Light for its output, weak in heat
GCL-M10/72H-B series panels are the answer to the needs of investors seeking maximum power density while maintaining high mechanical durability. The use of M10 type cells in half-cut technology allows for a significant reduction in resistive losses, which translates into stable operation even in less favorable lighting conditions. The innovation of this series is primarily manifested in the use of bifacial technology, which enables energy generation from both sides of the module. Thanks to this, the installation gains additional power yield from reflected radiation, which is crucial on surfaces with a high albedo coefficient, such as white roof membranes or light gravel. The multi-busbar system effectively shortens the electron flow path, limiting the risk of micro-cracks and increasing the overall long-term reliability of the system. This series is primarily dedicated to large-scale photovoltaic farms and large industrial facilities, where optimizing installation costs is of key importance. By choosing GCL-M10/72H-B, the investor receives a product with increased resistance to PID degradation, which sets it apart from standard market solutions. This is a solution for professionals who do not seek compromises between efficiency and resistance to harsh weather conditions, ensuring a quick return on investment thanks to higher total efficiency.
Ranking
Signals from the data
Utility-scale, commercial and shaded-installations.
Hot climates and owners who want a long output guarantee.
Top 17% of the PERC 550-600 W segment, against a median of 52.7.
Bottom 5% of the PERC 550-600 W segment, against a median of -0.350. Ranked 12,425th in the whole database.
Bottom 24% of the PERC 550-600 W segment, against a median of 27 yrs.
GCL System Integration Technology has maintained an uninterrupted presence on the BNEF Tier-1 list for many years and ranks among the three largest PV module manufacturers in the world. This status simplifies access to non-recourse project finance for utility-scale PV plants, directly reducing the cost of capital for investors.
The M10 format (182 mm) in a half-cut configuration reduces the operating current of each half-cell by half, lowering resistive (I²R) losses and improving tolerance to partial shading. Multi-busbar technology shortens the electron current path and reduces the risk of micro-cracks, enhancing long-term reliability.
The 540-560 Wp power range allows a reduction in the number of modules per installation and lower BoS costs (cabling, racking, and labor). For a 1 MWp solar farm, this translates to approximately 1,786 modules versus ~2,000 for a typical 500 Wp module - a tangible cost benefit at scale.
GCL uses a specialized encapsulant material and rigorous process controls to ensure high resistance to Potential Induced Degradation (PID). This is a critical attribute for systems operating at DC voltages up to 1,000 V, which are particularly susceptible to PID in humid climates.
The manufacturer has been active in the market since 1990 and is vertically integrated across polysilicon, wafer, cell, and module production. Its long track record and production scale minimize the risk of module availability issues and warranty claim fulfillment problems over a 25-year project horizon.
The series reaches a maximum efficiency of 21.3%, while all three comparable competitors achieve 21.67-21.72% (Exiom 21.7%, Premier Energies 21.67%, DAH Solar 21.72%). The ~0.4 percentage-point gap translates to approximately 1-2% lower annual energy yield for the same roof or ground area.
In 2025/2026, the market is shifting decisively toward N-type TOPCon. PERC cells exhibit annual degradation rates of 0.6-0.8% versus 0.4-0.5% for TOPCon, along with higher susceptibility to Light-Induced Degradation (LID). Over a 25-year horizon, this results in meaningfully lower cumulative energy yield compared to newer cell technologies.
The GCL-M10/72H-B series is monofacial (is_bifacial: false), whereas the directly comparable DAH Solar DHM-T72X10/BF/FS offers a bifacial design. The absence of rear-side generation precludes additional yield from reflected irradiance (typically +5-15% on high-albedo surfaces), which is a significant limitation particularly for ground-mounted utility-scale PV plants.
- At 21.3% efficiency, this panel is on par with typical PERC 550-600W modules
- At 213.4 W/m² power density, roof space requirements are typical for PERC 550-600W panels
- At -0.36%/°C, hot weather performance is typical for PERC 550-600W panels
- At 27.6 kg, this panel is 3.2 kg lighter than PERC 550-600W median (30.8 kg) - easier handling during installation
- In the top 61% for efficiency among all PERC panels
Specifications
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
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About the GCL-M10/72H-B series
These answers cover the whole series. Where a figure differs, the specification above is this module's own.