--- title: "DAH Solar DHN-78X16/DG-630 630W Solar Panel - Specs & Review | ComparePV" description: "DAH Solar DHN-78X16/DG-630 630W solar panel. Specs: 22.54% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/dah-dhn-78x16-dg-630" updated: 2026-09-11 --- # DAH Solar DHN-78X16/DG-630 Solid all-round for its segment 1,086 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** DAH Solar - **Model:** DHN-78X16/DG-630 - **Series:** DHN-78X16/DG - **Rated power:** 630 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) | 630 W | 620 W | Typical | | | Module efficiency | 22.54% | 22.80% | Typical | 3,920 | | Power density | 225.4 | 227.7 | Typical | 3,907 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 34.2 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 | 22.54% | 22.80% | Typical | 3,920 | | Power density | 225.4 | 227.7 | Typical | 3,907 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 54.3 | 53.1 | Typical | 8,524 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Utility-scale, commercial and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 630 W - **Efficiency:** 22.54 % - **Voltage at Pmax (Vmp):** 47.20 V - **Current at Pmax (Imp):** 13.35 A - **Open-circuit voltage (Voc):** 56.00 V - **Short-circuit current (Isc):** 14.20 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 156 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2465 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 34.2 kg - **Area:** 2.80 m2 - **Power density:** 225.4 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:** 551 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 3920 of 14005 | | Power density | 3907 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 8524 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Patented Full Screen Technology** - The unique frameless design, flush with the glass surface, eliminates dust and water accumulation along the module's bottom edge. The manufacturer documents an energy yield improvement of 6–15% compared to conventional framed panels — particularly significant in utility-scale installations with low tilt angles (≤10°), where sediment buildup is the primary source of PID losses. - **Efficiency Up to 22.9% — Top of Its Class** - The 640 Wp variant achieves 22.9% efficiency, matching the Suntech Ultra V Pro (22.9%) and outperforming the REC Alpha Pro M Series (22.5%) and MY Solar HJT (22.61%). Reaching this figure with TOPCon — which is less costly to manufacture than HJT — reflects a high level of process maturity in DAH's cell production. - **Low Degradation Rate with N-Type TOPCon Cells** - N-type TOPCon cells exhibit degradation of ≤1% in Year 1 and ≤0.4%/year in Years 2–30, guaranteeing 87.4% of rated power output after 30 years. By comparison, conventional P-type PERC modules typically degrade at 0.55–0.6%/year, retaining approximately 83–84% of rated power after 30 years — roughly 4 percentage points less. - **30-Year Linear Power Warranty** - The warranty guarantees ≥89.4% of rated power after 25 years and ≥87.4% after 30 years, with a linear degradation profile. This directly supports project bankability in PV farm financing — lenders typically require a minimum 25-year linear warranty, while the 30-year horizon provides an additional buffer in DCF models. - **BNEF Tier 1 Status (Q4 2025 and Q1 2026)** - DAH Solar has maintained BNEF Tier 1 status continuously for several consecutive quarters, reaffirmed in Q4 2025 and Q1 2026. This is a key formal requirement for securing project finance and bank guarantees for utility-scale PV installations above 1 MW. - **Double Glass Construction — Mechanical Durability** - The bifacial double glass design eliminates the risk of PID and moisture-induced degradation by removing the rear-side EVA encapsulant, making it especially well-suited for high-humidity environments. The dual-glass structure increases resistance to snow loads (typically up to 5,400 Pa) and wind loads (2,400 Pa), facilitating certification for installations in snow load zones ≥III per EN 1991-1-3. ## Cons - **Product Warranty Limited to 15 Years** - The materials and workmanship warranty covers only 15 years, while premium competitors in the same power class offer 25 years (e.g., REC Alpha Pro M Series). For investors financing a PV farm over a 20+ year horizon, this creates a potential warranty gap in the later years of operation, which may adversely affect project due diligence assessments. ## About this series The DAH DHN-78X16/DG panel series introduces groundbreaking **Full Screen** technology to the Polish market, which effectively eliminates the problem of dust and water accumulation on the lower edge of the module. Thanks to the unique frame design, the glass surface is perfectly flush with its edge, allowing contaminants to flow off freely during rainfall. This solution translates directly into higher energy yields, especially in installations with a low tilt angle, where traditional panels lose efficiency due to accumulated sediment. At the heart of these modules are high-efficiency **N-Type TOPCon cells**, characterized by excellent resistance to degradation and great efficiency under low light conditions. The implemented **bifacial double glass** technology allows for additional utilization of light reflected from the ground, which, combined with the large 78-cell format, maximizes power output. This series is primarily dedicated to photovoltaic farms and large industrial facilities, where durability and minimization of maintenance costs are key. DAH DHN-78X16/DG stands out from the competition with its **patented self-cleaning design**, which solves real operational problems, ensuring **stable energy gains** for decades without the need for frequent panel cleaning. ## Notable figures - At 22.5% efficiency, this panel is on par with typical \*\*TOPCon 600-650W\*\* modules - Power density of 225.4 W/m² matches the \*\*TOPCon 600-650W\*\* median - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 600-650W\*\* median - At 34.2 kg, this panel is 1.5 kg heavier than the \*\*TOPCon 600-650W\*\* median (32.7 kg) - more demanding for installation crews - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface ## Questions ### Is the DAH Solar DHN-78X16/DG series still available for purchase? The DHN-78X16/DG series has been discontinued and is no longer offered as new stock by authorized distributors. Isolated units may still appear in warehouse inventories, but availability is extremely limited. If you are looking for modules with similar specifications — N-Type TOPCon, bifacial double glass, power output above 600 W — it is worth considering newer DAH Solar series or products from other Tier 1 manufacturers in this power class. ### What is the Full Screen technology in DAH DHN-78X16/DG panels and why does it matter? Full Screen technology means that the glass surface is flush with the frame edge, eliminating the lower frame channel where dust, sand, and water traditionally accumulate. The manufacturer estimates that built-up soiling can cause between 6% and 15% annual generation losses. With this design, contaminants wash off freely during rainfall — a particularly valuable feature in ground-mounted installations with low tilt angles, where natural self-cleaning by precipitation is otherwise limited. ### What warranty is provided for the DAH Solar DHN-78X16/DG panels? The manufacturer offers a 15-year product warranty covering material and workmanship defects, along with a 30-year power output warranty. After 30 years, the module is guaranteed to retain at least 87.4% of its nominal power. This is one of the longest power warranties available on the market, making this series particularly attractive for investments with a long payback horizon, such as utility-scale photovoltaic farms. ### How much additional energy can the DHN-78X16/DG panels generate through bifaciality? The DHN-78X16/DG series achieves a bifaciality factor of approximately 85%, with typical rear-side energy gain ranging from 5% to 25% depending on ground albedo. The best results are obtained over bright gravel surfaces or white roofing membranes. With a front-side peak power of 640 W, real-world yields from a ground-mounted installation can exceed 670–700 W equivalent under optimal conditions. ### Do the DAH DHN-78X16/DG panels perform well in winter and under overcast conditions? Yes. N-Type TOPCon cells feature a low temperature coefficient of power at -0.29%/°C, meaning smaller losses on hot days compared to PERC cells (-0.35%/°C). In winter, at low ambient temperatures, the module actually operates more efficiently than in summer. N-Type technology also delivers superior performance under diffuse light, resulting in higher energy yields on the overcast days that are characteristic of the Polish climate. ### What types of installations are the DAH Solar DHN-78X16/DG modules, rated up to 640 W, suited for? Due to their large physical dimensions (2465 × 1134 mm) and weight of approximately 35 kg, the DHN-78X16/DG series is intended primarily for utility-scale photovoltaic farms and large industrial or commercial facilities with flat roofs or ground-mounted racking structures. They are not suitable for typical pitched roofs on residential buildings, where smaller module formats are a better fit. The modules support a system voltage of up to 1500 V, which is the standard for utility-scale installations. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/en-dhn-78x16-dg-620-635w-a26da74a545a.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +2.7 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +50 W, lighter, +2.7 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +45 W, lighter, +2.5 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +2.5 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +40 W, lighter, +2.3 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +40 W, lighter, +2.3 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, lighter, +2.3 pp | | [DAH Solar DAS-DH156NA-610](https://comparepv.com/panel/dah-solar-das-dh156na-610) | 610 W | -20 W, hotter, -0.7 pp | | [DAH Solar DAS-DH156NA-615](https://comparepv.com/panel/dah-solar-das-dh156na-615) | 615 W | -15 W, hotter, -0.5 pp | | [DAH Solar DHN-78X16/DG-620W](https://comparepv.com/panel/dah-dhn-78x16-dg-620w) | 620 W | -10 W, -0.4 pp | | [DAH Solar DHN-78X16/DG-625W](https://comparepv.com/panel/dah-dhn-78x16-dg-625w) | 625 W | Very close match | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +70 W, cooler, +2.5 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +65 W, cooler, +2.4 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +40 W, cooler, +2.3 pp | --- Source: https://comparepv.com/panel/dah-dhn-78x16-dg-630 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.