--- title: "DAS Solar DAS-DH156NA-640W 640W Solar Panel - Specs & Review | ComparePV" description: "DAS Solar DAS-DH156NA-640W 640W solar panel. Specs: 22.90% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/das-solar-das-dh156na-640w" updated: 2026-09-11 --- # DAS Solar DAS-DH156NA-640W Middle of its segment, weak in heat 1,086 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** DAS Solar - **Model:** DAS-DH156NA-640W - **Series:** DAS-DH156NA (Bifacial Double Glass Module) - **Rated power:** 640 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 600-650 W (1086 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 640 W | 620 W | Strong - top 9% | | | Module efficiency | 22.90% | 22.80% | Typical | 2,359 | | Power density | 229.0 | 227.7 | Typical | 2,389 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 19% | 6,093 | | Weight (kg) | 34.3 kg | 32.7 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.90% | 22.80% | Typical | 2,359 | | Power density | 229.0 | 227.7 | Typical | 2,389 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 19% | 6,093 | | Weight per kWp | 53.6 | 53.1 | Typical | 7,600 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.300 %/°C temperature coefficient** - Bottom 19% of the TOPCon 600-650 W segment, against a median of -0.290. - **Best for:** Commercial and utility-scale. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 640 W - **Efficiency:** 22.90 % - **Voltage at Pmax (Vmp):** 46.59 V - **Current at Pmax (Imp):** 13.74 A - **Open-circuit voltage (Voc):** 56.18 V - **Short-circuit current (Isc):** 14.48 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 - **Bifacial:** yes - **Bifacial gain:** 30.00 ### Physical - **Length:** 2465 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 34.3 kg - **Area:** 2.80 m2 - **Power density:** 229.0 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 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:** 559 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 2359 of 14005 | | Power density | 2389 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 7600 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Up to 23.3% efficiency – on par with top-tier competitors** - The series' peak efficiency of 23.3% matches the Astronergy ASTRO N5 and marginally exceeds the BYD AURO N NLBK-39 (23.25%). This places the series firmly among the leaders in the bifacial TOPCon 650 W segment, although the lower bound of 22.4% indicates a notable spread across module variants. - **Low linear degradation – 0.40%/year** - Following the first-year step (-1.00%), the module loses only 0.40% of rated power annually. Under a 30-year linear power warranty, this guarantees retention of at least ~87% of nominal output over the full service life — a result comparable to the best N-type models in the segment and better than a typical PERC warranty (25 years, 0.55%/year degradation). - **~80% bifaciality and durable glass-glass construction** - According to manufacturer documentation, the bifaciality factor reaches 80%, which — with adequate ground albedo (light-colored roofing, gravel, or snow) — can translate into an additional 10–25% energy yield over a monofacial module. The 2+2 mm dual-glass structure eliminates the backsheet as a long-term risk factor for UV degradation and moisture ingress. - **BNEF Tier 1 status and #2 TOPCon manufacturer globally** - DAS Solar appears on the BNEF Tier 1 bankable manufacturer list and reports over 28 GW of cumulative shipments and 30 GW of annual production capacity. Its #2 global ranking in the TOPCon segment (per PV Tech, 2023) reflects a manufacturing scale that materially reduces operational risk for project financiers. - **Favorable temperature coefficient of -0.30%/°C** - The Pmax temperature coefficient of -0.30%/°C outperforms typical PERC modules (-0.37 to -0.40%/°C) by approximately 0.08–0.10 percentage points. In the Polish climate — where module temperatures frequently exceed 60°C during summer — this meaningfully reduces thermal losses and improves the annual energy balance. ## Cons - **Lower efficiency than the Jinko Tiger Neo 66HL4M-BDX** - The top peer in this comparison, the Jinko Solar Tiger Neo 66HL4M-BDX, achieves an efficiency of 24.06% — 0.76 percentage points above the DAS-DH156NA's maximum of 23.3%. For area-constrained installations such as industrial rooftops, this translates into a meaningfully higher power yield per m² for an equivalent roof footprint. - **Short market track record (founded 2018)** - DAS Solar has been operating for only 8 years, compared to Jinko Solar (~2006) or BYD (~2008). Its bankability rating of BB (PV ModuleTech Q4 2023) — as opposed to the AA/AAA ratings of leading brands — may present an obstacle when securing project financing from conservative lending institutions. ## About this series The DAS Solar DAS-DH156NA series are bifacial glass-glass modules designed for maximum yield in locations where every square meter counts and stable performance in variable conditions. Thanks to **double-sided generation**, the panels effectively utilize reflected light from the ground, helping to genuinely increase energy production in ground-mounted installations, on light-coloured roofs, and in systems with appropriately designed support structures. The use of **N-type cells** supports high efficiency and better predictability in the long term, while the glass-glass construction improves resistance to environmental factors. A key feature of this series is its **symmetrical structure**, which minimizes the risk of micro-cracks and所谓的 hidden damage occurring during transport and installation. The modules also offer **better performance under low-light conditions**, which is significant given Polish weather conditions - overcast skies, fog, and transitional periods. This is a proposition for investors and contractors who prioritize reliability, predictable yields, and long-term project profitability. ## Notable figures - At 22.9% efficiency, this panel is on par with typical \*\*TOPCon 600-650W\*\* modules - At 228.9 W/m² power density, roof space requirements are typical for \*\*TOPCon 600-650W\*\* panels - At -0.30%/°C, hot weather performance is typical for \*\*TOPCon 600-650W\*\* panels - Weight of 34.3 kg is 1.6 kg above \*\*TOPCon 600-650W\*\* median (32.7 kg) - verify structural support - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces ## Questions ### What warranty coverage applies to DAS Solar DAS-DH156NA panels? The DAS-DH156NA series comes with a 15-year product warranty covering materials and workmanship, along with a 30-year linear power output warranty. Degradation is capped at 1% in the first year and 0.4% per year thereafter. After 30 years, the module is warranted to retain more than 87.4% of its nominal power output. This is one of the longest power warranties available on the market, backed by the manufacturer's Tier 1 status as rated by Bloomberg NEF. ### What are the benefits of bifaciality in the DAS-DH156NA series, and when does it pay off? The bifacial TOPCon cells harvest light from both the front side and light reflected from the ground surface, boosting energy yield without increasing the footprint of the installation. The bifaciality factor of the DAS-DH156NA series reaches approximately 80%. The gain is most pronounced on high-albedo surfaces such as gravel, concrete, or snow, and in ground-mounted systems with sufficient clearance beneath the modules. On dark rooftops with little to no reflectivity the benefit is reduced, though diffuse rear-side irradiance still contributes to additional yield. ### Will the DAS-DH156NA panels perform well in the Polish climate — under overcast skies and in winter? Yes. N-type TOPCon technology delivers superior low-irradiance performance compared to older PERC cells, which is particularly relevant in Poland where a significant portion of annual operating hours involve cloud cover or fog. The modules are rated for an operating temperature range of -40°C to +85°C, and the power temperature coefficient is -0.30%/°C — lower than that of typical P-type modules, which translates to smaller output losses on hot summer days. ### How much does the DAS-DH156NA module weigh, and is it difficult to install? The module weighs approximately 35 kg and measures 2465 × 1134 × 35 mm. This form factor is typical for large-format modules used in utility-scale ground-mounted systems, and at least a two-person installation crew should be planned for. The glass-glass construction with a symmetric frame reduces the risk of microcracks during transport and installation. A mounting system compatible with the 35 mm module thickness is required. ### How does TOPCon technology in the DAS-DH156NA differ from older PERC cells? TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell architecture featuring an additional passivation layer on the rear surface that suppresses charge carrier recombination. In practice, this results in higher module efficiency (up to 23.3% for the DAS-DH156NA series), a lower temperature coefficient, slower long-term degradation, and better performance under diffuse and low-light conditions. Older PERC cells are based on P-type technology and trail TOPCon across all of these key performance parameters. ### Is DAS Solar a reliable manufacturer, and is the DAS-DH156NA series still available? DAS Solar appears on the Bloomberg New Energy Finance Tier 1 list, which confirms the company's financial stability and manufacturing scale. The DAS-DH156NA series is currently active and available for purchase. The manufacturer has passed triple testing in accordance with the latest IEC standards. The company operates its own production facilities in China with certified quality-control processes in place. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/16-das-dh156na-en-625-650-ef-bc-882465-1134-30-ef-bc-89-v12-ab752efd9d5e.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +2.3 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +40 W, lighter, +2.3 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | Cooler, lighter, +2.1 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +2.1 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Cooler, lighter, +1.9 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | Cooler, lighter, +1.9 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, lighter, +1.9 pp | | [DAS Solar DAS-DH156NA-610](https://comparepv.com/panel/das-solar-das-dh156na-610) | 610 W | -30 W, -1.1 pp | | [DAS Solar DAS-DH156NA-615](https://comparepv.com/panel/das-solar-das-dh156na-615) | 615 W | -25 W, -0.9 pp | | [DAS Solar DAS-DH156NA-620](https://comparepv.com/panel/das-solar-das-dh156na-620) | 620 W | -20 W, -0.7 pp | | [DAS Solar DAS-DH156NA-625W](https://comparepv.com/panel/das-solar-das-dh156na-625w) | 625 W | -15 W, -0.5 pp | | [DAS Solar DAS-DH156NA-630W](https://comparepv.com/panel/das-solar-das-dh156na-630w) | 630 W | -10 W, -0.4 pp | | [DAS Solar DAS-DH156NA-635W](https://comparepv.com/panel/das-solar-das-dh156na-635w) | 635 W | Very close match | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +60 W, cooler, +2.1 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +55 W, cooler, +2.0 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +30 W, cooler, +1.9 pp | --- Source: https://comparepv.com/panel/das-solar-das-dh156na-640w 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.