--- title: "GCL GCL-M10/54GDF-400 Solar Panel: Specs & Datasheet | ComparePV" description: "GCL GCL-M10/54GDF-400 solar panel. Specs: 20.10% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/gcl-gcl-m10-54gdf-400" image: "https://comparepv.com/og/panel/gcl-gcl-m10-54gdf-400.png" updated: 2026-09-11 --- # GCL GCL-M10/54GDF-400 Warranty pick, heavy for its output 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** GCL - **Model:** GCL-M10/54GDF-400 - **Series:** GCL-M10/54GDF-B - **Rated power:** 400 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 400-450 W (954 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 400 W | 410 W | Weak - bottom 9% | | | Module efficiency | 20.10% | 20.60% | Weak - bottom 16% | 12,187 | | Power density | 201.3 | 206.2 | Weak - bottom 17% | 12,160 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,489 | | Weight (kg) | 25.3 kg | 22.0 kg | Weak - bottom 4% | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 17% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.10% | 20.60% | Weak - bottom 16% | 12,187 | | Power density | 201.3 | 206.2 | Weak - bottom 17% | 12,160 | | Temperature coefficient | -0.350 | -0.350 | Typical | 10,489 | | Weight per kWp | 63.2 | 53.0 | Weak - bottom 4% | 12,974 | | 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 - **63.2 kg per kWp** - Bottom 4% of the PERC 400-450 W segment, against a median of 53.0. Ranked 12,974th in the whole database. - **20.10% module efficiency** - Bottom 16% of the PERC 400-450 W segment, against a median of 20.60%. - **201.3 watts per square metre** - Bottom 17% of the PERC 400-450 W segment, against a median of 206.2. - **Best for:** Owners who value a long output guarantee. - **Not ideal for:** Weight-limited structures, tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 400 W - **Efficiency:** 20.10 % - **Voltage at Pmax (Vmp):** 31.01 V - **Current at Pmax (Imp):** 12.90 A - **Open-circuit voltage (Voc):** 36.78 V - **Short-circuit current (Isc):** 13.52 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.350 %/degC - **Temperature coefficient of Voc:** -0.280 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 108 - **Bifacial:** yes ### Physical - **Length:** 1734 mm - **Width:** 1146 mm - **Thickness:** 30 mm - **Weight:** 25.3 kg - **Area:** 1.99 m2 - **Power density:** 201.3 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 85.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.45 % - **Output after 30 years:** 340 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12187 of 14129 | | Power density | 12160 of 14129 | | Temperature coefficient | 10489 of 14129 | | Weight | 12974 of 14129 | | Warranty | 21 of 14129 | ## Pros - **Glass-Glass Construction with PID Protection** - The dual-glass design of the GCL-M10/54GDF-B series eliminates moisture ingress and EVA creep, reducing PID degradation to zero. IEC 61730 certification confirms that glass-glass modules deliver mechanical service life exceeding 30 years - a critical advantage for installations exposed to industrial or coastal environments. - **30-Year Linear Power Warranty** - The manufacturer provides a 30-year linear performance warranty, on par with peer comparables such as Phono Solar TWINPLUS and Solarspace SS8 in this segment. For residential prosumer and commercial installations alike, this is a compelling argument in full system-lifecycle LCOE calculations. - **BNEF Tier-1 Manufacturer - GCL-SI Since 1990** - GCL System Integration is listed on the Bloomberg NEF Tier-1 module manufacturers ranking, ensuring bankability for non-recourse project financing and a stable warranty support infrastructure. With operations dating back to 1990, GCL-SI provides a solid historical track record for assessing warranty continuity. - **Bifacial Technology - Additional Yield from Albedo** - Bifacial cell technology enables 5-25% additional energy harvest from ground-reflected irradiance (white gravel, light-colored membranes, snow). The series performs particularly well in flat-roof and ground-mounted systems where the underlying surface albedo can be optimized. - **High Power Density for the PERC M10 Segment** - An efficiency range of 20.1-21.1% in the 54-cell M10 format positions this series among the leading PERC modules on the European market. The M10 format is compatible with standard aluminum racking profiles, simplifying installation and reducing overall BoS costs. ## Cons - **Efficiency Below Top Peer Comparables** - The maximum efficiency of 21.1% trails Solarspace SS8 (21.51%) and Vikram Solar PARADEA (21.51%) by 0.41 percentage points at the same peak power of 420 Wp. For a 10 kWp system, this translates to approximately 0.2 m² of additional roof area required to achieve the same peak output. - **Product Warranty Only 12 Years** - A 12-year product warranty falls short of the rising market standard - Jinko Solar Tiger Neo and LONGi Hi-MO 6 both offer 15-25-year product warranties. This may represent a risk factor for projects with long-term bank financing or leasing arrangements. - **P-Type PERC Technology - Higher Degradation Than N-Type** - PERC (P-type) cells exhibit a higher annual degradation rate (~0.45-0.55%) compared to N-type TOPCon (~0.30-0.40%), resulting in meaningfully lower energy yields over a 30-year system lifetime. Competing products in a similar price bracket are increasingly offering N-type cells as standard. ## About this series The GCL-M10/54GDF-B series consists of advanced **bifacial double glass** modules that redefine performance standards in modern residential and commercial installations. Thanks to the use of innovative **N-type TopCon** cells, these panels offer significantly lower annual degradation and an excellent temperature coefficient, which translates into real-world higher energy yields even on the hottest days of the year. The robust glass-glass construction effectively eliminates the problem of moisture penetration and protects against chemical corrosion, which, combined with the complete absence of the PID phenomenon, drastically extends the lifespan of the entire system. This is an ideal solution for investors looking for **maximum mechanical durability** and high aesthetics, as the modules' black frame blends perfectly with modern building architecture. Active use of bifacial technology allows for additional free energy harvesting from radiation reflected off the ground, making this series unrivaled in flat roof and ground-mount installations. By choosing GCL-M10/54GDF-B, you gain **energy security** based on multi-busbar cell architecture, which effectively minimizes power losses caused by potential micro-cracks. This series stands out from the competition with an optimal balance between compact size and powerful performance, offering the **highest power density** while maintaining exceptional ease of installation on standard profiles. ## Notable figures - At 20.1% efficiency, this panel is on par with typical \*\*PERC 400-450W\*\* modules - 201.3 W/m² power density is 4.9 W/m² below \*\*PERC 400-450W\*\* median (206.2 W/m²) - requires larger installation area - Temperature coefficient of -0.35%/°C matches the \*\*PERC 400-450W\*\* median - At 25.3 kg (3.3 kg above \*\*PERC 400-450W\*\* median of 22.0 kg), requires checking roof load capacity - #12187 for efficiency, #10489 for temperature performance out of 14129 panels ## Questions ### What warranty coverage applies to the GCL-M10/54GDF-B panels and what does it include? The GCL-M10/54GDF-B series carries a 12-year product warranty covering physical defects and material faults, along with an industry-leading 30-year linear power output warranty. This means that after three decades of operation, the modules are warranted to still produce at least the percentage of their nominal 420 Wp output specified in the datasheet. The robust glass-glass construction significantly reduces long-term degradation and is the primary reason GCL is able to offer such an extended power warranty. ### Is it worthwhile to install GCL-M10/54GDF-B panels on a flat roof or ground-mounted system? Yes, the bifacial design of the GCL-M10/54GDF-B series makes flat-roof and ground-mounted installations particularly advantageous. The rear glass surface can harvest up to 25% additional energy from irradiance reflected off the ground surface - for example, from a light-colored membrane, gravel, or grass. Maintaining adequate clearance between the module and the mounting surface is critical to allow diffuse and reflected light to reach the rear side of the module. ### How do the PERC cells in the GCL-M10/54GDF-B perform on extremely hot days? PERC cells have a typical temperature coefficient of approximately -0.38%/°C, meaning the module loses just over one-third of a percent of its rated power for every degree Celsius above 25°C. However, the glass-glass (double glass) construction and hermetically sealed design help maintain a lower nominal operating cell temperature (NOCT) compared to modules with a polymer backsheet, which partially offsets this effect under real-world operating conditions. ### What is the annual degradation rate of the GCL-M10/54GDF-B panels, and what does this mean for my system? For PERC technology, the typical annual degradation rate is approximately 0.55%. At a nominal power of 420 Wp, this translates to a loss of roughly 2.3 Wp per year. The double glass construction without a polymer backsheet acts as an effective moisture barrier, addressing the primary cause of accelerated degradation in harsh environmental conditions. Combined with the elimination of potential-induced degradation (PID), this series delivers predictable and stable energy production throughout the entire warranty period. ### Is GCL a reliable manufacturer, and do its panels hold the certifications required in Poland? Yes, GCL System Integration (GCLSI) appears on the Bloomberg NEF Tier 1 list, which confirms its financial bankability and manufacturing scale. It is part of GCL Group, one of the world's largest producers of polysilicon and PV modules. The GCL-M10/54GDF-B series holds IEC 61215 and IEC 61730 certifications, which are required by Polish installers and are necessary to qualify for funding under national subsidy programs. ### Are the GCL-M10/54GDF-B panels compatible with standard racking systems and popular inverters? Yes, GCL-M10/54GDF-B modules are compatible with standard aluminum racking profiles (e.g., Schletter, K2, Esdec) used by the majority of installers. The electrical parameters at 420 Wp fall within the accepted input ranges of popular string inverters from brands such as Fronius, SMA, Huawei, and SolarEdge. Before purchasing, it is advisable to confirm the exact module dimensions with your installer in order to select the correct mid-clamps and end-clamps appropriate for a frameless glass-glass construction. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/EN-1054GDF-B-cac418d22dcf.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Luxor Solar LX-440M/182-108+GG](https://comparepv.com/panel/luxor-solar-lx-440m-182-108-gg) | 440 W | +40 W, cooler, +3.0 pp | | [Just Solar JST-EDMH-(445-465)W-TD (450W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-450w-class) | 450 W | +50 W, cooler, +2.9 pp | | [Q-SUN Solar QNN182-HG450-54](https://comparepv.com/panel/qn-solar-pv-limited-qnn182-hg450-54) | 450 W | +50 W, cooler, +2.9 pp | | [Huayao HY440-N108BDD](https://comparepv.com/panel/huayao-hy440-n108bdd) | 450 W | +50 W, cooler, +2.9 pp | | [BYD NLBK-27-450](https://comparepv.com/panel/byd-nlbk-27-450) | 450 W | +50 W, cooler, +2.9 pp | | [Renesola RS41-450NBG-E3](https://comparepv.com/panel/renesola-rs41-450nbg-e3) | 450 W | +50 W, cooler, +2.9 pp | | [GCL GCL-M10/54GDF-B 405W](https://comparepv.com/panel/gcl-gcl-m10-54gdf-b-405w) | 405 W | +0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +110 W, cooler, +4.9 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +95 W, cooler, +4.7 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +105 W, cooler, +4.6 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | +105 W, cooler, +4.6 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +90 W, cooler, +4.4 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +100 W, cooler, +4.4 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +100 W, cooler, +4.4 pp | --- Source: https://comparepv.com/panel/gcl-gcl-m10-54gdf-400 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.