Strong in heat, heavy for its output
The DualSun FLASH Half-Cut Glass-Glass TOPCon series is a range of advanced photovoltaic panels designed for maximum durability and high performance in varying weather conditions. The key to exceptional performance lies in the use of N-type TOPCon cells in a Half-Cut technology, which minimize energy losses within the module and significantly improve performance in low-light conditions. The glass-glass construction eliminates the traditional backsheet, providing excellent resistance to moisture, UV radiation, and mechanical damage - load tests exceed standard norms by 2-3 times, and the panels are certified to withstand hail. Thanks to bifaciality, the modules also generate energy from reflected light from the ground, which realistically increases the overall output of the installation without additional costs. The manufacturer offers one of the longest warranties in the industry - 30 years on the product and performance, which confirms the security of a long-term investment. The series also stands out for its low carbon footprint - the low-carbon certification and even 17% less CO2 emissions compared to standard panels make it a choice for environmentally conscious investors. This is the ideal solution for demanding residential and commercial rooftop installations, where aesthetics, durability, and sustainable energy production are key.
Ranking
Signals from the data
Residential, commercial and shaded-installations.
Weight-limited structures, tight roof space and roofs where every square metre has to count.
Top 11% of the TOPCon 450-500 W segment, against a median of -0.290.
Bottom 6% of the TOPCon 450-500 W segment, against a median of 52.2. Ranked 11,050th in the whole database.
Bottom 18% of the TOPCon 450-500 W segment, against a median of 22.52%.
Bottom 21% of the TOPCon 450-500 W segment, against a median of 225.2.
DualSun guarantees a minimum of 87.4% power output after 30 years of operation, exceeding the industry standard offered by comparable manufacturers (JA Solar, Trina Solar — typically 25 years / 84.8%). The warranty covers both product defects and linear power degradation, providing genuine investment protection across three decades.
The 2 mm front glass plus rear glass configuration eliminates the backsheet, which is prone to delamination and moisture ingress. The module has passed mechanical load tests of 5,400 Pa (positive pressure) and 2,400 Pa (negative pressure) — values 2–3× higher than the IEC 61215 minimum. Certified hail resistance (IEC 61215:2016, 25 mm ball, 23 m/s, 10 impact points) is particularly relevant under Polish storm conditions.
Dual-sided energy harvesting delivers a manufacturer-stated annual yield increase of +10% under favorable conditions (high-albedo surface, appropriate tilt angle). Combined with N-type TOPCon technology — which offers a low temperature coefficient and superior performance under diffuse irradiance — the module consistently produces more energy than its nominal 450 Wp rating suggests.
The DualSun FLASH holds both the ECS PPE2 certification and an Environmental Product Declaration (EPD), documenting a carbon footprint approximately 17% lower than that of standard mono PERC modules. For commercial installations and prosumers applying for green incentive programs (e.g., Mój Prąd with environmental eligibility criteria), this can provide a tangible formal advantage.
DualSun earned the Top Brand PV label in both 2021 and 2022 and holds a 20% share of the residential PV installation market in France. As a European manufacturer with a documented track record of over 100,000 installations across 25+ countries since 2013, the company conducts design and specification audits through its engineering team in Marseille, with production carried out at certified facilities.
At the same rated power of 450 Wp, comparable modules achieve higher module efficiency: SunKean/Sunket SKT450 at 23.04%, Suntech Ultra V Pro at 22.5%, versus the DualSun FLASH at 22.0%. On roof areas where space is constrained, this means the panel requires more surface area per kWp than its direct alternatives.
The glass-glass design results in a module weight of approximately 24.5 kg, roughly 15–20% heavier than typical backsheet modules (approximately 20–21 kg). On older roofs or for larger installations (>20 modules), a structural engineering assessment of the roof deck or rafter system may be required, adding to project costs.
- Efficiency of 22.0% is 0.5pp below the TOPCon 450-500W median (22.5%)
- At 220.5 W/m², this panel generates 4.7 W/m² less per unit area than TOPCon 450-500W median (225.2 W/m²)
- Temperature coefficient of -0.28%/°C matches the TOPCon 450-500W median
- At 25.7 kg, this panel is 1.7 kg heavier than the TOPCon 450-500W median (24.0 kg) - more demanding for installation crews
- Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface
Specifications
Datasheet charts
Measured curves published by DualSun in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 450 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 197 panels of the same or similar size to this one, within ±10 mm. See them here Found 201 panels of the same or similar size to this one, within ±25 mm. See them here Found 1712 panels of the same or similar size to this one, within ±50 mm. See them here Found 4014 panels of the same or similar size to this one, within ±100 mm. See them here