--- title: "DAS Solar DAS-DH108NA-420 420W Solar Panel - Specs & Review | ComparePV" description: "DAS Solar DAS-DH108NA-420 420W solar panel. Specs: 21.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/das-solar-das-dh108na-420" updated: 2026-09-11 --- # DAS Solar DAS-DH108NA-420 Middle of its segment, modest efficiency 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** DAS Solar - **Model:** DAS-DH108NA-420 - **Series:** DAON mini Bifacial Double Glass Module - **Rated power:** 420 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 400-450 W (1218 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 420 W | 435 W | Weak - bottom 16% | | | Module efficiency | 21.50% | 22.00% | Weak - bottom 17% | 7,958 | | Power density | 215.1 | 220.2 | Weak - bottom 19% | 7,882 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,093 | | Weight (kg) | 23.7 kg | 22.0 kg | Weak - bottom 18% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.50% | 22.00% | Weak - bottom 17% | 7,958 | | Power density | 215.1 | 220.2 | Weak - bottom 19% | 7,882 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,093 | | Weight per kWp | 56.4 | 51.4 | Weak - bottom 18% | 10,649 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **21.50% module efficiency** - Bottom 17% of the TOPCon 400-450 W segment, against a median of 22.00%. - **56.4 kg per kWp** - Bottom 18% of the TOPCon 400-450 W segment, against a median of 51.4. - **215.1 watts per square metre** - Bottom 19% of the TOPCon 400-450 W segment, against a median of 220.2. - **Best for:** Residential and shaded-installations. - **Not ideal for:** Tight roof space, weight-limited structures and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 420 W - **Efficiency:** 21.50 % - **Voltage at Pmax (Vmp):** 32.02 V - **Current at Pmax (Imp):** 13.12 A - **Open-circuit voltage (Voc):** 38.48 V - **Short-circuit current (Isc):** 13.78 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 - **Bifacial:** yes - **Bifacial gain:** 30.00 ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 23.7 kg - **Area:** 1.95 m2 - **Power density:** 215.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 367 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7958 of 14005 | | Power density | 7882 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 10649 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type TOPCon – Low Degradation and High Efficiency** - 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%). - **30-Year Linear Power Warranty** - 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. - **Bifacial Glass-Glass Construction** - 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. - **Mini Format – Installation on Challenging Roofs** - 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. - **Confirmed BNEF Tier-1 Status** - 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. ## Cons - **Financial Losses and Ownership Uncertainty** - 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. - **Limited Operating History (est. 2018)** - 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. ## About this series 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. ## Notable figures - 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 ## Questions ### Are the DAS Solar DAON mini Bifacial panels suitable for roofs with limited load-bearing capacity? Yes, the DAON mini series was specifically designed for installations on roofs with complex geometry or low structural load capacity. The compact dimensions and optimized module weight simplify on-roof transport and make installation on lighter substructures more practical. This is one of the key differentiators of this series compared to standard, heavier 72-cell modules. ### What warranty is offered on the DAS Solar DAON mini Double Glass panels? The DAON mini series is covered by a 25-year product warranty (covering material and workmanship defects) and a 30-year linear power output warranty. This means the manufacturer guarantees a specified minimum energy production level for three decades. Such an extended power warranty is the industry standard for glass-glass modules based on N-type TOPCon technology, which exhibits exceptionally low annual degradation rates. ### What is TOPCon technology and why should I choose it in the DAS Solar DAON mini panels? TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology that delivers higher efficiency and lower annual degradation than the widely used P-type PERC cells. In practice, this translates into greater energy yield from the same roof area and a slower decline in power output over time. For DAS Solar DAON mini modules, annual degradation after the first year is typically around 0.4%, resulting in a better return on investment throughout the full 30-year operational lifetime. ### Does the bifacial DAS Solar DAON mini module generate more energy in the Polish climate? Yes, although the rear-side gain depends on the type of surface beneath the array. In Poland, the greatest benefits are achieved in ground-mounted installations over light-colored gravel or snow cover, where the albedo coefficient can reach 80–90%. On roofs covered with dark tiles the bifacial gain is lower; however, the glass-glass construction still provides longer service life and superior resistance to the weather conditions typical of the Polish climate. ### What is the peak power output of the DAS Solar DAON mini panels and how many modules do I need for a 10 kWp installation? The peak power output of a single DAON mini module is 425 Wp. To build a 10 kWp system, approximately 24 panels from this series are therefore required. Thanks to the module's compact form factor, this number of panels can fit even on roofs with a smaller available area while maintaining a high power density per square meter. ### Do the DAS Solar DAON mini panels perform well under cloudy conditions and low irradiance? Yes, one of the primary advantages of the N-type TOPCon technology used in the DAON mini series is its high performance under diffuse and low-light conditions. The modules generate more energy on overcast days and during low-sun periods than their P-type PERC counterparts. This translates into a longer effective daily generation window and higher annual energy yield in the Polish climate. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Datasheet_-_DAS-DH108NA-xxx_410-430_Black-cfb607dbd2d8.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Just Solar JST-EDMH-(445-465)W-TD (465W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-465w-class) | 465 W | +45 W, lighter, +2.3 pp | | [Luxor Solar LX-465M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-465m-182r-96-gg) | 465 W | +45 W, cooler, +2.3 pp | | [Maxeon SPR-MAX7-470](https://comparepv.com/panel/maxeon-spr-max7-470) | 470 W | +50 W, +2.2 pp, +10 yr warranty | | [AIKO AIKO-A470-MAH54Mb](https://comparepv.com/panel/aiko-aiko-a470-mah54mb) | 470 W | +50 W, cooler, +2.1 pp | | [AIKO AIKO-A460-MAH54Mb](https://comparepv.com/panel/aiko-shenzhen-aiko-digital-energy-technology-co-ltd-aiko-a460-mah54mb-1) | 460 W | +40 W, lighter, +2.1 pp | | [TCL Zhonghuan HSM-BD54-LA470](https://comparepv.com/panel/tcl-zhonghuan-hsm-bd54-la470) | 470 W | +50 W, cooler, +2.1 pp | | [DAS Solar DAS-DH108NA-410W](https://comparepv.com/panel/daon-das-dh108na-410w) | 410 W | -10 W, -0.5 pp | | [DAS Solar DAS-DH108NA-415W](https://comparepv.com/panel/daon-das-dh108na-415w) | 415 W | Very close match | | [DAS Solar DAS-DH108NA-425W](https://comparepv.com/panel/daon-das-dh108na-425w) | 425 W | Lighter, +0.3 pp | | [DAS Solar DAS-DH108NA-430W](https://comparepv.com/panel/daon-das-dh108na-430w) | 430 W | +10 W, lighter, +0.5 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +90 W, cooler, +3.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +75 W, cooler, +3.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +85 W, cooler, +3.2 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +70 W, cooler, +3.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +80 W, cooler, +3.0 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +80 W, cooler, +3.0 pp | --- Source: https://comparepv.com/panel/das-solar-das-dh108na-420 Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.