--- title: "Heckert Solar NeMo 3.0 120M 375 375W Solar Panel - Specs & Review | ComparePV" description: "Heckert Solar NeMo 3.0 120M 375 375W solar panel. Specs: 19.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/heckert-solar-nemo-3-0-120m-375" updated: 2026-09-11 --- # Heckert Solar NeMo 3.0 120M 375 Middle of its segment, needs the roof space 5,812 panels in the 275-475 W band, all technologies ## Identity - **Manufacturer:** Heckert Solar - **Model:** NeMo 3.0 120M 375 - **Series:** NeMo 3.0 120M - **Rated power:** 375 W - **Cell technology:** Monocrystalline ## How it compares Compared against 275-475 W band, all technologies (5812 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 375 W | 425 W | Weak - bottom 17% | | | Module efficiency | 19.80% | 21.11% | Weak - bottom 19% | 12,416 | | Power density | 197.6 | 211.3 | Weak - bottom 19% | 12,437 | | Temperature coefficient | -0.343 | -0.310 | Typical | 10,348 | | Weight (kg) | 20.5 kg | 22.0 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 20% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 19.80% | 21.11% | Weak - bottom 19% | 12,416 | | Power density | 197.6 | 211.3 | Weak - bottom 19% | 12,437 | | Temperature coefficient | -0.343 | -0.310 | Typical | 10,348 | | Weight per kWp | 54.7 | 53.5 | Typical | 9,054 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 20% | 9,798 | ### Watch out for - **197.6 watts per square metre** - Bottom 19% of the 275-475 W band, against a median of 211.3. - **19.80% module efficiency** - Bottom 19% of the 275-475 W band, against a median of 21.11%. - **25 year performance warranty** - Bottom 20% of the 275-475 W band, against a median of 30 yrs. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Roofs where every square metre has to count, tight roof space and owners who want a long output guarantee. ## 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 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 - **German manufacturing, full quality control** - Modules are produced at Heckert Solar's Langenwetzendorf (Thuringia) and Chemnitz plants without relying on imported cells from Asia. Heckert Solar is one of the last manufacturers maintaining continuous module production in Germany, resulting in predictable quality and a shorter supply chain. - **Half-cut technology with 120 PERC cells** - Splitting cells into halves (half-cut) reduces resistive losses and improves partial-shading performance compared to conventional 60-cell modules, which is significant on roofs with irregular sun exposure. - **9 busbars increase reliability** - Using 9 busbars instead of the standard 5 improves current collection from each cell and reduces the risk of microcracks affecting power output, supporting long-term performance stability. - **Local warranty service in the EU** - 15-year product warranty and 25-year power warranty are backed by a Germany-based manufacturer, offering a simpler claims process for investors than dealing with suppliers outside the EU. ## Cons - **Production discontinued in 2022** - The NeMo 3.0 120M series was phased out (released 2019, discontinued 2022), meaning limited market availability and potential difficulty sourcing matching modules for future system expansion. - **Efficiency below peer competitors** - Efficiency of 19.8-20.2% trails comparable modules: Solarwatt Panel vision GM 3.0 pure (20.7%), Suntech Ultra S mini (21.1%), and JA Solar JAM60D20 (20.6%) at the same 385 Wp maximum power, meaning a larger roof area is needed for equivalent output. ## About this series The NeMo 3.0 120M series from Heckert Solar is a German answer to investors' growing expectations for durability and performance in photovoltaic installations. The modules are manufactured at the factory in Langenwetzendorf, Thuringia, which means full control over the production process and none of the compromises typical of Asian assembly lines relying on imported components. At the heart of the series is **half-cut cell technology**, thanks to which 120 monocrystalline PERC cells generate less power loss than classic 60-cell designs, and the panel performs better under **partial shading** conditions. The use of **9 busbars** improves current collection and the stability of internal connections, translating into higher reliability over the long operating life. This solution is aimed at investors - both residential and commercial - for whom **German manufacturing quality** and predictable, locally handled warranty service matter, without the need to deal with distant suppliers. The NeMo 3.0 120M series performs particularly well on roofs with irregular sun exposure, where shading resistance genuinely impacts annual energy yield, while also offering a solid alternative to Asian-made modules at a comparable price point. ## Notable figures - Efficiency of 19.8% is 2.0pp below the \*\*database\*\* median (21.8%) - 197.6 W/m² power density is 20.5 W/m² below \*\*database\*\* median (218.1 W/m²) - requires larger installation area - At -0.34%/°C, loses 0.04pp more power per degree than \*\*database\*\* median (-0.30%/°C) - At 20.5 kg, this panel is 6.0 kg lighter than \*\*database\*\* median (26.5 kg) - easier handling during installation - Ranked #12416 out of 14005 panels for efficiency in the database ## Questions ### How does the half-cut cell technology in the NeMo 3.0 120M differ from classic 60-cell panels? In NeMo 3.0 120M panels, each standard monocrystalline PERC cell is cut in half, resulting in 120 smaller half-cells instead of 60 full cells. This lowers the current flowing through each individual cell, reducing resistive losses and improving module efficiency. The panel also handles partial shading better, since shading one row of half-cells has less impact on overall module output than in classic constructions. ### What warranty comes with Heckert Solar NeMo 3.0 120M panels? The manufacturer provides a 15-year product warranty covering material and workmanship defects, plus a 25-year linear power output warranty. Warranty service is handled locally in Europe, without needing to contact distant Asian suppliers, which for many investors means a faster and simpler claims process. ### Is the NeMo 3.0 120M series still available for purchase? The NeMo 3.0 120M series has been discontinued from Heckert Solar's current production lineup and replaced by newer models. Panels may still be available from distributors as final stock, but once these quantities are sold out, new units will no longer be purchasable. The manufacturer's warranty remains valid regardless of the production end. ### What is the maximum power output and efficiency of the NeMo 3.0 120M panel? The panel reaches a maximum power of 385 Wp with an efficiency of about 20.3 percent, a very strong result for monocrystalline PERC modules. Higher efficiency means less roof area is needed to reach a given system capacity compared to older, less efficient modules. ### Will the NeMo 3.0 120M work well on a roof that is partially shaded by a chimney or trees? Yes, this is one of the series' main use cases. The use of 120 half-cut cells and 9 busbars means partial shading of individual cells causes a smaller drop in overall panel output than in classic 60-cell constructions. In practice, this results in higher annual energy yield on roofs with irregular sun exposure, such as those with chimneys, dormers, or shading from nearby buildings. ### Can Heckert Solar NeMo 3.0 120M panels withstand heavy snow and wind loads? Yes, the module has a confirmed snow load tolerance of up to 5400 Pa and a wind load tolerance of up to 2400 Pa, meeting requirements for most Polish climate zones, including mountain and foothill areas with heavy winter snowfall. The sturdy frame construction combined with German production quality control results in high mechanical durability of the installation. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/DB-NeMo-30-120-M-375-385-Wp-bfc8b2c27c51.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-3-0-120m-375 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.