--- title: "GCL NT10/72GDF-605W Solar Panel: Specs & Datasheet | ComparePV" description: "GCL NT10/72GDF-605W solar panel. Specs: 23.42% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/gcl-nt10-72gdf-605w" image: "https://comparepv.com/og/panel/gcl-nt10-72gdf-605w.png" updated: 2026-09-11 --- # GCL NT10/72GDF-605W Efficiency leader, no clear weak spot 1,085 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** GCL - **Model:** NT10/72GDF-605W - **Series:** SIROT Efficient NT10/72GDF - **Rated power:** 605 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 600-650 W (1085 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 605 W | 620 W | Weak - bottom 15% | | | Module efficiency | 23.42% | 22.80% | Strong - top 11% | 902 | | Power density | 234.2 | 227.7 | Strong - top 11% | 900 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight (kg) | 31.1 kg | 32.8 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.42% | 22.80% | Strong - top 11% | 902 | | Power density | 234.2 | 227.7 | Strong - top 11% | 900 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight per kWp | 51.4 | 53.1 | Typical | 4,824 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **23.42% module efficiency** - Top 11% of the TOPCon 600-650 W segment, against a median of 22.80%. - **234.2 watts per square metre** - Top 11% of the TOPCon 600-650 W segment, against a median of 227.7. - **Best for:** Utility-scale, commercial and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 605 W - **Efficiency:** 23.42 % - **Voltage at Pmax (Vmp):** 44.82 V - **Current at Pmax (Imp):** 13.50 A - **Open-circuit voltage (Voc):** 52.75 V - **Short-circuit current (Isc):** 14.28 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 144 - **Bifacial:** yes ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 31.1 kg - **Area:** 2.58 m2 - **Power density:** 234.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 529 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 902 of 14129 | | Power density | 900 of 14129 | | Temperature coefficient | 2220 of 14129 | | Weight | 4824 of 14129 | | Warranty | 21 of 14129 | ## Pros - **Segment-leading efficiency: 23.42%** - The module's peak efficiency of 23.42% outperforms direct competitors by nearly 2 percentage points: JS Solar JS210MHC120, LEDVANCE M585~605P60UB-SF-F3, and Hiwatt HW-M12/120H achieve only 21.37-21.4%. This represents a relative advantage of approximately 9.5%, translating into significantly higher energy yield from the same rooftop or ground-mount area. - **Low temperature coefficient: -0.29%/°C** - The power temperature coefficient of -0.29%/°C (ENF Solar data, 580-605 W datasheet) is notably better than that of typical PERC modules (-0.35%/°C). In a Polish climate, where cell temperatures peak at approximately 70°C, this difference delivers a real-world yield improvement of roughly 1.8-2.5 percentage points during summer compared to older technology. - **N-type TOPCon: low LID and high bifacial factor** - N-type TOPCon cells exhibit negligible light-induced degradation (LID \<0.5%) and eliminate the LeTID effect known from PERC modules. The bifacial construction, with a confirmed bifaciality factor of ~80%, enables an additional 10-20% energy gain from ground-reflected irradiance in ground-mount installations with a high-albedo surface. - **30-year linear power warranty (87.4%)** - GCL guarantees a minimum of 87.4% of nominal power output after 30 years of operation, directly reducing the LCOE for utility-scale solar farms and commercial installations. Competitors in the same price tier (e.g., Jinko Tiger Neo) offer an equivalent warranty structure - 12-year product warranty plus 30-year linear power warranty - confirming this as the market benchmark for the premium segment. - **GCL-SI Tier 1 BNEF, #2 globally by manufacturing capacity** - GCL System Integration Technology has appeared on the Bloomberg NEF Tier 1 list for multiple consecutive quarters and ranks 2nd worldwide in PV module manufacturing capacity. Tier 1 status is required by most institutions financing solar projects under non-recourse structures, which streamlines bankability for utility-scale projects built around this series. ## Cons - **Weight 31.1 kg - a constraint for rooftop applications** - The dual-glass construction (2 mm glass on both sides) results in a module weight of 31.1 kg (dimensions 2278×1134×30 mm), approximately 25-40% heavier than typical glass-backsheet modules in this power class (~22-25 kg). This may be a limiting factor for retrofits on older rooftops with low load-bearing capacity, and it increases the cost and logistical complexity of installation on commercial and industrial buildings. ## About this series The GCL SIROT Efficient NT10/72GDF panel series is based on advanced **N-type cells made with TOPCon technology**, which represents a significant step forward in the efficiency of photovoltaic systems. The **bifacial dual glass** design allows for the effective use of light reflected from the ground, which, combined with higher conversion efficiency, translates into a much higher energy yield from a given area compared to standard modules. Thanks to the use of reinforced glass on both sides, these panels exhibit extreme resistance to weather conditions and **minimal light- and temperature-induced degradation**, guaranteeing stable power for long decades. This solution is dedicated primarily to large solar farms and demanding industrial installations, where the key is to maximize the reduction of the LCOE ratio. What sets the NT10/72GDF series apart from the competition is its exceptionally low temperature coefficient of power, allowing it to maintain high performance parameters even on hot days. By choosing these modules, investors receive a product with **exceptional mechanical durability** that effectively eliminates the problem of micro-cracks and premature component wear in harsh environmental conditions. This innovative series combines the safety of the double-glazed design with state-of-the-art cell architecture, offering one of the highest power densities currently available on the global market. ## Notable figures - At 23.4% efficiency, this panel is 0.6pp above typical \*\*TOPCon 600-650W\*\* modules (median: 22.8%) - Power density of 234.2 W/m² packs 6.5 W/m² more into the same footprint vs \*\*TOPCon 600-650W\*\* median (227.7 W/m²) - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 600-650W\*\* median - Weight of 31.1 kg (1.7 kg below \*\*TOPCon 600-650W\*\* median of 32.8 kg) allows easier transport and roof mounting - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface ## Questions ### What warranty covers the GCL SIROT Efficient NT10/72GDF panels and what does it include? The GCL SIROT Efficient NT10/72GDF series is backed by a 12-year product warranty covering material defects and workmanship, along with a 30-year linear power output warranty. The manufacturer guarantees that after 30 years of operation the panels will retain at least 87.4% of their nominal power. Such an extended warranty horizon is one of the key arguments for selecting this series in utility-scale solar farm projects with long-term financing structures. ### What is TOPCon technology and why is it preferable to standard PERC in the NT10/72GDF series? TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology in which a thin tunnel oxide layer reduces carrier recombination losses. In practice, this translates to higher module efficiency - reaching up to 23.42% in the NT10/72GDF series - and a lower power temperature coefficient of just -0.29%/°C. PERC modules based on P-type cells lose significantly more power under high-temperature conditions, which makes the NT10/72GDF a superior choice for warm climates and large-scale PV farms. ### Is the 605 Wp GCL NT10/72GDF module suitable for a residential rooftop, or is it exclusively a utility-scale product? The NT10/72GDF module weighs approximately 31-33 kg and measures 2279 x 1134 x 30 mm, making it a large, heavy-format product intended primarily for utility-scale solar farms and commercial/industrial installations. For a typical pitched roof on a single-family home, smaller prosumer-grade modules are a better fit. That said, if the building features a flat roof or large roof sections with adequate structural load capacity, installation of the NT10/72GDF is technically feasible following consultation with a structural engineer. ### How do the bifacial GCL NT10/72GDF panels work and how much additional energy can be harvested from the rear side of the module? The bifacial dual-glass design allows the panel to collect irradiance from both the front and rear surfaces. The rear side absorbs light reflected from the ground surface (albedo). With high-reflectivity surfaces - such as light gravel, concrete, or snow - the additional energy yield from bifaciality can range from 5% to as much as 20% compared to a monofacial module. The bifacial gain is best utilized in ground-mounted solar farms with sufficient mounting height clearance and bright, high-albedo ground cover. ### Is GCL a proven PV manufacturer and does its Tier 1 classification provide investment security? GCL System Integration Technology is one of the world's largest manufacturers of PV cells and modules, independently classified as a Tier 1 manufacturer by recognized rating agencies. This classification confirms the company's financial strength, production stability, and bankability for credit-financed projects. The company is headquartered in China, and its modules carry IEC 61215, IEC 61730, ISO 9001, and ISO 14001 certifications, all of which are required to meet European market regulatory standards. ### How do the GCL NT10/72GDF modules perform under high winds, heavy snow loads, and extreme weather conditions? Thanks to the dual-glass construction - which eliminates the traditional polymer backsheet - the NT10/72GDF series achieves exceptional mechanical resilience. The modules withstand snow loads of up to 5,400 Pa and wind loads of up to 2,400 Pa. Having tempered glass on both sides eliminates the delamination and micro-crack issues commonly associated with backsheet-based modules, resulting in a longer service life across demanding climatic conditions - from harsh winters to scorching summers. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/EN-NT1072GDF_10-J2-9f8534edafd7.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +45 W, lighter, +1.8 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +40 W, lighter, +1.6 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | -45 W, lighter, +1.4 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +35 W, lighter, +1.4 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | -50 W, lighter, +1.2 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +30 W, lighter, +1.2 pp | | [GCL GCL-M10/72GDF-540](https://comparepv.com/panel/gcl-gcl-m10-72gdf-540) | 540 W | -65 W, hotter, -2.5 pp | | [GCL GCL-M10/72GDF-545](https://comparepv.com/panel/gcl-gcl-m10-72gdf-545) | 545 W | -60 W, hotter, -2.3 pp | | [GCL GCL-M10/72GDF-550](https://comparepv.com/panel/gcl-gcl-m10-72gdf-550) | 550 W | -55 W, hotter, -2.1 pp | | [GCL GCL-M10/72GDF-555](https://comparepv.com/panel/gcl-gcl-m10-72gdf-555) | 555 W | -50 W, hotter, -1.9 pp | | [GCL GCL-M10/72H-560](https://comparepv.com/panel/gcl-gcl-m10-72h-560) | 560 W | Hotter, -1.7 pp, -5 yr warranty | | [GCL GCL-M10/72H-565](https://comparepv.com/panel/gcl-gcl-m10-72h-565) | 565 W | Hotter, -1.6 pp, -5 yr warranty | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +25 W, cooler, +1.0 pp | --- Source: https://comparepv.com/panel/gcl-nt10-72gdf-605w 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.