Middle of its segment, modest efficiency
The DAS Solar DAON mini Bifacial Double Glass Module series is an advanced solution based on N-type TOPCon cell technology, setting new efficiency standards in the compact module segment. Thanks to its glass-glass construction, these panels feature extreme resistance to external factors and degradation, making them an ideal choice for the Polish climate. Bifacial module activity allows for the efficient use of reflected light, significantly increasing total energy production compared to monofacial counterparts. A key differentiator of the series is its optimized dimensions and low weight, which solves the problem of installation on roofs with limited load-bearing capacity or complex geometry. DAS Solar DAON mini also offers exceptional performance under low light conditions, resulting in longer system operating times throughout the day. Unlike standard products, this series has a very low annual degradation rate, guaranteeing financial security and a fast return on investment for investors. This product is designed for demanding residential users who do not want to choose between aesthetics and the ultimate durability of double glass technology, while maintaining maximum power density from the available space.
Ranking
Signals from the data
Residential and shaded-installations.
Tight roof space, weight-limited structures and roofs where every square metre has to count.
Bottom 17% of the TOPCon 400-450 W segment, against a median of 22.00%.
Bottom 18% of the TOPCon 400-450 W segment, against a median of 51.4.
Bottom 19% of the TOPCon 400-450 W segment, against a median of 220.2.
N-type TOPCon cells exhibit an annual degradation rate of ~0.4% (from year 2 onward), which is lower than the ~0.55% typical of the P-type PERC cells used in the comparable Hyundai DG G12 PERC Shingled. The manufacturer guarantees ≥87.4% power output after 30 years, and the series reaches an efficiency of 21.8%, marginally outperforming peer comparables (Hyundai 21.4%, Trina Vertex S 21.3%, Tongwei TERRA 5K 21.4%).
While Trina Solar Vertex S and Tongwei TERRA 5K standardly offer a 25-year power warranty (down to ~84.8%), DAS Solar DAON mini guarantees ≥87.4% output over 30 years. The additional 5-year warranty extension at a higher power threshold translates into a measurably higher cumulative energy yield over a long investment horizon.
The dual-glass design eliminates the risk of PID degradation and moisture ingress, extending module service life beyond the standard 25 years. Bifaciality delivers an additional yield gain of 5–15% from reflected irradiance (particularly advantageous in the Polish climate due to snow cover and light-colored surfaces), representing a clear advantage over monofacial equivalents in this power class.
Built on 108 half-cut cells (vs. 144 in standard large-format modules), the series offers lower weight and reduced dimensions, directly addressing the challenge of mounting on roofs with limited load-bearing capacity or irregular geometry. This is a tangible advantage over the larger utility-class modules used by some competing manufacturers.
DAS Solar has appeared on the BloombergNEF Tier-1 bankable manufacturers list for several consecutive quarters (confirmed Q1 2026), ranking as the 9th largest global module supplier in 2024 and the 2nd largest TOPCon manufacturer in the world. This status is required by financing institutions for PV installations and reduces project risk.
DAS Solar reported significant net losses in 2024 and warned of their continuation into 2025 (margin pressure, inventory write-downs). In January 2026, exclusive negotiations were announced with TCL Zhonghuan regarding the acquisition of a controlling stake. The ownership change and ongoing losses represent a real risk to the fulfillment of 25–30-year warranty obligations by the current legal entity.
DAS Solar has only 6–7 years of manufacturing history, compared to Trina Solar (est. 1997) or Hyundai Energy Solutions, which have extensive, verifiable field installation portfolios. The stated degradation rate of 0.4%/year for N-type TOPCon is technically well-founded, but has not yet been confirmed by long-term real-world data from DAS Solar's own products.
- At 21.5% efficiency, this panel is on par with typical TOPCon 400-450W modules
- Power density of 215.1 W/m² is 5.1 W/m² below TOPCon 400-450W median (220.2 W/m²) - needs more roof space
- At -0.30%/°C, hot weather performance is typical for TOPCon 400-450W panels
- At 23.7 kg (1.7 kg above TOPCon 400-450W median of 22.0 kg), requires checking roof load capacity
- Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof
Specifications
Datasheet charts
Measured curves published by DAS Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 420 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 1783 panels of the same or similar size to this one, within ±10 mm. See them here Found 1914 panels of the same or similar size to this one, within ±25 mm. See them here Found 3392 panels of the same or similar size to this one, within ±50 mm. See them here Found 3970 panels of the same or similar size to this one, within ±100 mm. See them here