--- 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" updated: 2026-09-11 --- # Heckert Solar NeMo® 4.2 80 M 405 Strong in heat, no clear weak spot 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Heckert Solar - **Model:** NeMo® 4.2 80 M 405 - **Series:** NeMo® 4.2 80 M - **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 - **The Only Fully Germany-Manufactured Module** - Heckert Solar is the sole PV module manufacturer producing exclusively in Germany, with facilities in Chemnitz and Langenwetzendorf. For investors sensitive to supply chain risk and build quality, this represents a tangible competitive advantage over the majority of peer comparables manufactured in Asia. - **microCell™ TLS Technology** - Thermal laser separation (microCell™ TLS) preserves cell mechanical integrity during the cutting process, limiting the initiation of microcracks — the primary driver of premature degradation in half-cut cell technology. This translates to lower long-term power loss risk compared to mechanically cut cells. - **Comprehensive IEC Certification Suite** - The series holds TÜV Rheinland certifications per IEC 61215, IEC 61730, IEC 61701 (salt mist), and IEC 62716 (ammonia). Salt mist and ammonia certification is not standard among comparable manufacturers and broadens the permissible installation environments to coastal and agricultural sites. - **20.1–20.8% Efficiency for PERC Technology** - The module efficiency range of 20.1–20.8% places the series at the upper boundary of what premium PERC modules achieve in the ~400 Wp format. Peer comparable VDS-S144/FNH reaches a maximum of 20.4%, while the Sunket SKT410 achieves 21% but already employs a different cell technology. - **Querstring G12 Layout — Design Flexibility** - The 80 half-cell G12 Querstring configuration provides greater flexibility in string length selection and module placement on the roof, offering a practical advantage for installations with irregular roof geometries. ## Cons - **PERC Instead of N-type TOPCon** - Peer comparable Luxor Solar Eco Line offers N-type TOPCon technology with 21.33% efficiency at the same power class (up to 430 Wp). TOPCon features a lower temperature coefficient (typically -0.30%/°C vs. -0.35%/°C for PERC) and reduced LID/LeTID degradation, translating to a meaningfully higher annual energy yield over a 25-year horizon. - **No Bifacial Variant Available** - The series is monofacial (is\_bifacial = false). Peer comparable Luxor Solar in the same power segment offers a glass-glass bifacial version, which in ground-mount or light-membrane rooftop installations typically delivers 5–15% additional generation from the rear side of the module. - **15-Year Product Warranty** - The product warranty stands at 15 years, while select premium manufacturers in the TOPCon segment — including Luxor Solar — now offer a 25-year product warranty. For investors evaluating the total cost of ownership (LCOE) of a PV system, this difference may be a material consideration. ## About this series The Heckert Solar NeMo® 4.2 80 M series is designed to maximize energy yield from a limited roof area - without compromising on durability and aesthetics. The use of **monocrystalline PERC cells in an 80-cell array** helps minimize losses in partially shaded conditions and improves operational stability in real-world scenarios. A key feature is the **G12 configuration with Querstring**, which simplifies installation design by allowing for flexibility in string length and module placement. The series utilizes **microCell TLS (laser thermal separation) technology**, which supports the long-term reliability of the cells and reduces the risk of microcracks. An additional advantage is the **two-component bonding technology**, which prevents moisture ingress and increases resistance to aging. NeMo® 4.2 80 M is a good choice for homes, businesses, and projects where high-quality workmanship, a consistent appearance (including black variants), and predictable performance over many years are important. ## Notable figures - At 20.8% efficiency, this panel is on par with typical \*\*PERC 400-450W\*\* modules - Power density of 209.4 W/m² packs 3.2 W/m² more into the same footprint vs \*\*PERC 400-450W\*\* median (206.2 W/m²) - At -0.34%/°C, hot weather performance is typical for \*\*PERC 400-450W\*\* panels - At 21.0 kg, weight matches the \*\*PERC 400-450W\*\* median - #10457 for efficiency, #8778 for temperature performance out of 14005 panels ## Questions ### What warranty does the Heckert Solar NeMo® 4.2 80 M series come with? Heckert Solar provides a 15-year product warranty (materials and workmanship) and a 25-year linear power output warranty for the NeMo® 4.2 80 M series. Manufacturing takes place exclusively in Germany — at facilities in Chemnitz and Langenwetzendorf — which ensures consistent module quality and credible long-term warranty backing throughout the declared service life. ### What is the maximum power output of a Heckert Solar NeMo® 4.2 80 M panel? The NeMo® 4.2 80 M series reaches a peak power of up to approximately 408 Wp (STC). Modules within this line are available from 390 Wp to over 405 Wp, with a module efficiency of around 20.3%. The high per-module wattage maximizes energy yield from limited roof space, making it a strong choice for small or irregularly shaped roof sections. ### Is the NeMo® 4.2 80 M suitable for installation on a pitched residential roof? Yes. The module measures 1736 × 1122 mm and weighs approximately 21 kg, well within standard residential rooftop installation parameters. The rated snow load tolerance of 5,400 Pa and wind load tolerance of 2,400 Pa ensure reliable performance in demanding Central European climates. The 80 half-cut cell layout simplifies sizing the array to the available roof surface while limiting shading losses. ### What is microCell TLS technology in the NeMo® 4.2 80 M panels and why does it matter? TLS (Thermal Laser Separation) is a PERC cell-cutting method that minimizes mechanical stress at the half-cell edges. This significantly reduces the risk of microcracks — the primary driver of long-term power degradation — compared to conventional mechanical scribing. In practice it results in more stable module output and more predictable energy yield throughout the full operational lifetime of the PV system. ### What is the G12 Querstring design in the Heckert Solar NeMo® 4.2 80 M and what does it offer installers? G12 Querstring refers to a module format based on 210 mm G12 wafers arranged horizontally across the panel width. This layout provides greater flexibility when configuring string lengths during system design — installers can position modules more freely without requiring additional power optimizers for standard roof geometries. It is especially useful in installations with irregular or segmented roof sections. ### Is the Heckert Solar NeMo® 4.2 80 M available in a black variant, and do the specs differ? Yes, the NeMo® 4.2 80 M series is produced in a Black edition featuring a black frame and black backsheet, giving the installation a uniform, visually clean appearance. The black variant is particularly popular for new residential builds and commercial properties where roof aesthetics matter. Electrical specifications — power output, efficiency, operating temperature range — and all warranty terms remain identical to the standard version. ## 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 | | --- | --- | --- | | [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 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.