Warranty pick, no clear weak spot
The GCL GCL-M10/72GDF series are bifacial modules featuring a dual-glass construction, designed for reliable operation in challenging field conditions. Based on a monocrystalline P-type cell architecture using PERC technology and equipped with MBB, the module effectively minimizes connection losses and performs better under non-ideal irradiation conditions, such as light dirt or diffuse light. In turn, half-cut cells reduce working currents in module sections, resulting in lower internal losses and more predictable string performance.
The dual-glass structure with POE encapsulant aids long-term resistance to degradation and supports higher mechanical durability, which is crucial for installations exposed to wind, snow, and frequent temperature changes. This makes it an excellent choice for floating PV, agroPV, and ground-mount installations, where fire safety class A, reliability, and additional energy yield from the rear side of the module are essential.
Ranking
Signals from the data
Utility-scale, agrivoltaic, floating and shaded-installations.
Top 25% of the PERC 550-600 W segment, against a median of 27 yrs.
The dual-glass construction using POE instead of EVA significantly reduces the risk of yellowing and delamination over the long term. Rear-side energy yield typically adds +5-15% depending on ground albedo, making this series particularly attractive for utility-scale ground-mount, agrivoltaic, and floating PV installations. Certified Fire Safety Class A.
The multi-busbar (MBB) architecture shortens current paths and reduces resistive losses at cell interconnections. Half-cut cells lower the operating current per section by approximately 50%, reducing thermal stress and improving partial-shading tolerance - a meaningful advantage under non-ideal irradiance conditions.
A maximum module efficiency of 21.68% positions this series virtually on par with direct peer comparables: DAH Solar DHM-T72X10/BF/FS (21.72%) and Exiom EX540-560M(B)-144 (21.7%). The gap of less than 0.05 percentage points is not operationally significant, and GCL delivers comparable energy yield at equivalent technology.
The manufacturer provides a 30-year linear performance warranty, exceeding the 25-year standard offered by most Chinese P-type PERC producers. This translates into lower financial risk in bankability assessments and a longer investment return horizon for utility-scale PV projects.
GCL-SI is listed as a Tier-1 manufacturer by Bloomberg NEF, qualifying the modules as bankable and enabling non-recourse debt project financing. Over 30 years of industry presence and substantial production capacity minimize counterparty risk under long-term service and supply agreements.
By 2025-2026, N-type TOPCon cells have reached price parity with PERC while offering lower LID (approximately 0.5% vs. ~1.5-2% for P-type in year one) and a better temperature coefficient (approximately -0.30%/°C vs. -0.35%/°C for PERC). In long-term utility-scale projects, the difference in real annual energy yield can reach 1-2%, to this series' disadvantage.
The product warranty stands at 12 years - in line with most Chinese Tier-1 modules in this segment, but below the 15-year coverage offered by select premium manufacturers (e.g., certain LONGi Hi-MO X6 and REC Alpha series). For installers serving demanding corporate clients, this may be a negotiating point.
- Efficiency of 21.3% matches the PERC 550-600W median
- At 212.9 W/m² power density, roof space requirements are typical for PERC 550-600W panels
- Temperature coefficient of -0.35%/°C matches the PERC 550-600W median
- Bifaciality factor of 70% can add 4-10% extra yield with reflective mounting surface
- Ranked #8776 out of 14129 panels for efficiency in the database
Specifications
Datasheet charts
Measured curves published by GCL in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 550 Wp appear here. The rest cover the whole series.
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.
Found 2327 panels of the same or similar size to this one, within ±10 mm. See them here Found 2369 panels of the same or similar size to this one, within ±25 mm. See them here Found 2383 panels of the same or similar size to this one, within ±50 mm. See them here Found 2548 panels of the same or similar size to this one, within ±100 mm. See them here
About the GCL-M10/72GDF series
These answers cover the whole series. Where a figure differs, the specification above is this module's own.