--- title: "Gamko New Energy GKA166M120-370W Solar Panel: Specs & Datasheet | ComparePV" description: "Gamko New Energy GKA166M120-370W solar panel. Specs: 20.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/gamko-new-energy-gka166m120-370w" image: "https://comparepv.com/og/panel/gamko-new-energy-gka166m120-370w.png" updated: 2026-09-11 --- # Gamko New Energy GKA166M120-370W Light for its output, no clear weak spot 579 panels in the segment PERC 350-400 W ## Identity - **Manufacturer:** Gamko New Energy - **Model:** GKA166M120-370W - **Series:** GKA166M120 (360W–380W) - **Rated power:** 370 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) | 370 W | 380 W | Typical | | | Module efficiency | 20.30% | 19.90% | Strong - top 16% | 11,851 | | Power density | 203.0 | 199.0 | Strong - top 16% | 11,858 | | Temperature coefficient | -0.360 | -0.350 | Typical | 12,425 | | Weight (kg) | 18.0 kg | 21.4 kg | Strong - top 2% | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 13% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.30% | 19.90% | Strong - top 16% | 11,851 | | Power density | 203.0 | 199.0 | Strong - top 16% | 11,858 | | Temperature coefficient | -0.360 | -0.350 | Typical | 12,425 | | Weight per kWp | 48.6 | 55.8 | Strong - top 2% | 2,404 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 13% | 21 | ### Strengths - **48.6 kg per kWp** - Top 2% of the PERC 350-400 W segment, against a median of 55.8. Ranked 2,404th in the whole database. - **30 year performance warranty** - Top 13% of the PERC 350-400 W segment, against a median of 25 yrs. - **203.0 watts per square metre** - Top 16% of the PERC 350-400 W segment, against a median of 199.0. - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 370 W - **Efficiency:** 20.30 % - **Voltage at Pmax (Vmp):** 34.13 V - **Current at Pmax (Imp):** 10.84 A - **Open-circuit voltage (Voc):** 41.18 V - **Short-circuit current (Isc):** 11.34 A ### Temperature - **Temperature coefficient of Pmax:** -0.360 %/degC - **Temperature coefficient of Voc:** -0.280 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 120 ### Physical - **Length:** 1756 mm - **Width:** 1038 mm - **Thickness:** 30 mm - **Weight:** 18.0 kg - **Area:** 1.82 m2 - **Power density:** 203.0 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 2.00 % - **Output after 30 years:** 314 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 11851 of 14129 | | Power density | 11858 of 14129 | | Temperature coefficient | 12425 of 14129 | | Weight | 2404 of 14129 | | Warranty | 21 of 14129 | ## Pros - **Module efficiency up to 20.85% - above comparable peers** - The top-tier variant in the series achieves 20.85% module efficiency, outperforming direct peer comparables such as the Heckert Solar NeMo® 3.0 120 M (20.0%) and matching the VDS-S120/M6H (20.8%). For rooftop installations with limited available area, this translates into meaningfully higher energy yield. - **30-year linear power output warranty** - The manufacturer provides a 30-year linear warranty on power output, a requirement increasingly mandated by banks financing both prosumer and commercial PV installations. The warranty aligns with the current mid-range segment standard for PERC modules. - **120 half-cut PERC cell configuration** - Splitting the module into three independent sections (3 × 40 cells) limits partial-shading losses to one-third of the module area, making it well-suited to the MPPT inverters widely available in the Polish market. The half-cut cell technology also reduces resistive heating at interconnections under load. - **Mechanical durability backed by certifications** - IEC 61215 certification confirms resistance to wind loads of 2,400 Pa and snow loads of 5,400 Pa - values sufficient for Polish climatic conditions (normative snow load for most of Poland: 1,200-2,000 Pa per PN-EN 1991-1-3). Additional IEC 61730 and ISO 9001 certifications, together with verified resistance to salt mist and ammonia, further substantiate product reliability. ## Cons - **PERC technology - an aging standard** - PERC cells exhibit a higher first-year light-induced degradation (LID) rate (~2%) compared to modern N-type TOPCon cells (~1%), with annual energy yield estimated to be 1.5-2.5% lower according to industry analyses (PV Tech, SolarNPlus 2025). Over a 30-year system lifetime, the cumulative generation gap relative to TOPCon modules of equivalent rated power can amount to several hundred kWh per kWp. - **12-year product warranty - below market standard** - The product warranty stands at 12 years, whereas leading Tier-1 manufacturers - including Jinko Solar, JA Solar, and LONGi - routinely offer 15-year product warranties on modules in a comparable power class. For commercial installations subject to insurer or lender requirements, a 12-year warranty may prove insufficient. - **Manufacturer absent from Tier-1 BNEF / BloombergNEF rankings** - Gamko New Energy (Nantong), with annual production capacity of approximately 1.2 GW, does not appear on the BloombergNEF or Wood Mackenzie H1 2025 Tier-1 module manufacturer lists, implying elevated long-term manufacturer financial risk. For investors requiring bankability due diligence, this represents a material limitation. ## About this series The Gamko New Energy GKA166M120 (360W-380W) series is a range of modules designed for real-world installation conditions - where stable output, low losses, and predictability over the long term are key. The use of monocrystalline PERC technology enhances performance in low-light conditions and cooler weather, which is important in the Polish climate. The 120-cell design helps to minimize losses in partially shaded conditions and facilitates matching with popular inverters. The low temperature coefficient also helps to maintain performance in hot conditions on a roof. The panel features a robust front glass, which helps to ensure durability in windy, snowy, and hail conditions. This is a good choice for single-family homes, small businesses, and rooftop and ground-mounted installations, where a long power warranty and trouble-free operation are important. ## Notable figures - Efficiency of 20.3% is 0.9pp above the \*\*PERC 0-400W\*\* median (19.4%) - Power density of 203.0 W/m² packs 8.8 W/m² more into the same footprint vs \*\*PERC 0-400W\*\* median (194.2 W/m²) - At -0.36%/°C, hot weather performance is typical for \*\*PERC 0-400W\*\* panels - 18.0 kg weight - 2.5 kg lighter than \*\*PERC 0-400W\*\* median (20.5 kg), reducing installation effort - Ranked #11851 out of 14129 panels for efficiency in the database ## Questions ### What warranty coverage applies to Gamko New Energy GKA166M120 panels? The GKA166M120 series is backed by a 12-year product warranty covering manufacturing defects and material failures, along with a 30-year linear power output warranty. This means the manufacturer guarantees that the module will maintain a specified performance level over three decades of operation. This is among the longer power warranties currently available on the market and is a significant factor when calculating the return on investment for a residential photovoltaic system. ### Do Gamko GKA166M120 panels perform well in winter and under overcast conditions typical of Poland? Yes, the monocrystalline PERC cell technology used in the GKA166M120 series improves efficiency under low-irradiance conditions and at low temperatures - both of which are relevant in Poland's climate, where overcast days are frequent. The low temperature coefficient means the module loses power more slowly during summer roof-level heat buildup, while in winter and during transitional seasons, energy yield remains comparatively stable. ### Is the GKA166M120 series (380 W) compatible with popular inverters such as SMA, Fronius, or Huawei? The 120-cell configuration of the GKA166M120 series produces electrical parameters that are well-matched to most widely used single-phase and three-phase inverters available in Poland, including models from SMA, Fronius, Huawei, and Sofar. Before purchasing, however, it is always advisable to verify the panel's Voc and Isc values from the datasheet against the specific inverter's input voltage and current range to ensure an optimal system match. ### Can Gamko GKA166M120 panels withstand strong wind loads and snow loads on a Polish rooftop? The GKA166M120 series is certified for a wind load of up to 2,400 Pa and a snow load of up to 5,400 Pa. The robust front glass further enhances the module's mechanical resistance. These ratings meet the structural requirements for the vast majority of installation sites across Poland, including mountainous regions with heavier snowfall and areas with elevated wind exposure. ### Are the GKA166M120 panels (360 W-380 W) suitable for pitched roofs on single-family homes? Yes, the GKA166M120 series is designed with prosumer installations in mind, including pitched roofs on single-family homes. The 120-cell layout minimizes power losses under partial shading conditions, such as those caused by a chimney or dormer window. Modules rated up to 380 W are well-suited to both small and medium-sized systems, and their electrical parameters are compatible with the mounting structures commonly used on tile and metal sheet roofs. ### What is PERC technology and why is it worth choosing in Gamko GKA166M120 panels? PERC (Passivated Emitter and Rear Cell) is an enhanced monocrystalline cell design that incorporates an additional passivation layer on the rear surface. This layer reflects unabsorbed photons back into the cell and reduces electron recombination. In practice, PERC modules such as the GKA166M120 achieve higher efficiency than standard mono modules, perform better under diffuse light conditions, and degrade more slowly over time - all of which have a direct positive impact on long-term energy production. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/GKA166M120-360-380W-ff30edeca343.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Cooler, +2.8 pp, -5 yr warranty | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, +2.8 pp, -5 yr warranty | | [Gamko New Energy GKA210M320W](https://comparepv.com/panel/gamko-new-energy-gka210m320w) | 320 W | -50 W, lighter, +2.7 pp | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | -30 W, lighter, +2.7 pp | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | -10 W, lighter, +2.7 pp | | [Gamko New Energy GKA210M380W (1/4\*4\*38)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-4-4-38) | 380 W | +10 W, +2.7 pp | | [Gamko New Energy GKA210M400W (1/2\*4\*20)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-2-4-20) | 400 W | +30 W, +2.7 pp | | [Gamko New Energy GKA210M400W (1/4\*4\*40)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-4-4-40) | 400 W | +30 W, +2.7 pp | | [Gamko New Energy GKA210M380W (1/2\*4\*19)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-2-4-19) | 380 W | +10 W, +2.7 pp | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | Cooler, +2.3 pp, +10 yr warranty | | [Gamko New Energy GKA166M120-360W](https://comparepv.com/panel/gamko-new-energy-gka166m120-360w) | 360 W | -10 W, -0.6 pp | | [Gamko New Energy GKA166M120-365W](https://comparepv.com/panel/gamko-new-energy-gka166m120-365w) | 365 W | -0.3 pp | | [Gamko New Energy GKA166M120-375W](https://comparepv.com/panel/gamko-new-energy-gka166m120-375w) | 375 W | +0.3 pp | | [Gamko New Energy GKA166M120-380W](https://comparepv.com/panel/gamko-new-energy-gka166m120-380w) | 380 W | +10 W, +0.6 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +140 W, cooler, +4.7 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +125 W, cooler, +4.5 pp | --- Source: https://comparepv.com/panel/gamko-new-energy-gka166m120-370w Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.