--- title: "Gamko New Energy GKA157M72-405W Solar Panel: Specs & Datasheet | ComparePV" description: "Gamko New Energy GKA157M72-405W solar panel. Specs: 20.87% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/gamko-new-energy-gka157m72-405w" image: "https://comparepv.com/og/panel/gamko-new-energy-gka157m72-405w.png" updated: 2026-09-11 --- # Gamko New Energy GKA157M72-405W Warranty pick, weak in heat 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Gamko New Energy - **Model:** GKA157M72-405W - **Series:** GKA157M - **Rated power:** 405 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) | 405 W | 410 W | Typical | | | Module efficiency | 20.87% | 20.60% | Typical | 10,407 | | Power density | 208.7 | 206.2 | Typical | 10,370 | | Temperature coefficient | -0.360 | -0.350 | Weak - bottom 15% | 12,425 | | Weight (kg) | 21.0 kg | 22.0 kg | Typical | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 17% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.87% | 20.60% | Typical | 10,407 | | Power density | 208.7 | 206.2 | Typical | 10,370 | | Temperature coefficient | -0.360 | -0.350 | Weak - bottom 15% | 12,425 | | Weight per kWp | 51.9 | 53.0 | Typical | 5,262 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 17% | 21 | ### Strengths - **30 year performance warranty** - Top 17% of the PERC 400-450 W segment, against a median of 25 yrs. ### Watch out for - **-0.360 %/°C temperature coefficient** - Bottom 15% of the PERC 400-450 W segment, against a median of -0.350. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 405 W - **Efficiency:** 20.87 % - **Voltage at Pmax (Vmp):** 41.70 V - **Current at Pmax (Imp):** 9.71 A - **Open-circuit voltage (Voc):** 50.90 V - **Short-circuit current (Isc):** 10.15 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:** 60 ### Physical - **Length:** 1956 mm - **Width:** 992 mm - **Thickness:** 30 mm - **Weight:** 21.0 kg - **Area:** 1.94 m2 - **Power density:** 208.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 82.6 % - **First-year degradation:** 3.00 % - **Annual degradation:** 0.50 % - **Output after 30 years:** 334 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10407 of 14129 | | Power density | 10370 of 14129 | | Temperature coefficient | 12425 of 14129 | | Weight | 5262 of 14129 | | Warranty | 21 of 14129 | ## Pros - **Up to 21.13% Efficiency with Half-Cut PERC Technology** - A peak efficiency of 21.13% positions the GKA157M series above the median for the Half-Cut PERC segment (~19.5-20.5%). The half-cut cell architecture reduces resistive losses and mitigates the impact of partial shading - each half of the module operates independently, translating into measurably higher annual energy yield under non-ideal exposure conditions. - **30-Year Linear Power Warranty** - The manufacturer guarantees a 30-year performance warranty, exceeding the 25-year standard offered by many mid-tier producers. For residential prosumer and commercial installations with long payback horizons (>15 years), the extended power coverage materially reduces the financial risk associated with long-term degradation. - **Full Protection Against PID** - Built-in resistance to Potential-Induced Degradation is critical in string systems operating at high DC system voltages (up to 1,000 V DC). Eliminating PID removes the scenario in which modules lose 10-30% of rated power after 5-7 years of operation due to ion migration through the laminate. - **IEC 61215 & IEC 61730 Certification and Mechanical Durability** - The series carries IEC 61215 (performance) and IEC 61730 (safety) certifications and, according to ENF Solar data, withstands snow loads of 5,400 Pa and wind loads of 2,400 Pa. Under Polish climatic conditions (snow load zones II-III per PN-EN 1991-1-3), this mechanical rating is a critical parameter for long-term installation reliability. - **Wide Power Range: 320-410 Wp Across 10 Variants** - Availability of 10 variants spanning 320 to 410 Wp allows the module to be matched to roof-area constraints and project requirements without resorting to a different series. This is particularly valuable for installations where the number of panels is limited by available roof space. ## Cons - **PERC vs. N-Type TOPCon - a Technology Gap Relative to Competitors** - In the same power class (410 Wp), the peer-comparable Luxor Solar Eco Line offers N-type TOPCon technology in a bifacial module with 21.33% efficiency versus a maximum of 21.13% for the GKA157M. More significantly, TOPCon cells exhibit lower first-year light-induced degradation (LID) (~1% vs. ~2% for PERC) and a lower annual degradation rate (~0.4% vs. ~0.6-0.8%), resulting in meaningfully higher cumulative energy yield over 30 years. The global module market passed an inflection point in 2024 - TOPCon's share of new production capacity exceeded 66%, displacing PERC. - **No Bifacial Version Available** - The GKA157M is a monofacial module, whereas Luxor Solar offers a bifacial variant in the identical price and power segment (410 Wp), capturing additional rear-surface yield (typically +5-15% with optimal ground albedo). The absence of a bifacial option forecloses higher annual energy yield in ground-mount installations and on lighter roofing surfaces at no additional cost. - **Manufacturer Not Listed on BNEF/Bloomberg Tier-1** - Nantong Gamko New Energy (manufacturing capacity ~1.2 GW as of 2023) does not appear on the Bloomberg NEF Tier-1 list, which reflects a manufacturer's creditworthiness and financial stability. For installations with a 25-30-year service life, the manufacturer's continued market presence at the time warranty claims are filed is a tangible risk - particularly given the ongoing consolidation within the module industry. ## About this series Gamko New Energy GKA157M series photovoltaic panels utilize advanced **monocrystalline cells in PERC technology**, which directly translates to high energy conversion efficiency even in diffused light. A key advantage of this line is the use of a **Half-Cut design**, which divides the module into two independent parts, significantly reducing power losses caused by partial shading and lowering the cell operating temperature. Thanks to this, the user gains more stable electricity production in real operating conditions. The solid construction made of tempered glass and a reinforced frame provides exceptional **resistance to extreme mechanical loads**, which is critical in the Polish climate characterized by strong gales and snowfall. The GKA157M series solves the problem of long-term component degradation through full **protection against the PID effect**, guaranteeing consistent electrical parameters for decades. This solution is dedicated to both modern home installations and extensive industrial systems, where the priority is the highest cost-effectiveness ratio. What distinguishes these panels from standard solutions is the **optimized temperature coefficient**, which minimizes performance drops during summer heat waves, making this series one of the most reliable choices on the photovoltaic market. ## Notable figures - At 20.9% efficiency, this panel is on par with typical \*\*PERC 400-450W\*\* modules - Power density of 208.7 W/m² matches the \*\*PERC 400-450W\*\* median - At -0.36%/°C, hot weather performance is typical for \*\*PERC 400-450W\*\* panels - Weight of 21.0 kg is typical for \*\*PERC 400-450W\*\* panels - In the top 74% for efficiency among all PERC panels ## Questions ### Are the Gamko New Energy GKA157M panels still available for purchase? The GKA157M series has been discontinued and is no longer actively distributed by Gamko New Energy. If you are set on panels from the same manufacturer with PERC Half-Cut technology, it is worth contacting a distributor to check stock availability or considering a newer series with comparable specifications. Purchasing modules from a discontinued line may also complicate future system expansion, as sourcing identical modules for additional strings becomes progressively more difficult over time. ### What warranty is provided for the Gamko New Energy GKA157M photovoltaic panels? The manufacturer provides a 12-year product warranty covering manufacturing defects and material failures. In addition, the GKA157M series is backed by a 30-year linear power output warranty, guaranteeing that the module maintains a specified minimum performance level throughout three decades of operation. This warranty scope is consistent with premium-tier modules and provides a solid basis for calculating the long-term return on investment. ### What does PERC Half-Cut technology offer in the GKA157M panels, and is the premium justified? PERC Half-Cut cells deliver two independent performance improvements. PERC (Passivated Emitter and Rear Cell) enhances conversion efficiency by reflecting unabsorbed light back into the cell, which is particularly beneficial under diffuse irradiance and overcast conditions. Half-Cut technology splits the module into two electrically independent halves, so partial shading from a chimney or dormer window affects only half the panel rather than the entire module. The combined result is measurably higher real-world energy yield compared to conventional full-cell PERC modules. ### What is the peak power output of the GKA157M panel, and how many modules are needed for a typical single-family home? A single GKA157M panel has a peak power output of 410 Wp. For an average single-family home consuming approximately 4,000-5,000 kWh per year, a system capacity of 5-7 kWp is typically required, corresponding to 13 to 17 modules from this series. The exact number depends on annual energy consumption, roof orientation and tilt, local solar irradiance, and the usable area of the roof surface. ### Can the GKA157M panels withstand a Polish winter - heavy snow loads and strong winds? Yes, the GKA157M series is constructed with tempered glass and a reinforced aluminum frame, providing high resistance to the mechanical loads typical of the Polish climate. The modules are rated to withstand significant snow accumulation as well as strong wind gusts. The optimized temperature coefficient further limits efficiency losses both during summer heat and on cold but sunny winter days, ensuring stable performance across the full range of seasonal conditions. ### Are the Gamko New Energy GKA157M panels resistant to the PID effect, and what does this mean for the installation? The GKA157M series incorporates full protection against Potential Induced Degradation (PID), a gradual power loss mechanism caused by high system voltages combined with moisture ingress into the cell structure. As a result, the panels maintain their rated electrical parameters throughout their entire operational lifetime without significant deterioration. This is particularly important in large-scale string-inverter systems operating at DC bus voltages above 600 V, where PID susceptibility would otherwise pose a substantial long-term yield risk. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/pdf-6146054be0f8.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-455-MAH54Db](https://comparepv.com/panel/aiko-aiko-455-mah54db) | 455 W | +50 W, cooler, +2.4 pp | | [Longi Solar LR5-54HTH-455M](https://comparepv.com/panel/longi-lr5-54hth-455m) | 455 W | +50 W, cooler, +2.4 pp | | [Yingli YL455CF54 e/2](https://comparepv.com/panel/yingli-yl455cf54-e-2) | 455 W | +50 W, cooler, +2.4 pp | | [Einnova Solarline ESM-455T](https://comparepv.com/panel/einnova-solarline-esm-455t) | 455 W | +50 W, cooler, +2.4 pp | | [SunEvo Solar SE5-54HBC-455W](https://comparepv.com/panel/sunevo-solar-se5-54hbc-455w) | 455 W | +50 W, cooler, +2.4 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 | +50 W, cooler, +2.4 pp | | [Luxor Solar LX-455M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-455m-182r-96-gg) | 455 W | +50 W, cooler, +2.4 pp | | [Gamko New Energy GKA157M72-390W](https://comparepv.com/panel/gamko-new-energy-gka157m72-390w) | 390 W | -15 W, -0.8 pp | | [Gamko New Energy GKA157M72-395W](https://comparepv.com/panel/gamko-new-energy-gka157m72-395w) | 395 W | -10 W, -0.5 pp | | [Gamko New Energy GKA157M72-400W](https://comparepv.com/panel/gamko-new-energy-gka157m72-400w) | 400 W | -0.3 pp | | [Maxeon SPR-MAX7-475](https://comparepv.com/panel/maxeon-spr-max7-475) | 475 W | Cooler, +3.1 pp, +10 yr warranty | | [Maxeon SPR-MAX7-470](https://comparepv.com/panel/maxeon-spr-max7-470) | 470 W | Cooler, +2.8 pp, +10 yr warranty | | [Maxeon SPR-MAX7-465](https://comparepv.com/panel/maxeon-spr-max7-465) | 465 W | Cooler, +2.6 pp, +10 yr warranty | | [Maxeon SPR-MAX6-440](https://comparepv.com/panel/maxeon-spr-max6-440) | 440 W | Cooler, +1.9 pp, +10 yr warranty | | [Maxeon SPR-MAX6-435](https://comparepv.com/panel/maxeon-spr-max6-435) | 435 W | Cooler, +1.6 pp, +10 yr warranty | | [Lina Energy LEPV 132 ULTRA PREMIUM BLACK 440Wp (LEPV 440)](https://comparepv.com/panel/lina-energy-lepv-132-ultra-premium-black-440wp-lepv-440) | 440 W | +35 W, cooler, +1.5 pp | --- Source: https://comparepv.com/panel/gamko-new-energy-gka157m72-405w Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.