--- title: "GCL GCL-M10/54BH-390 Solar Panel: Specs & Datasheet | ComparePV" description: "GCL GCL-M10/54BH-390 solar panel. Specs: 20.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/gcl-gcl-m10-54bh-390" image: "https://comparepv.com/og/panel/gcl-gcl-m10-54bh-390.png" updated: 2026-09-11 --- # GCL GCL-M10/54BH-390 Light for its output, weak in heat 112 panels in the segment TOPCon 350-400 W ## Identity - **Manufacturer:** GCL - **Model:** GCL-M10/54BH-390 - **Series:** GCL-M10/54BH - **Rated power:** 390 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 350-400 W (112 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 390 W | 380 W | Strong - top 24% | | | Module efficiency | 20.00% | 18.20% | Strong - top 18% | 12,298 | | Power density | 199.7 | 181.8 | Strong - top 18% | 12,339 | | Temperature coefficient | -0.360 | -0.290 | Weak - bottom 4% | 12,425 | | Weight (kg) | 20.5 kg | 26.0 kg | Strong - top 7% | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 20% | 9,912 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.00% | 18.20% | Strong - top 18% | 12,298 | | Power density | 199.7 | 181.8 | Strong - top 18% | 12,339 | | Temperature coefficient | -0.360 | -0.290 | Weak - bottom 4% | 12,425 | | Weight per kWp | 52.6 | 68.9 | Strong - top 7% | 6,239 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 20% | 9,912 | ### Strengths - **52.6 kg per kWp** - Top 7% of the TOPCon 350-400 W segment, against a median of 68.9. Ranked 6,239th in the whole database. - **199.7 watts per square metre** - Top 18% of the TOPCon 350-400 W segment, against a median of 181.8. - **20.00% module efficiency** - Top 18% of the TOPCon 350-400 W segment, against a median of 18.20%. ### Watch out for - **-0.360 %/°C temperature coefficient** - Bottom 4% of the TOPCon 350-400 W segment, against a median of -0.290. Ranked 12,425th in the whole database. - **25 year performance warranty** - Bottom 20% of the TOPCon 350-400 W segment, against a median of 30 yrs. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Hot climates and owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 390 W - **Efficiency:** 20.00 % - **Voltage at Pmax (Vmp):** 30.71 V - **Current at Pmax (Imp):** 12.70 A - **Open-circuit voltage (Voc):** 36.48 V - **Short-circuit current (Isc):** 13.33 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:** TOPCon - **Cell count:** 108 ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 20.5 kg - **Area:** 1.95 m2 - **Power density:** 199.7 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:** 320 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12298 of 14129 | | Power density | 12339 of 14129 | | Temperature coefficient | 12425 of 14129 | | Weight | 6239 of 14129 | | Warranty | 9912 of 14129 | ## Pros - **BNEF Tier 1 Manufacturer - Bankable for Years** - GCL System Integration (GCL-SI) has maintained a continuous presence on Bloomberg New Energy Finance's bankable Tier 1 list, confirming its ability to support non-recourse project finance through independent lenders. Active in the industry since 1990, the company ranks among the world's largest PV module suppliers. Bankable status is critical for commercial and residential prosumer installations requiring third-party financing. - **Peak Efficiency of 21.5% Matches Segment Leaders** - The top variant of the series achieves 21.5%, directly matching the Solarspace SS8-54HSB (21.51%) and Vikram Solar PARADEA (21.51%) - the highest-efficiency models among peer comparables. Phono Solar TWINPLUS reaches only 20.98%, more than 0.5 percentage points lower. - **Half-Cut PERC Architecture Reduces Shading Losses** - Splitting cells in half lowers I²R resistive losses and limits the impact of partial shading from chimneys, dormers, and antennas on overall module output. Under typical rooftop conditions for prosumer installations, the half-cut architecture delivers measurably higher daily energy yield compared to full-cell PERC modules of equivalent power class. - **16 Power Variants (385-420 Wp)** - A 35 Wp span across 16 configurations gives system designers the flexibility to precisely match module count to available roof area and target system capacity - without resorting to a different series or manufacturer. - **Full-Black Aesthetics for Premium Construction** - A uniform black frame, backsheet, and cells create a visually cohesive surface - a compelling differentiator for installations on modern roofs with dark tiles or in architectural projects where standard silver frames are rejected by the developer or a heritage preservation authority. ## Cons - **P-Type PERC Being Displaced by N-Type TOPCon** - The market is shifting en masse toward TOPCon and HJT: the CAGR forecast for PERC stands at -10.8% over 2025-2030. P-type PERC cells degrade at approximately 0.6-0.8%/year versus ~0.4-0.5%/year for TOPCon, which translates into meaningfully lower cumulative energy yield over a 25-year power warranty horizon. The GCL-M10/54BH series does not offer the N-type technology advantages already available in lower-cost competing models. - **12-Year Product Warranty - Below the Emerging Standard** - LONGi, JA Solar, and Jinko Solar have extended their standard product warranties to 15 years. The GCL-M10/54BH's 12-year warranty is now 3 years shorter than the rising Tier 1 benchmark, which may be a factor in commercial tender evaluations or bank financing scenarios with longer investment horizons. - **No Bifacial Gain** - The series is strictly monofacial (is\_bifacial: false). Installations on high-albedo surfaces - white TPO membrane, light gravel, or snow - can capture an additional 5-15% energy yield with bifacial modules, an option unavailable in this series despite GCL offering bifacial lines in other product families. ## About this series GCL GCL-M10/54BH series was designed with installations in mind where aesthetics, reliable performance, and predictable energy yield over years are crucial. These are full-black modules, seamlessly integrating with modern roofs and facades - without compromising on user parameters. The application of monocrystalline PERC technology and half-cut architecture helps minimize losses in real operating conditions and improves panel performance under partial shading (e.g., from chimneys, trees, or window frames). The series uses the M10 format, achieving a practical balance between module power and ease of installation on standard roof structures. The construction and protections are engineered for durability in demanding climates - essential for unattended operation. These modules are suitable for domestic consumer installations, commercial rooftop systems, and projects where visual values and long-term reliability are important. ## Notable figures - Efficiency of 20.0% is 4.0pp above the \*\*TOPCon 0-400W\*\* median (16.0%) - 199.7 W/m² power density - 39.9 W/m² more than \*\*TOPCon 0-400W\*\* median (159.8 W/m²), more power per roof area - At -0.36%/°C, loses 0.07pp more power per degree than \*\*TOPCon 0-400W\*\* median (-0.29%/°C) - 20.5 kg weight - 3.0 kg lighter than \*\*TOPCon 0-400W\*\* median (23.5 kg), reducing installation effort - In the top 87% for efficiency among all TOPCon panels ## Questions ### What warranty is provided for the GCL-M10/54BH panels? The GCL-M10/54BH series comes with a 12-year product warranty covering material and workmanship defects, along with a 25-year linear power output warranty. These are the standard warranty terms offered by leading Tier 1 manufacturers - GCL belongs to this group, meaning its warranty commitments are backed by the company's solid financial standing in the market. ### Do GCL-M10/54BH full black panels lose efficiency compared to standard modules? The full black version (black frame, black backsheet) results in a slightly higher module operating temperature on hot days, which can reduce instantaneous efficiency by 1-2%. In practice, with a well-ventilated installation on a pitched roof, the difference is negligible, and the aesthetic appearance combined with a rated power of up to 420 Wp makes these panels an attractive choice for modern buildings. ### What real-world benefits does PERC and half-cut technology provide in the GCL-M10/54BH series? PERC technology increases cell efficiency by improving light absorption at the rear of the cell. The half-cut architecture divides each cell into two halves, which reduces resistive losses and improves module performance under partial shading conditions - for example, from a chimney, antenna, or tree. As a result, the module generates more energy throughout the day than a conventional panel with the same nominal power rating. ### Is the GCL-M10/54BH series suitable for a typical pitched roof in Poland? Yes. The M10 format (182 mm cells) in a 54-cell half-cut configuration results in a compact module that fits standard rooftop mounting structures used in Polish prosumer installations. The monofacial design (without a transparent rear glass) keeps weight low, which simplifies installation for crews working on pitched roofs covered with roof tiles or metal roofing. ### Is GCL a proven solar panel manufacturer? GCL (GCL System Integration Technology) is classified as a Tier 1 manufacturer according to BNEF rankings, reflecting an established market position, in-house production lines, and bankability - meaning the ability to secure project financing from financial institutions. The company is part of the Chinese GCL Group conglomerate, one of the world's largest suppliers of solar-grade silicon, which translates into supply chain stability and continuity of warranty support. ### Do the GCL-M10/54BH 420 Wp panels operate efficiently in winter and under overcast conditions? Yes. Monocrystalline PERC cells feature a low temperature coefficient, which means that on cold, sunny winter days the module can operate at efficiency levels close to STC - or even slightly above summer performance. Under diffuse light conditions, PERC technology performs better than older polycrystalline cells, although effective energy production depends primarily on the incident solar irradiance. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/4651642046892b51e24fc8-2ebf30d111ae.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 | +50 W, cooler, +3.1 pp | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | -50 W, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M360W](https://comparepv.com/panel/gamko-new-energy-gka210m360w) | 360 W | Lighter, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M380W (1/4\*4\*38)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-4-4-38) | 380 W | Lighter, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M400W (1/2\*4\*20)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-2-4-20) | 400 W | Lighter, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M400W (1/4\*4\*40)](https://comparepv.com/panel/gamko-new-energy-gka210m400w-1-4-4-40) | 400 W | Lighter, +3.0 pp, +5 yr warranty | | [Gamko New Energy GKA210M380W (1/2\*4\*19)](https://comparepv.com/panel/gamko-new-energy-gka210m380w-1-2-4-19) | 380 W | Lighter, +3.0 pp, +5 yr warranty | | [Jetion JT440SYK(B)](https://comparepv.com/panel/jetion-jt440syk-b) | 440 W | +50 W, cooler, +2.9 pp | | [GCL GCL-M10/54BH-385W](https://comparepv.com/panel/gcl-gcl-saturn-gcl-m10-54bh-385w) | 385 W | -0.3 pp | | [GCL GCL-M10/54BH-395W](https://comparepv.com/panel/gcl-gcl-saturn-gcl-m10-54bh-395w) | 395 W | Very close match | | [GCL GCL-M10/54BH-400W](https://comparepv.com/panel/gcl-gcl-saturn-gcl-m10-54bh-400w) | 400 W | +10 W, +0.5 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +120 W, cooler, +5.0 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +105 W, cooler, +4.8 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +115 W, cooler, +4.7 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | +115 W, cooler, +4.7 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +100 W, cooler, +4.5 pp | --- Source: https://comparepv.com/panel/gcl-gcl-m10-54bh-390 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.