--- title: "Gamko New Energy GKA157F300W 300W Solar Panel - Specs & Review | ComparePV" description: "Gamko New Energy GKA157F300W 300W solar panel. Specs: 20.43% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/gamko-new-energy-gka157f300w" updated: 2026-09-11 --- # Gamko New Energy GKA157F300W Space saver, no clear weak spot 1,792 panels in the 200-400 W band, all technologies ## Identity - **Manufacturer:** Gamko New Energy - **Model:** GKA157F300W - **Series:** GKA157F36S - **Rated power:** 300 W - **Cell technology:** Flexible ## How it compares Compared against 200-400 W band, all technologies (1792 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 300 W | 355 W | Weak - bottom 20% | | | Module efficiency | 20.43% | 19.40% | Strong - top 14% | 11,566 | | Power density | 204.3 | 193.8 | Strong - top 13% | 11,548 | | Temperature coefficient | - | -0.350 | | | | Weight (kg) | - | 20.8 kg | | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 17% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.43% | 19.40% | Strong - top 14% | 11,566 | | Power density | 204.3 | 193.8 | Strong - top 13% | 11,548 | | Temperature coefficient | - | -0.350 | | | | Weight per kWp | - | 59.4 | | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 17% | 21 | ### Strengths - **204.3 watts per square metre** - Top 13% of the 200-400 W band, against a median of 193.8. - **20.43% module efficiency** - Top 14% of the 200-400 W band, against a median of 19.40%. - **30 year performance warranty** - Top 17% of the 200-400 W band, against a median of 25 yrs. - **Best for:** Roofs where every square metre counts, small roofs that need every watt and owners who value a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 300 W - **Efficiency:** 20.43 % - **Voltage at Pmax (Vmp):** 27.94 V - **Current at Pmax (Imp):** 10.74 A - **Open-circuit voltage (Voc):** 33.53 V - **Short-circuit current (Isc):** 11.27 A - **Max system voltage:** 1000 V ### Temperature - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** Flexible ### Physical - **Length:** 1480 mm - **Width:** 992 mm - **Area:** 1.47 m2 - **Power density:** 204.3 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 11566 of 14005 | | Power density | 11548 of 14005 | | Temperature coefficient | 13924 of 14005 | | Weight | 13988 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Flexible Construction — Installation on Curved Surfaces** - The flexible module technology allows installation on curved substrates — RV rooftops, yacht decks, and trailers — without any structural modification to the vehicle. The absence of a rigid aluminum frame reduces module weight and eliminates the risk of damage from mechanical vibration, representing a key advantage over the frameless rigid alternatives from Solitek and DMEGC in this segment. - **Efficiency Up to 20.43% — Above Two-Thirds of Peer Comparables** - The peak efficiency of 20.43% (300 W variant) clearly outperforms the Solitek SOLID Agro Frameless (14.88%) and DMEGC Greenhouse (11.61%), placing the GKA157F36S series above the median of the compared products. In the flexible PERC module segment, where the market standard sits at 17–19%, a rating of 20.43% is genuinely competitive. - **30-Year Linear Power Output Warranty** - The manufacturer guarantees power output performance for 30 years — in the small flexible off-grid module segment, the standard warranty period is 10–25 years. This warranty is on par with Tier-1 rigid module manufacturers such as JA Solar (30 years), which is uncommon among smaller flexible panel producers. - **Native 36-Cell Configuration for 12 V Systems** - The F36S designation indicates a 36-cell layout that produces a Voc of ~22 V and a Vmpp of ~18 V — values natively compatible with both PWM and MPPT charge controllers for 12 V battery banks. This eliminates the need for DC-DC voltage converters in typical mobile off-grid installations, simplifying the BoS and reducing overall system cost. - **Wide Variant Range: 50–300 W (4 Models)** - Four power variants from 50 W to 300 W enable precise sizing for each application: 50 W for monitoring and autonomous lighting, 300 W for full power systems in RVs or on yachts. This allows installers to avoid over-sizing while maintaining a single product line. ## Cons - **Entry-Variant Efficiency: 13.67%** - The 50 W variant achieves only 13.67% efficiency — in space-constrained applications such as a yacht or a small RV, this translates to roughly 33% less energy yield per unit area compared to the 300 W variant (20.43%), and approximately 41% less than the JA Solar Monocrystalline72 (23.32%). Where mounting area is severely limited, selecting a higher-wattage variant within this series is strongly advisable. - **Product Warranty: 12 Years — Lower Bound of Market Range** - A 12-year product warranty represents the minimum acceptable threshold in the renewable energy industry. Leading Tier-1 manufacturers — JA Solar, LONGi, and Risen — typically offer 12–15 years, with some extending coverage to 25 years. Set against a 30-year linear power output warranty, the gap between the two warranty terms is substantial and poses a potential risk for installations with a long operational horizon. - **Gamko Not on BNEF Tier-1 List — Long-Term Risk** - Nantong Gamko New Energy does not appear on the Bloomberg NEF Tier-1 Module Manufacturers list. In the context of a 30-year power output warranty, the manufacturer's financial viability is critical — the absence of Tier-1 status implies an elevated risk that warranty claims may not be enforceable over the full warranty period. ## About this series The Gamko New Energy GKA157F36S series of photovoltaic panels is a specialized solution focused on maximum efficiency in low-voltage installations. Through the use of **advanced monocrystalline cells**, these modules generate a significant amount of energy even with limited exposure to direct sunlight. A key advantage of this series is its optimization for 12V systems, making it unrivaled in simple power supply systems without the need for expensive voltage regulators. The design is characterized by **exceptional resistance to mechanical loads** and harsh environmental conditions, guaranteeing stable operation for decades. This product effectively solves the problem of limited mounting space, offering a **high energy conversion efficiency** in an exceptionally compact form. It is an ideal choice for the mobile sector - motorhome and yacht owners - as well as for professional autonomous lighting or video monitoring systems. What distinguishes it from the competition is the **precise construction of the anodized aluminum frame**, which prevents corrosion even in salty or exceptionally humid climates. By choosing the GKA157F36S series, the user receives a product combining industrial durability with the lightness necessary for off-grid applications, ensuring full energy independence in all field conditions. ## Notable figures - At 20.4% efficiency, this panel is 1.7pp above typical \*\*Flexible 0-400W\*\* modules (median: 18.8%) - Power density of 204.3 W/m² packs 14.6 W/m² more into the same footprint vs \*\*Flexible 0-400W\*\* median (189.7 W/m²) - Ranked #11566 out of 14005 panels for efficiency in the database ## Questions ### What warranty is provided for the Gamko New Energy GKA157F36S panels? The GKA157F36S series comes with a 12-year product warranty covering material and workmanship defects, as well as a 30-year linear power output warranty. This means the panel will continue to generate power at the levels specified in the technical documentation for 30 years — a standard comparable to leading brands in the market. The warranty is fulfilled by the authorized distributor or by the manufacturer, Gamko New Energy. ### Are the GKA157F36S panels suitable for use in an RV or on a boat? Yes, the GKA157F36S series is specifically designed with such applications in mind. The modules are optimized for 12V systems, eliminating the need for additional voltage converters in a conventional RV or yacht installation. The anodized aluminum frame provides excellent corrosion resistance in high-humidity environments and in direct contact with salt water, while the compact dimensions make mounting straightforward on the limited roof area of a vehicle or boat deck. ### Does the PERC technology in the GKA157F36S series improve performance under cloudy conditions? PERC (Passivated Emitter and Rear Cell) cells feature enhanced photon capture efficiency thanks to a reflective layer on the rear side of the cell. In practice, this translates to better energy production under diffuse light and partial cloud cover compared to older standard BSF cells. The GKA157F36S series utilizes monocrystalline PERC technology, resulting in higher energy yield under the average solar irradiance conditions typical of Poland. ### What is the maximum power output of a GKA157F36S panel, and is it sufficient to power a standalone monitoring system? The maximum power output of a module in the GKA157F36S series is 300 Wp. For a typical video surveillance system — comprising 2–4 IP cameras, an NVR recorder, and a router — with a combined consumption of 30–60 W, a single panel paired with an appropriately sized battery bank and an MPPT charge controller will provide reliable around-the-clock power even during autumn months. For more demanding systems that include lighting or heating loads, a multi-module configuration is recommended. ### Are the Gamko New Energy GKA157F36S panels compatible with standard MPPT charge controllers and off-grid inverters? Yes, the GKA157F36S series is equipped with standard MC4 connectors, which are compatible with the vast majority of MPPT charge controllers and off-grid inverters available on the market — including those from Victron Energy, Epever, Renogy, and others. The optimization for 12V systems means that a single panel can be connected directly to a 12/24V charge controller without the need for series stringing, which greatly simplifies the installation. ### Can the GKA157F36S panel frame withstand snow loads and high winds? The GKA157F36S series features an anodized aluminum frame that provides high resistance to mechanical loads. PV modules in this class are standardly certified to IEC 61215, which includes snow load tests up to 5,400 Pa and wind load tests up to 2,400 Pa — corresponding to heavy snowfall and strong wind conditions. For installations in extreme locations, such as high-altitude mountain sites, it is advisable to verify the detailed mechanical parameters in the manufacturer's current datasheet before proceeding with the installation. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/GKA157F36-50-300W-7ee4a4c0c3a6.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-300MH-72](https://comparepv.com/panel/ja-solar-ns-300mh-72) | 300 W | +2.9 pp, -5 yr warranty | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | +2.9 pp, -5 yr warranty | | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | 280 W | -20 W, +2.9 pp | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | +30 W, +2.7 pp, -5 yr warranty | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | +30 W, +2.7 pp, -5 yr warranty | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | -15 W, +2.6 pp | | [Gamko New Energy GKA182M260W](https://comparepv.com/panel/gamko-new-energy-gka182m260w) | 260 W | -40 W, +2.6 pp | | [Gamko New Energy GKA182M270W](https://comparepv.com/panel/gamko-new-energy-gka182m270w) | 270 W | -30 W, +2.6 pp | | [Gamko New Energy GKA182M300W](https://comparepv.com/panel/gamko-new-energy-gka182m300w) | 300 W | +2.6 pp | | [JA Solar MYM2054-270](https://comparepv.com/panel/ja-solar-mym2054-270) | 270 W | -30 W, +0.8 pp, -5 yr warranty | | [MY Solar MYM2054-270](https://comparepv.com/panel/my-solar-mym2054-270) | 270 W | -30 W, +0.8 pp, -5 yr warranty | | [JA Solar MYP3054-270](https://comparepv.com/panel/ja-solar-myp3054-270) | 270 W | -30 W, -2.4 pp, -5 yr warranty | | [MY Solar MYP3054-270](https://comparepv.com/panel/my-solar-myp3054-270) | 270 W | -30 W, -2.4 pp, -5 yr warranty | | [JA Solar MYP3054-265](https://comparepv.com/panel/ja-solar-myp3054-265) | 265 W | -35 W, -2.8 pp, -5 yr warranty | | [MY Solar MYP3054-265](https://comparepv.com/panel/my-solar-myp3054-265) | 265 W | -35 W, -2.8 pp, -5 yr warranty | | [JA Solar MYP3054-260](https://comparepv.com/panel/ja-solar-myp3054-260) | 260 W | -40 W, -3.1 pp, -5 yr warranty | --- Source: https://comparepv.com/panel/gamko-new-energy-gka157f300w Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.