--- title: "Heckert Solar NeMo® 3.0 120 M 380 380W Solar Panel - Specs & Review | ComparePV" description: "Heckert Solar NeMo® 3.0 120 M 380 380W solar panel. Specs: 20.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/heckert-solar-nemo-3-0-120-m-380" updated: 2026-09-11 --- # Heckert Solar NeMo® 3.0 120 M 380 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 380 - **Series:** NeMo® 3.0 120 M - **Rated power:** 380 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) | 380 W | 380 W | Typical | | | Module efficiency | 20.00% | 19.90% | Typical | 12,214 | | Power density | 200.3 | 199.0 | Typical | 12,165 | | 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 | 20.00% | 19.90% | Typical | 12,214 | | Power density | 200.3 | 199.0 | Typical | 12,165 | | Temperature coefficient | -0.343 | -0.350 | Strong - top 25% | 10,348 | | Weight per kWp | 53.9 | 55.8 | Typical | 8,139 | | 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):** 380 W - **Efficiency:** 20.00 % - **Voltage at Pmax (Vmp):** 34.97 V - **Current at Pmax (Imp):** 10.90 A - **Open-circuit voltage (Voc):** 41.47 V - **Short-circuit current (Isc):** 11.38 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:** 200.3 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:** 289 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12214 of 14005 | | Power density | 12165 of 14005 | | Temperature coefficient | 10348 of 14005 | | Weight | 8139 of 14005 | | Warranty | 9798 of 14005 | ## Pros - **Manufactured exclusively in Germany** - Heckert Solar is the only remaining PV module manufacturer with continuous production on German soil (plants in Chemnitz and Langenwetzendorf). All NeMo 3.0 120 M panels carry VDE certification (design, safety, salt spray, and ammonia resistance tests) and ISO 14001:2015 accreditation, providing full component traceability and above-average quality control unavailable from Asian manufacturers. - **microCELL TLS – microcracks mitigation** - Thermal laser separation (microCELL™ TLS) preserves the mechanical integrity of cut-cell edges in the half-cut configuration. The technology reduces microcrack initiation during shipping and thermal cycling, directly contributing to more stable energy output across the full 25-year linear power warranty period. - **Factory-fitted Stäubli MC4 connectors** - The NeMo 3.0 120 M ships with genuine Stäubli MC4 connectors as standard — the industry benchmark preferred by inverter and optimizer OEMs (SMA, Fronius, SolarEdge). This eliminates the need for adapter cables and reduces the risk of arc faults at the connector, one of the leading root causes of PV system fires. - **Premium-class mechanical resistance** - The datasheet confirms a snow load rating of 5,400 Pa and wind load of 2,400 Pa, supported by a 9-busbar cell layout that distributes mechanical stress. These values exceed the IEC 61215 minimums and are fully adequate for Polish snow-load zones I–III without additional racking reinforcement. - **Top Brand PV since 2015 + industry awards** - Heckert Solar has held the EuPD Research Top Brand PV seal continuously since 2015 and received industry recognition including the Sunsource Partner Award (2024), providing third-party validation of product and service quality. For installers and prosumers this translates into reduced warranty-dispute risk over the system lifetime. ## Cons - **Efficiency below two of three peers** - Maximum efficiency of the series is 20.0%, while direct peer comparable VDS-S120/M6H reaches 20.8% and Gamko GKA166M120 reaches 20.85%. On an identical module footprint (approx. 1,790×1,060 mm) this translates to roughly 4–4.3% less annual energy generation versus those competitors — equivalent to approximately 40–50 kWh/year difference on a 10 kWp system. - **Product warranty limited to 15 years** - The materials and workmanship warranty (physical defects, delamination, frame cracking) covers only 15 years, whereas Heckert's own newer Apollon series (TOPCon, 2025) already offers 30 years, and most Tier-1 competitors set 25 years as standard. For commercial installations with a planned 20–25 year depreciation period this creates an uncovered risk window. - **Not on BNEF Tier-1 bankable list** - Heckert Solar does not appear on the Bloomberg NEF Bankable Manufacturers (Tier-1) list, which can be a barrier in project-finance deals or performance-bond insurance requirements. The manufacturer compensates with Top Brand PV and VDE credentials, but certain EU fund regulations and commercial bank covenants explicitly require BNEF Tier-1 status. ## About this series The Heckert Solar NeMo® 3.0 120 M series is designed for high performance in real-world conditions, even in situations where there is occasional shading or reduced sunlight. The use of **monocrystalline PERC cells in a half-cut configuration** helps to minimize losses and stabilize energy production, even when roof conditions are not ideal. The refined **glass-foil** construction and robust frame make installation and ensure durability in the Polish climate. A key feature of this series is **microCELL TLS (thermo-laser separation)**, which is designed to enhance the mechanical strength of the cells and reduce the risk of microcracks during transport and operation. Another practical advantage is the **original cabling and MC4 (Stäubli) connectors**, which facilitate integration with modern inverters and optimizers. The NeMo® 3.0 120 M is a good choice for residential and commercial installations, where predictable performance, high-quality workmanship, and extended warranty protection are important. ## Notable figures - Efficiency of 20.0% is 0.6pp above the \*\*PERC 0-400W\*\* median (19.4%) - 200.3 W/m² power density - 5.9 W/m² more than \*\*PERC 0-400W\*\* median (194.4 W/m²), more power per roof area - Temperature coefficient of -0.34%/°C matches the \*\*PERC 0-400W\*\* median - In the top 87% for efficiency among all PERC panels ## Questions ### What warranty does the Heckert Solar NeMo® 3.0 120 M series come with? The NeMo® 3.0 120 M series includes a 15-year product warranty and a 25-year linear power warranty. The power guarantee covers at least 90% of rated output for the first 10 years and at least 80% for the full 25-year term. This places Heckert Solar among European manufacturers offering above-average long-term protection, backed by production at their factory in Germany. ### What is microCELL TLS technology in the NeMo® 3.0 120 M panels and why does it matter? microCELL TLS (thermal laser separation) is Heckert Solar's proprietary process that splits cells using a precisely controlled laser beam instead of mechanical cutting. This preserves the mechanical strength of each half-cut cell and significantly reduces the risk of microcracks during transport, installation, and long-term mechanical stress from wind, snow loads, or thermal cycling. ### Do the Heckert Solar NeMo® 3.0 120 M panels handle partial roof shading well? Yes. The 120-cell PERC half-cut layout splits the module into two independent electrical halves, so shading on one part of the roof limits output only in that segment rather than the entire panel. Three bypass diodes in the IP68 junction box further protect shaded cells from hotspot formation, resulting in higher annual energy yield on roofs with chimneys or dormers. ### What connectors do the NeMo® 3.0 120 M panels use and are they compatible with major inverters? The modules ship with genuine Stäubli MC4 connectors on 4 mm² cables (2×1150 mm). The MC4 format is the industry-standard interface compatible with inverters from SMA, Fronius, Growatt, Huawei, SolarEdge, and other leading brands. Using OEM Stäubli MC4 connectors rather than third-party substitutes reduces contact failure risk and speeds up installation. ### How do the Heckert Solar NeMo® 3.0 120 M panels perform in winter and overcast conditions? The monocrystalline PERC cells carry a power temperature coefficient of -0.339%/°C, meaning output can actually exceed STC-rated values on cold, sunny winter days. The 3.2 mm anti-reflective tempered glass improves energy yield under diffuse irradiance typical of Central European autumn and winter, making the NeMo® 3.0 120 M a solid choice for the Polish climate. ### Are Heckert Solar NeMo® 3.0 120 M panels a good fit for a residential pitched-roof system? Yes. At 1790×1060 mm and just 20.5 kg, they are straightforward to carry on a roof and mount on standard racking structures. The 380 Wp peak power allows a 6–10 kWp system to fit within a compact roof area. The glass-foil construction with a robust aluminum frame performs equally well in residential prosumer microinstallations and larger commercial rooftop or ground-mount arrays. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/836255148661f3574c1dd2-d3a17e8c154d.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, +3.1 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, lighter, +3.1 pp | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | Lighter, +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 | | [Maxeon SPR-MAX3-430-R](https://comparepv.com/panel/maxeon-spr-max3-430-r) | 430 W | Cooler, +2.7 pp, +15 yr warranty | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | Cooler, +2.6 pp, +15 yr warranty | | [Heckert Solar NeMo® 3.0 120 M 375](https://comparepv.com/panel/heckert-solar-nemo-3-0-120-m-375) | 375 W | Very close match | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +130 W, cooler, +5.0 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +115 W, cooler, +4.8 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +125 W, cooler, +4.7 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +110 W, cooler, +4.5 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +120 W, cooler, +4.5 pp | --- Source: https://comparepv.com/panel/heckert-solar-nemo-3-0-120-m-380 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.