--- title: "Heckert Solar NeMo 3.0 120 M 375 375W Solar Panel - Specs & Review | ComparePV" description: "Heckert Solar NeMo 3.0 120 M 375 375W solar panel. Specs: 19.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/heckert-solar-nemo-3-0-120-m-375-1" updated: 2026-09-11 --- # Heckert Solar NeMo 3.0 120 M 375 Strong in heat, no clear weak spot 579 panels in the segment PERC 350-400 W ## Identity - **Manufacturer:** Heckert Solar - **Model:** NeMo 3.0 120 M 375 - **Series:** NeMo 3.0 120 M - **Rated power:** 375 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 350-400 W (579 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 375 W | 380 W | Typical | | | Module efficiency | 19.80% | 19.90% | Typical | 12,416 | | Power density | 197.6 | 199.0 | Typical | 12,437 | | Temperature coefficient | -0.343 | -0.350 | Strong - top 25% | 10,348 | | Weight (kg) | 20.5 kg | 21.4 kg | Typical | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 19.80% | 19.90% | Typical | 12,416 | | Power density | 197.6 | 199.0 | Typical | 12,437 | | Temperature coefficient | -0.343 | -0.350 | Strong - top 25% | 10,348 | | Weight per kWp | 54.7 | 55.8 | Typical | 9,054 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Strengths - **-0.343 %/°C temperature coefficient** - Top 25% of the PERC 350-400 W segment, against a median of -0.350. - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 375 W - **Efficiency:** 19.80 % - **Voltage at Pmax (Vmp):** 35.60 V - **Current at Pmax (Imp):** 10.58 A - **Open-circuit voltage (Voc):** 41.24 V - **Short-circuit current (Isc):** 11.11 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 - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 120 ### Physical - **Length:** 1790 mm - **Width:** 1060 mm - **Thickness:** 35 mm - **Weight:** 20.5 kg - **Area:** 1.90 m2 - **Power density:** 197.6 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:** 285 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12416 of 14005 | | Power density | 12437 of 14005 | | Temperature coefficient | 10348 of 14005 | | Weight | 9054 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Made in Germany Using 100% Renewable Energy** - The manufacturing facility in Langenwetzendorf, Thuringia, operates exclusively on renewable energy, including power generated by on-site rooftop PV installations. In 2023, Fraunhofer ISE confirmed that Heckert modules achieve a carbon footprint below 18 g CO₂/kWh — a significant advantage over Asian-manufactured modules produced using carbon-intensive grid mixes. - **Mechanical Load Rating: 5,400 Pa (Snow) / 2,400 Pa (Wind)** - The snow load rating of 5,400 Pa exceeds the standard IEC threshold of 2,400 Pa by more than twofold, directly addressing the climatic demands of Poland's snow load zones II–III. The wind load rating of 2,400 Pa meets Eurocode requirements for open-rack installations. - **Half-Cut PERC with 9 Busbars — Reduced Shading Losses** - Splitting 120 M6 cells into two independent electrical sub-strings reduces partial-shading losses by approximately 50% compared to full-cell modules. The 9-busbar layout shortens current path length and lowers series resistance, improving energy yield under diffuse irradiance — a condition typical for Poland's approximately 1,600 sunshine hours per year. - **Full TÜV Certification + PID, NH₃, and Salt Mist Resistance** - The modules carry IEC 61215 and IEC 61730 certifications (TÜV Rheinland) and have passed ammonia resistance and salt mist tests, qualifying them for installation in aggressive environments such as agricultural sites and coastal zones. PID protection guards cells against degradation at system voltages up to 1,000 V. - **European Supply Chain and Long-Term Service Continuity** - In continuous operation since 1992, Heckert manufactures at its own German facility — not a third-party assembly plant. The NeMo 3.0 series has been in production since 2020 and has not been discontinued (discontinued = false), minimizing supply risk for system expansions and warranty service. ## Cons - **Efficiency Up to 20.2% vs. 20.7% (Solarwatt) and 20.6% (JA Solar)** - The highest-performing variant in the series (385 Wp, 20.29%) sits 0.4–0.5 percentage points below direct competitors — the Solarwatt Panel vision GM 3.0 pure (20.7%) and JA Solar JAM60D20 (20.6%). On a standard 30 m² roof, this translates to approximately 80–100 Wp less peak installed capacity compared to a Solarwatt system. - **P-Type PERC Technology Rather Than Newer N-Type TOPCon** - The series was designed in 2020 around P-type PERC technology. Since 2022–2023, the European market has been migrating toward N-type TOPCon and HJT, which offer a lower temperature coefficient (~−0.30%/°C vs. −0.36%/°C for PERC) and reduced LID. On hot summer days, this difference can translate to a 3–5% lower hourly energy yield relative to TOPCon modules. - **15-Year Product Warranty vs. 30 Years for Solarwatt GM 3.0 pure** - At an equivalent power class (up to 385 Wp), Solarwatt provides a 30-year product warranty (glass-glass construction) compared to 15 years for the NeMo 3.0. For systems designed for a 25–30 year operational life, the difference in manufacturer warranty coverage is substantial — particularly with respect to latent defects that may surface after a decade of operation. ## About this series Heckert Solar NeMo 3.0 120 M panels are an advanced solution based on half-cell technology that maximizes the performance of the photovoltaic system even in difficult lighting conditions. Manufactured in Germany, these modules focus on uncompromising quality and local supply chains, which guarantees the highest repeatability of technical parameters. Thanks to the use of **Half-Cut** technology and an innovative cell connection system, this series effectively minimizes energy losses resulting from partial shading of individual sections. For investors seeking long-term durability, a key advantage is **above-average resistance to mechanical loads**, making these modules an ideal choice for the Polish climate characterized by heavy snowfall and strong winds. What sets NeMo 3.0 apart from Asian competitors is an exceptionally **sustainable production process** utilizing entirely green energy, which drastically reduces the product's carbon footprint. These panels are perfect for single-family home roofs and modern business installations, offering users **high efficiency in low light** and full protection against PID-type degradation. By choosing this series, you are investing in proven European engineering focused on maximum longevity and the stability of energy yields for decades. ## Notable figures - Efficiency of 19.8% matches the \*\*PERC 0-400W\*\* median - 197.6 W/m² power density - 3.2 W/m² more than \*\*PERC 0-400W\*\* median (194.4 W/m²), more power per roof area - At -0.34%/°C, hot weather performance is typical for \*\*PERC 0-400W\*\* panels - In the top 89% for efficiency among all PERC panels ## Questions ### What warranty does the Heckert Solar NeMo 3.0 120 M come with? The NeMo 3.0 120 M series carries a 15-year product warranty covering material and workmanship defects, plus a 25-year linear power output warranty. Heckert Solar guarantees at least 90% of rated power for the first 10 years and no less than 80% for the following 15 years. These terms exceed the market average and are backed by the financial stability of a German manufacturer with domestic supply chains. ### Can the NeMo 3.0 120 M panels handle heavy snow loads and strong winds common in Central European climates? Yes. The NeMo 3.0 120 M modules are certified for snow loads up to 5400 Pa and wind pressure up to 2400 Pa, far exceeding the 2400–3600 Pa typical of many Asian-manufactured panels. The reinforced aluminum frame and tempered glass make this series particularly well-suited for regions with harsh winters, including heavy snowfall areas, without any risk of frame deformation or cell cracking. ### What is half-cut PERC technology in the NeMo 3.0 120 M and how does it benefit my system? The panel uses 120 monocrystalline PERC cells sliced in half using a laser-cutting process (microCELL TLS). Each half-cell carries half the current, which significantly reduces resistive and thermal losses. The practical result is higher output under partial shading conditions — from a chimney or antenna — since one shaded section does not shut down the entire string. Module efficiency reaches approximately 20.3%, which is a strong result for PERC technology. ### Are Heckert Solar NeMo 3.0 120 M panels suitable for a pitched residential roof? Yes, pitched residential roofs are the primary application for this series. The 385 Wp module measures 1790×1060 mm and weighs approximately 19–20 kg, fitting within standard roof structural load limits. MC4 connectors are compatible with all major racking systems (Schletter, K2, Esdec). The module's high mechanical load tolerance and PID protection make it a reliable choice for both simple gable roofs and complex multi-pitch configurations. ### How do the NeMo 3.0 120 M panels differ from the previous NeMo 2.0 60 M series? The 3.0 generation replaced the NeMo 2.0 60 M by doubling the cell count from 60 to 120 full cells through half-cut technology. Peak power increased from the 300–325 Wp range to 375–385 Wp, and module efficiency improved from roughly 17–18% to over 20%. The new series also offers better partial shading tolerance, lower operating cell temperature, and is manufactured entirely using renewable energy, substantially reducing the product's carbon footprint. ### How does the Heckert Solar NeMo 3.0 120 M 385W perform in overcast conditions and low irradiance? Monocrystalline PERC technology combined with half-cut cell architecture delivers better low-light performance compared to standard polycrystalline modules. Heckert Solar highlights strong output under diffuse irradiance conditions, which is especially relevant in Central Europe where a considerable share of annual energy yield comes from overcast days. Although the module is not bifacial and does not harvest albedo light, its module efficiency above 20% compensates for that in typical rooftop installations. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/DB-NeMo-30-120-M-375-385-Wp-68f232fe31cc.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Cooler, lighter, +3.3 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, lighter, +3.3 pp | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | Lighter, +3.2 pp, +5 yr warranty | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | Lighter, +3.2 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, +3.2 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 | +25 W, +3.2 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 | +25 W, +3.2 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, +3.2 pp, +5 yr warranty | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | Cooler, +2.8 pp, +15 yr warranty | | [Maxeon SPR-MAX3-425-R](https://comparepv.com/panel/maxeon-spr-max3-425-r) | 425 W | Cooler, +2.6 pp, +15 yr warranty | | [Heckert Solar NeMo® 3.0 120 M 380](https://comparepv.com/panel/heckert-solar-nemo-3-0-120-m-380) | 380 W | Very close match | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +135 W, cooler, +5.2 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +120 W, cooler, +5.0 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +130 W, cooler, +4.9 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +115 W, cooler, +4.7 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +125 W, cooler, +4.7 pp | --- Source: https://comparepv.com/panel/heckert-solar-nemo-3-0-120-m-375-1 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.