salt mist corrosion resistance), along with a DLG certificate (ammonia exposure test) and IP68 ingress protection. This qualifies installations near coastlines, livestock farms, and industrial facilities without additional caveats. - **Made in Germany — manufacturer active since 1992** - Heckert Solar has manufactured in Germany for over 30 years, with a fully traceable supply chain and production powered 100% by renewable electricity from its own PV installation. This eliminates compliance risks — including forced-labor audits and UFLPA exposure — associated with Asian suppliers. - **15-year product warranty + 25-year power output warranty** - The 15-year product warranty sits at the upper end of the market standard for European manufacturers. The linear 25-year power output warranty provides predictable energy yield, supporting prosumer financing models and commercial project underwriting. ## Cons - **Module efficiency of 20.1% — lowest among all peers** - Within the provided comparison set, the NeMo 4.2 80 M (20.1%) records the lowest efficiency: Meyer Burger Glass reaches 21.2%, Phono Solar Twinplus 21.3%, and JA Solar JAM60S21 21.0%. The ~1.1 percentage-point gap versus Meyer Burger translates to approximately 5.2% less energy from the same roof area — a tangible constraint on space-limited installations. - **No bifacial technology** - The series is monofacial (is\_bifacial: false). In the 390+ Wp premium segment, an increasing number of Tier-1 modules offer bifacial construction — delivering an additional 5–15% yield gain from albedo reflection — which provides a measurable energy advantage in installations over light-colored gravel ballast or snow that the NeMo 4.2 80 M cannot match. ## About this series The Heckert Solar NeMo 4.2 80 M series features advanced photovoltaic modules that redefine quality standards thanks to the **Made in Germany** label. The use of modern G12 format cells and **half-cut technology** allows for high power density while maintaining optimal dimensions. This is an ideal solution for investors with limited installation space, where the priority is to maximize yields from every square meter of the roof. These panels stand out from the competition due to their **above-average mechanical stability**, which guarantees resistance to extreme snow loads and gusty winds, typical for the regional climate. Significantly, this series is manufactured through a **sustainable production process** powered by green energy, making it an environmentally responsible choice. Unlike many mass-market products, the NeMo 4.2 80 M offers uncompromising manufacturing precision and component longevity. The design, optimized to reduce losses caused by shading, ensures these panels perform perfectly in demanding residential and commercial installations. By choosing this solution, the user gains **maximum energy security** and the certainty that the system will maintain high efficiency throughout decades of operation. ## Notable figures - Efficiency of 20.1% is 1.7pp below the \*\*database\*\* median (21.8%) - Power density of 201.4 W/m² is 16.7 W/m² below \*\*database\*\* median (218.1 W/m²) - needs more roof space - 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 - Ranked #12102 out of 14005 panels for efficiency in the database ## Questions ### What warranties come with the Heckert Solar NeMo 4.2 80 M panels? The NeMo 4.2 80 M series includes a 15-year product warranty covering material and workmanship defects, plus a 25-year linear power output warranty. The power warranty guarantees the module retains a specified percentage of its rated output over 25 years of operation. Both warranties are honored directly by Heckert Solar from their German manufacturing sites, minimizing the risk of warranty non-fulfillment. ### How do NeMo 4.2 80 M panels perform in a Central European climate — snow, frost, and strong winds? The NeMo 4.2 80 M is rated for snow loads up to 5,400 Pa and wind loads up to 2,400 Pa, comfortably exceeding the requirements of typical Polish residential roof installations. The operating temperature range spans -40°C to +85°C, and the power temperature coefficient of -0.34%/°C limits output loss even during hot summers. The above-average mechanical frame rigidity ensures long-term structural durability. ### What does it mean that the NeMo 4.2 80 M uses G12 half-cut cells, and why does it matter for my system? The NeMo 4.2 80 M is built with 80 monocrystalline G12-format half-cut cells. Splitting each cell into two sections lowers internal resistance and reduces resistive heating losses. In practice, this means the panel maintains significantly higher energy output when partial shading falls across its surface — from a chimney, dormer window, or an adjacent module. ### What are the dimensions and weight of the Heckert Solar NeMo 4.2 80 M — will it fit on a standard pitched roof? The module measures 1,736 mm × 1,122 mm × 35 mm and weighs 21 kg. These are standard prosumer panel dimensions, compatible with most aluminum rail mounting systems available on the market. On a typical roof pitched at 30–45°, installation presents no logistical challenges; two installers can handle the module comfortably without specialized lifting equipment. ### What is the real-world efficiency of the Heckert Solar NeMo 4.2 80 M and how does it compare to competing panels? Module efficiency is approximately 20.3% under STC conditions, delivering peak output of up to 405 Wp from just 1.95 m² of surface area. This is above the market average for monocrystalline prosumer panels, achieved through G12 half-cut cells with 12 busbars. For installations with limited roof space, it translates to more annual kWh yield compared to older, less efficient models. ### Is the production of NeMo 4.2 80 M panels genuinely eco-friendly, or is it just a marketing claim? Heckert Solar manufactures the NeMo 4.2 80 M series at facilities in Chemnitz and Langenwetzendorf, Germany, powered entirely by renewable energy sources. This results in a verifiably lower production carbon footprint compared to panels manufactured using coal-based electricity grids. The Made in Germany label here is backed by an auditable sustainable manufacturing policy, not merely an advertising slogan. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/db-nemo-4-2-80-m-390-405-web-834d31240b90.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, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | Lighter, +2.9 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, +2.9 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, +2.9 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, +2.9 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, +2.9 pp, +5 yr warranty | | [Jetion JT440SYK(B)](https://comparepv.com/panel/jetion-jt440syk-b) | 440 W | Cooler, +2.8 pp, +5 yr warranty | | [Luxor Solar LX-440M/182-108+](https://comparepv.com/panel/luxor-solar-lx-440m-182-108) | 440 W | +48 W, cooler, +2.8 pp | | [Heckert Solar NEMO® 4.1 80 M 385](https://comparepv.com/panel/heckert-solar-nemo-4-1-80-m-385) | 385 W | -0.3 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 | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +118 W, cooler, +4.9 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +103 W, cooler, +4.7 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +113 W, cooler, +4.6 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +98 W, cooler, +4.4 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +108 W, cooler, +4.4 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +108 W, cooler, +4.4 pp | --- Source: https://comparepv.com/panel/heckert-solar-nemo-4-2-80-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.