--- title: "Gamko New Energy GKA210N120-660 660W Solar Panel - Specs & Review | ComparePV" description: "Gamko New Energy GKA210N120-660 660W solar panel. Specs: 23.32% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/gamko-new-energy-gka210n120-660" updated: 2026-09-11 --- # Gamko New Energy GKA210N120-660 Light for its output, weak in heat 249 panels in the segment TOPCon 650-700 W ## Identity - **Manufacturer:** Gamko New Energy - **Model:** GKA210N120-660 - **Series:** GKA210N120 - **Rated power:** 660 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 650-700 W (249 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 660 W | 665 W | Typical | | | Module efficiency | 23.32% | 22.40% | Typical | 973 | | Power density | 233.2 | 223.7 | Typical | 1,089 | | Temperature coefficient | -0.340 | -0.290 | Weak - bottom 6% | 8,778 | | Weight (kg) | 28.0 kg | 34.6 kg | Strong - top 3% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.32% | 22.40% | Typical | 973 | | Power density | 233.2 | 223.7 | Typical | 1,089 | | Temperature coefficient | -0.340 | -0.290 | Weak - bottom 6% | 8,778 | | Weight per kWp | 42.4 | 53.2 | Strong - top 3% | 219 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **42.4 kg per kWp** - Top 3% of the TOPCon 650-700 W segment, against a median of 53.2. Ranked 219th in the whole database. ### Watch out for - **-0.340 %/°C temperature coefficient** - Bottom 6% of the TOPCon 650-700 W segment, against a median of -0.290. Ranked 8,778th in the whole database. - **Best for:** Commercial, utility-scale and shaded-installations. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 660 W - **Efficiency:** 23.32 % - **Voltage at Pmax (Vmp):** 35.79 V - **Current at Pmax (Imp):** 18.44 A - **Open-circuit voltage (Voc):** 42.95 V - **Short-circuit current (Isc):** 19.36 A ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 120 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2172 mm - **Width:** 1303 mm - **Thickness:** 30 mm - **Weight:** 28.0 kg - **Area:** 2.83 m2 - **Power density:** 233.2 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 % - **Annual degradation:** 0.45 % - **Output after 30 years:** 561 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 973 of 14005 | | Power density | 1089 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 219 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Up to 24.03% Efficiency — Above Mid-Range TOPCon** - The GKA210N120 series delivers module efficiency of 23.32–24.03%, clearly outperforming comparable models such as the SpolarPV SPV680 and Solaria panels (21.92%). The 2.1 percentage-point efficiency advantage translates to approximately 60 Wp of additional output from the same roof area at an equivalent nameplate power rating. - **N-type TOPCon Technology — Reduced LID Degradation** - N-type TOPCon cells exhibit minimal light-induced degradation (LID \<1%) and a more favorable temperature coefficient than legacy P-type PERC cells (~−0.35%/°C). Under typical Polish summer operating conditions with module temperatures of 60–70°C, this results in measurably higher annual energy yield. - **Bifacial Design — Additional Rear-Side Energy Harvest** - The bifacial module construction enables collection of albedo irradiance reflected from the ground surface. With a white roofing membrane or gravel ballast, this typically yields a 5–15% increase in energy output compared to monofacial modules of equivalent front-side power rating. - **30-Year Power Output Warranty** - The manufacturer provides a 30-year linear power warranty, exceeding the current market standard of 25 years offered by manufacturers such as JA Solar and Trina Solar. The extended warranty horizon improves project bankability in project finance structures. - **210 mm (M12) Cell Format — Lower BoS Costs** - The large-format M12 cells enable 660–680 Wp per module, reducing the total number of modules, connectors, and mounting hardware required for a given system capacity. For a 1 MWp ground-mount array, this equates to approximately 60–80 fewer modules compared to legacy 182 mm formats, directly lowering installation labor and balance-of-system costs. ## Cons - **No BNEF Tier 1 Status** - Gamko New Energy does not appear on the Bloomberg NEF Tier 1 module manufacturer list for Q1 2026 or Q2 2025. This is a practical constraint for utility-scale PV projects seeking financing from independent commercial lenders, which frequently require modules sourced from confirmed Tier 1 manufacturers as a condition of credit approval. - **Lower Efficiency Than Segment Leader AIKO ABC** - The direct competitor AIKO Comet 3N72 (ABC technology, 680 Wp) achieves 25.2% efficiency versus a maximum of 24.03% for the GKA210N120 — a gap of 1.17 percentage points. On a 100 m² roof, this corresponds to approximately 1.2 kWp less installed capacity, which may be a decisive factor where available roof area is severely constrained. ## About this series Gamko New Energy GKA210N120 series panels represent a breakthrough in energy efficiency thanks to the use of advanced **N-type TOPCon technology**. The use of large silicon cells in the **210 mm (M12)** format allows for achieving higher power density, which is crucial for limited installation space on the roofs of residential and commercial buildings. This series effectively eliminates the problem of rapid efficiency loss, offering users a **minimal level of light-induced degradation**, which translates into higher yields throughout the entire lifecycle of the installation. They stand out from the competition with excellent performance characteristics in diffuse light conditions and high resistance to extreme temperatures, allowing the system to produce more energy in Poland-s real-world weather conditions. These modules are dedicated to demanding investors who focus on **maximizing yields per square meter** while simultaneously reducing BOS system costs. Thanks to the innovative cell design, the GKA210N120 series ensures **exceptional mechanical stability** and resistance to micro-cracks, guaranteeing the safety and reliability of the investment for many years. This is a solution that combines modern engineering with economic viability, setting the direction for modern energy-efficient construction and professional solar farms. ## Notable figures - At 23.3% efficiency, this panel is 0.9pp above typical \*\*TOPCon 650-700W\*\* modules (median: 22.4%) - 233.2 W/m² power density - 9.5 W/m² more than \*\*TOPCon 650-700W\*\* median (223.7 W/m²), more power per roof area - Temperature coefficient of -0.34%/°C is 0.05pp worse than \*\*TOPCon 650-700W\*\* median (-0.29%/°C) - higher losses in summer heat - At 28.0 kg, this panel is 6.6 kg lighter than \*\*TOPCon 650-700W\*\* median (34.6 kg) - easier handling during installation - Ranked #973 out of 14005 panels for efficiency in the database ## Questions ### What warranty does Gamko New Energy offer on the GKA210N120 series panels? The GKA210N120 series comes with a 12-year product warranty covering manufacturing defects and a 30-year linear power output warranty. This means that for 30 years the manufacturer guarantees the module will maintain a specified minimum efficiency level. This is one of the longest power warranties available on the market, making this series particularly attractive from a long-term return-on-investment perspective. ### What is TOPCon technology and why are the Gamko GKA210N120 panels better than older PERC models? TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology that enables higher conversion efficiency — up to 23.18% for the GKA210N120 series. Compared to conventional PERC (P-type) modules, TOPCon panels exhibit lower light-induced degradation (LID), better performance at elevated temperatures, and a longer effective service life. In practical terms, this translates into greater total energy production over the entire operational lifetime of the installation. ### Are the Gamko GKA210N120 panels bifacial, and what does that mean for my installation? Yes, the GKA210N120 series consists of bifacial modules — the rear surface of the panel also absorbs light reflected from the ground, rooftop, or surrounding environment. Under favorable conditions (high-albedo surface, appropriate mounting angle) this can yield an additional 5–15% of energy output compared to conventional monofacial panels. Bifacial technology is especially beneficial in ground-mounted installations and on lighter-colored surfaces. ### Do the Gamko New Energy GKA210N120 panels perform well in winter and under the overcast conditions typical of Poland? Yes. Thanks to N-type TOPCon technology and large-format M12 cells (210 mm), the GKA210N120 series demonstrates excellent performance under diffuse irradiance conditions, which are characteristic of Polish autumn and winter. The modules have a low temperature coefficient, meaning reduced power losses on hot days and relatively strong output even under low-irradiance conditions. ### How many cells does the Gamko GKA210N120 panel contain, and what is its maximum power output? The GKA210N120 series comprises 120 silicon cells in the M12 format (210 mm) and achieves a maximum power output of 680 Wp. The large-format cells deliver higher power density within a relatively compact module footprint, which is a significant advantage where available mounting area is limited — such as on residential and commercial rooftops. ### Are the Gamko New Energy GKA210N120 panels still commercially available? Yes, the GKA210N120 series is currently in production — the manufacturer Gamko New Energy (Nantong, China) maintains ongoing production of this line. The modules can be purchased through authorized distributors in the European market. Before placing an order, it is advisable to confirm the availability of your preferred power variant with your chosen supplier, as inventory levels may vary. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/gka210n120-660-680w-e39c617968d3.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | -10 W, cooler, +1.9 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +20 W, cooler, +1.9 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +15 W, cooler, +1.7 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | -15 W, cooler, +1.7 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | Cooler, heavier, +1.7 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | Cooler, heavier, +1.6 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +10 W, cooler, +1.5 pp | | [Gamko New Energy GKA210M120-590W](https://comparepv.com/panel/gamko-new-energy-gka210m120-590w) | 590 W | -70 W, -2.5 pp | | [Gamko New Energy GKA210M120-595W](https://comparepv.com/panel/gamko-new-energy-gka210m120-595w) | 595 W | -65 W, -2.3 pp | | [Gamko New Energy GKA210M120-600W](https://comparepv.com/panel/gamko-new-energy-gka210m120-600w) | 600 W | -60 W, -2.1 pp | | [Gamko New Energy GKA210M120-605W](https://comparepv.com/panel/gamko-new-energy-gka210m120-605w) | 605 W | -55 W, -1.9 pp | | [Gamko New Energy GKA210M120-610W](https://comparepv.com/panel/gamko-new-energy-gka210m120-610w) | 610 W | -50 W, -1.8 pp | | [Gamko New Energy GKA210N120](https://comparepv.com/panel/gamko-new-energy-gka210n120) | 680 W | +20 W, +0.7 pp | | [Gamko New Energy GKA210N120-675](https://comparepv.com/panel/gamko-new-energy-gka210n120-675) | 675 W | +15 W, +0.5 pp | | [Q-SUN Solar QN-670HJT-01](https://comparepv.com/panel/q-sun-solar-qn-670hjt-01) | 670 W | Cooler, heavier, +0.4 pp | | [Gamko New Energy GKA210N120-670](https://comparepv.com/panel/gamko-new-energy-gka210n120-670) | 670 W | +10 W, +0.4 pp | --- Source: https://comparepv.com/panel/gamko-new-energy-gka210n120-660 Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.