Efficiency leader, no clear weak spot
The GCL SIROT Efficient NT10/72GDF panel series is based on advanced N-type cells made with TOPCon technology, which represents a significant step forward in the efficiency of photovoltaic systems. The bifacial dual glass design allows for the effective use of light reflected from the ground, which, combined with higher conversion efficiency, translates into a much higher energy yield from a given area compared to standard modules. Thanks to the use of reinforced glass on both sides, these panels exhibit extreme resistance to weather conditions and minimal light- and temperature-induced degradation, guaranteeing stable power for long decades. This solution is dedicated primarily to large solar farms and demanding industrial installations, where the key is to maximize the reduction of the LCOE ratio. What sets the NT10/72GDF series apart from the competition is its exceptionally low temperature coefficient of power, allowing it to maintain high performance parameters even on hot days. By choosing these modules, investors receive a product with exceptional mechanical durability that effectively eliminates the problem of micro-cracks and premature component wear in harsh environmental conditions. This innovative series combines the safety of the double-glazed design with state-of-the-art cell architecture, offering one of the highest power densities currently available on the global market.
Ranking
Signals from the data
Utility-scale, commercial and hot-climate.
Top 11% of the TOPCon 600-650 W segment, against a median of 22.80%.
Top 11% of the TOPCon 600-650 W segment, against a median of 227.7.
The module's peak efficiency of 23.42% outperforms direct competitors by nearly 2 percentage points: JS Solar JS210MHC120, LEDVANCE M585~605P60UB-SF-F3, and Hiwatt HW-M12/120H achieve only 21.37-21.4%. This represents a relative advantage of approximately 9.5%, translating into significantly higher energy yield from the same rooftop or ground-mount area.
The power temperature coefficient of -0.29%/°C (ENF Solar data, 580-605 W datasheet) is notably better than that of typical PERC modules (-0.35%/°C). In a Polish climate, where cell temperatures peak at approximately 70°C, this difference delivers a real-world yield improvement of roughly 1.8-2.5 percentage points during summer compared to older technology.
N-type TOPCon cells exhibit negligible light-induced degradation (LID <0.5%) and eliminate the LeTID effect known from PERC modules. The bifacial construction, with a confirmed bifaciality factor of ~80%, enables an additional 10-20% energy gain from ground-reflected irradiance in ground-mount installations with a high-albedo surface.
GCL guarantees a minimum of 87.4% of nominal power output after 30 years of operation, directly reducing the LCOE for utility-scale solar farms and commercial installations. Competitors in the same price tier (e.g., Jinko Tiger Neo) offer an equivalent warranty structure - 12-year product warranty plus 30-year linear power warranty - confirming this as the market benchmark for the premium segment.
GCL System Integration Technology has appeared on the Bloomberg NEF Tier 1 list for multiple consecutive quarters and ranks 2nd worldwide in PV module manufacturing capacity. Tier 1 status is required by most institutions financing solar projects under non-recourse structures, which streamlines bankability for utility-scale projects built around this series.
The dual-glass construction (2 mm glass on both sides) results in a module weight of 31.1 kg (dimensions 2278×1134×30 mm), approximately 25-40% heavier than typical glass-backsheet modules in this power class (~22-25 kg). This may be a limiting factor for retrofits on older rooftops with low load-bearing capacity, and it increases the cost and logistical complexity of installation on commercial and industrial buildings.
- At 23.4% efficiency, this panel is 0.6pp above typical TOPCon 600-650W modules (median: 22.8%)
- Power density of 234.2 W/m² packs 6.5 W/m² more into the same footprint vs TOPCon 600-650W median (227.7 W/m²)
- Temperature coefficient of -0.29%/°C matches the TOPCon 600-650W median
- Weight of 31.1 kg (1.7 kg below TOPCon 600-650W median of 32.8 kg) allows easier transport and roof mounting
- Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface
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 605 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 SIROT Efficient NT10/72GDF series
These answers cover the whole series. Where a figure differs, the specification above is this module's own.