--- title: "GCL GCL-M10/54H-B 400 Solar Panel: Specs & Datasheet | ComparePV" description: "GCL GCL-M10/54H-B 400 solar panel. Specs: 20.10% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/gcl-gcl-m10-54h-b-400" image: "https://comparepv.com/og/panel/gcl-gcl-m10-54h-b-400.png" updated: 2026-09-11 --- # GCL GCL-M10/54H-B 400 Middle of its segment, weak in heat 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** GCL - **Model:** GCL-M10/54H-B 400 - **Series:** GCL-M10/54H-B - **Rated power:** 400 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) | 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 | -0.360 | -0.350 | Weak - bottom 15% | 12,425 | | Weight (kg) | 21.0 kg | 22.0 kg | Typical | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,912 | ### 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 | -0.360 | -0.350 | Weak - bottom 15% | 12,425 | | Weight per kWp | 52.5 | 53.0 | Typical | 6,090 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,912 | ### Watch out for - **-0.360 %/°C temperature coefficient** - Bottom 15% of the PERC 400-450 W segment, against a median of -0.350. - **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:** Residential and shaded-installations. - **Not ideal for:** Hot climates, 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:** -0.360 %/degC - **Temperature coefficient of Voc:** -0.280 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 108 ### Physical - **Length:** 1734 mm - **Width:** 1146 mm - **Thickness:** 30 mm - **Weight:** 21.0 kg - **Area:** 1.99 m2 - **Power density:** 201.3 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.55 % - **Output after 30 years:** 328 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12187 of 14129 | | Power density | 12160 of 14129 | | Temperature coefficient | 12425 of 14129 | | Weight | 6090 of 14129 | | Warranty | 9912 of 14129 | ## Pros - **BNEF Tier 1 Manufacturer with 35-Year Track Record** - GCL-SI (est. 1990) has maintained a continuous presence on the Bloomberg New Energy Finance Tier 1 list, conferring full project bankability and enabling financing through independent commercial lenders. This is a significant advantage when applying for prosumer loans and subsidy programs. - **Half-Cut MBB M10 - 108 Half-Cut Cells** - The half-cut cell architecture with multi-busbar (MBB) interconnection reduces resistive losses and mitigates the impact of partial shading - particularly relevant for residential rooftops with chimneys or antennas. The series delivers up to 420 Wp at efficiencies of up to 21.1%. - **Temperature Coefficient of -0.35%/°C** - A Pmax temperature coefficient of -0.35%/°C places this series among the better-performing PERC modules in the prosumer segment (typical PERC range: -0.35 to -0.38%/°C). This translates into meaningfully higher energy yield during summer months, when cell temperatures routinely exceed 70°C. - **25-Year Linear Power Warranty (≥84.8%)** - The manufacturer guarantees at least 84.8% of nominal power output after 25 years of operation, aligning with the Tier 1 market standard for PERC modules and ensuring predictable energy yield throughout the full financing period of the installation. ## Cons - **Discontinued Product Series** - The GCL-M10/54H-B was introduced in 2021 and has since been discontinued. This results in limited availability of new modules for potential system expansions, no active technical support for this product line, and a risk of difficulty sourcing matching replacement panels in the event of damage. - **Efficiency Below Best-in-Class Alternatives** - The series tops out at 21.1% efficiency, while comparable models - the Solarspace SS8-54HSB and Vikram Solar PARADEA - achieve 21.51%. A 0.41 percentage point difference on a typical 10 kWp system (approximately 24 panels, ~40 m²) results in measurably lower peak power output for the same roof area. - **12-Year Product Warranty** - The product warranty stands at 12 years, whereas a growing number of Tier 1 competitors - including those in the TOPCon segment - now offer 15 years as standard. For installations with a loan repayment period of 10-15 years, this is a borderline value that may affect risk assessment by financing institutions. ## About this series The GCL-M10/54H-B series features advanced photovoltaic modules based on **M10 type cells**, which represent a precise response to the growing needs of modern prosumer installations in Poland. The use of **Half-cut technology** combined with an optimal architecture of 108 half-cells significantly reduces energy losses resulting from electrical resistance and improves the overall system efficiency under partial shading conditions. This design was developed to maximize yields from limited roof space, making it an unrivaled choice for single-family homeowners seeking high power density. These modules are characterized by exceptional durability and resistance to aging processes, providing users with **PID parameter stability** for decades of trouble-free operation. Thanks to the use of MBB multi-busbar connections, the flow of charges is smoother, and the risk of dangerous micro-cracks is minimized. This series effectively combines aesthetics with top performance, offering a modern design while maintaining excellent yields even on heavily cloudy days. Compared to competing solutions, GCL-M10/54H-B offers a **better temperature coefficient**, which translates into higher energy production during summer heat. It is a solid and proven foundation for a safe micro-installation, integrating global materials engineering with high resistance to extreme snow loads and gusty winds. ## Notable figures - Efficiency of 20.1% matches the \*\*PERC 400-450W\*\* median - Power density of 201.3 W/m² is 4.9 W/m² below \*\*PERC 400-450W\*\* median (206.2 W/m²) - needs more roof space - 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 - #12187 for efficiency, #12425 for temperature performance out of 14129 panels ## Questions ### Is the GCL-M10/54H-B series still available for purchase? The GCL-M10/54H-B series has been discontinued by GCL and is no longer actively distributed by most suppliers. It may still be found sporadically as residual stock with certain importers, but availability is severely limited. If you require similar specifications and the same M10 half-cut technology, it is worth consulting your distributor about a current equivalent from GCL's lineup or another Tier 1 manufacturer. ### What warranty is provided on the GCL-M10/54H-B panels? The manufacturer offers a 12-year product warranty on GCL-M10/54H-B modules, covering material and manufacturing defects. In addition, a 25-year linear power output warranty applies, guaranteeing that the panel will not degrade below the performance thresholds specified in the datasheet throughout that period. These are standard warranty terms for a Tier 1 manufacturer with established bankability ratings. ### What is the temperature coefficient of the GCL-M10/54H-B panels, and what does it mean in summer conditions? The power temperature coefficient (Pmax) for the GCL-M10/54H-B series is approximately -0.35%/°C. This means that at a cell temperature of, for example, 65°C - typical during a Central European summer - the panel loses roughly 14% of its rated power relative to STC conditions (25°C). This result is better than that of older standard-cell modules, allowing the system to maintain respectable energy yields even during peak summer heat. ### Are the GCL-M10/54H-B 420W panels suitable for a small roof with partial shading? Yes, the half-cut cell technology (108 half-cut cells) used in the GCL-M10/54H-B series significantly reduces the impact of partial shading on the overall system. Because each half-cell operates independently, a shaded section of the roof does not prevent the remaining modules from producing power. With dimensions of 1722×1134 mm and an output of up to 420 W, the series also delivers high power density, making it easier to make effective use of limited roof space. ### Is GCL a reliable photovoltaic panel manufacturer? GCL System Integration (GCLSI) is classified as a Tier 1 manufacturer according to the Bloomberg NEF ranking, meaning it meets rigorous financial and manufacturing criteria. The company is one of the world's largest producers of PV cells and modules, holding ISO 9001, ISO 14001, and TÜV certifications. For financial institutions funding prosumer installations, Tier 1 status translates into lower investment risk and simplified access to loans or subsidies. ### Are the GCL-M10/54H-B panels monofacial or bifacial? The GCL-M10/54H-B series consists of monofacial modules - they do not feature bifacial functionality. This means energy is harvested exclusively from the front side, which is entirely sufficient for typical residential rooftop installations. Bifacial panels deliver meaningful gains primarily when installed over high-albedo surfaces in ground-mount configurations that provide adequate rear-side irradiance - conditions that a standard residential roof does not offer. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/EN-1054H-B-5de5637d864c.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 | Cooler, +3.0 pp, +5 yr warranty | | [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 | Heavier, +0.3 pp, +5 yr warranty | | [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-m10-54h-b-400 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.