--- title: "Astronergy CHSM66N(DG)/F-BH-705 705W Solar Panel - Specs & Review | ComparePV" description: "Astronergy CHSM66N(DG)/F-BH-705 705W solar panel. Specs: 22.70% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm66n-dg-f-bh-705" updated: 2026-09-11 --- # Astronergy CHSM66N(DG)/F-BH-705 Middle of its segment, needs the roof space 420 panels in the segment TOPCon 700-750 W ## Identity - **Manufacturer:** Astronergy - **Model:** CHSM66N(DG)/F-BH-705 - **Series:** ASTRO N8 CHSM66N(DG)/F-BH - **Rated power:** 705 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 700-750 W (420 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 705 W | 715 W | Weak - bottom 22% | | | Module efficiency | 22.70% | 23.00% | Weak - bottom 23% | 3,307 | | Power density | 227.0 | 230.2 | Weak - bottom 21% | 3,361 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 38.0 kg | 38.0 kg | Weak - bottom 23% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.70% | 23.00% | Weak - bottom 23% | 3,307 | | Power density | 227.0 | 230.2 | Weak - bottom 21% | 3,361 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 53.9 | 52.9 | Weak - bottom 23% | 8,027 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **227.0 watts per square metre** - Bottom 21% of the TOPCon 700-750 W segment, against a median of 230.2. - **53.9 kg per kWp** - Bottom 23% of the TOPCon 700-750 W segment, against a median of 52.9. - **22.70% module efficiency** - Bottom 23% of the TOPCon 700-750 W segment, against a median of 23.00%. - **Best for:** Commercial and utility-scale. - **Not ideal for:** Roofs where every square metre has to count, weight-limited structures and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 705 W - **Efficiency:** 22.70 % - **Voltage at Pmax (Vmp):** 40.31 V - **Current at Pmax (Imp):** 17.49 A - **Open-circuit voltage (Voc):** 48.57 V - **Short-circuit current (Isc):** 18.43 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:** 0.043 %/degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 132 - **Bifacial:** yes ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 33 mm - **Weight:** 38.0 kg - **Area:** 3.11 m2 - **Power density:** 227.0 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:** 616 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 3307 of 14005 | | Power density | 3361 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 8027 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Industry-leading efficiency of 22.7–23.5%** - The upper efficiency limit of 23.5% places the series on par with the strongest competitors in the segment (Waaree HJT 23.5%, HY Solar TOPCon 23.5%), while Astronergy delivers this figure within a confirmed BNEF Tier-1 manufacturing framework — a distinction that cannot be taken for granted with less established peer comparables such as HY Solar and PolyCrown. - **Temperature coefficient of -0.28%/°C** - The N-type TOPCon cell architecture achieves a Pmax temperature coefficient of -0.28%/°C, compared to -0.34 to -0.37%/°C typical of standard PERC modules. In Polish climatic conditions, where module temperatures reach 60–70°C during summer, this translates to a real-world hourly energy yield gain of 2–3% over PERC at peak summer output. - **30-year linear power warranty (87.4% of rated power)** - The manufacturer guarantees ≥87.4% of nominal power output after 30 years of operation, which represents the premium standard for large-format bifacial modules. The warranty is backed by an international insurance policy, materially reducing the investor's financial risk over the long-term project horizon. - **~80% ±5% bifaciality with double-glass construction** - The double-glass design (2+2 mm) combined with ~80 ±5% bifaciality enables an additional 15–25% energy harvest from the rear side of the module in ground-mount installations with high-albedo surfaces or on rooftops with white TPO/PVC membranes. The rear glass layer also eliminates PID-related degradation and extends laminate service life compared to conventional backsheet designs. - **BNEF Tier-1 status and bankability** - Astronergy maintains continuous BNEF Tier-1 status (confirmed Q1 2026), ranking in the global top 6 among module manufacturers according to the BNEF 2023 ranking. This significantly facilitates project finance and non-recourse lending for utility-scale PV plants, where manufacturer bankability is a formal prerequisite imposed by lenders. ## Cons - **38 kg weight requires reinforced mounting structures** - The double-glass construction raises module weight to 38 kg — approximately 6–8 kg more than comparable single-glass modules in the same power class (~30–32 kg). For rooftop installations, this necessitates structural roof load verification and the use of heavier-duty racking rails, adding incremental balance-of-system (BoS) cost. - **15-year product warranty — below European premium standard** - A 15-year product warranty is the market norm among Chinese Tier-1 manufacturers, yet it falls short of the coverage offered by European and Korean premium players (e.g., REC Group: 25 years, Maxeon: 25 years). For projects with an investment horizon of 25 years or more, this gap may necessitate supplemental warranty insurance. ## About this series The Astronergy ASTRO N8 CHSM66N(DG)/F-BH module series is an advanced solution based on **n-type TOPCon cell technology**, which redefines efficiency standards in the Polish climate. Thanks to the elimination of the LID degradation phenomenon and a significant reduction in the impact of temperature on system operation, these panels ensure stable energy production for decades. A key differentiator is the **bifacial double glass design**, which allows for light absorption from both sides of the module, drastically increasing yields on ground-mounted installations and roofs covered with bright membranes. This series solves the problem of limited installation space, offering **increased power density** through the use of modern rectangular cells. It is a product dedicated to demanding commercial investments and solar farms where the lowest levelized cost of energy (LCOE) matters most. What sets it apart from the competition is its **exceptional efficiency in low-light conditions** and heavy-duty resistance to mechanical loads, which guarantees investment security in harsh weather conditions. By choosing ASTRO N8, investors receive **high resistance to material aging** effects, which translates into tangibly higher profits compared to standard p-type modules available on the market. It is an uncompromising combination of double-glass durability with the latest generation of n-type silicon. ## Notable figures - At 22.7% efficiency, this panel is on par with typical \*\*TOPCon 700-750W\*\* modules - At 226.9 W/m², this panel generates 3.2 W/m² less per unit area than \*\*TOPCon 700-750W\*\* median (230.2 W/m²) - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 700-750W\*\* median - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface - #3307 for efficiency, #2165 for temperature performance out of 14005 panels ## Questions ### How does the TOPCon technology in Astronergy ASTRO N8 panels differ from older p-type modules? The n-type TOPCon 4.0 cells used in the ASTRO N8 series eliminate Light-Induced Degradation (LID), which typically reduces the output of older p-type PERC modules within the first weeks of operation. Additionally, the power temperature coefficient is -0.28%/°C compared to the typical -0.35%/°C for p-type modules, resulting in higher energy yields on hot summer days. The net effect is meaningfully greater energy production over the entire 30-year operational lifetime. ### Are Astronergy ASTRO N8 CHSM66N(DG)/F-BH panels suitable for installation on a single-family residential roof? The ASTRO N8 series measures 2384×1303 mm and weighs approximately 35 kg due to its double glass construction consisting of two 2.0 mm tempered glass panes. These modules are designed primarily for commercial installations and utility-scale PV farms. Mounting them on residential rooftops is technically feasible but requires a robust load-bearing structure and an experienced installation crew. For small roofs with multiple obstructions such as chimneys and dormers, a smaller module format would be a more practical choice. ### How much more energy does a bifacial ASTRO N8 panel produce compared to a standard monofacial module? The ASTRO N8 series achieves a bifaciality factor of approximately 80% (±5%), which in practice translates to 5–25% additional energy yield through absorption of light reflected from the ground surface. The greatest gain is achieved in ground-mounted installations over light-colored gravel, white roofing membranes, or snow. In a typical ground-mounted installation in Poland, a realistic production increase of 8–15% relative to an equivalent monofacial module can be expected. ### What warranty does the manufacturer provide for the Astronergy ASTRO N8 CHSM66N(DG)/F-BH series? Astronergy provides a 15-year product warranty covering material and workmanship defects, as well as a 30-year linear power output warranty under which the module is guaranteed to retain at least 87.4% of its nominal power after three decades of operation. Astronergy is listed on the Bloomberg NEF Tier 1 index, which confirms the manufacturer's financial stability and the credibility of warranty claims being honored throughout that entire period. ### Does the double glass construction of the ASTRO N8 series provide adequate resistance to snow loads and hail typical of Polish climate conditions? Yes. The two tempered 2.0 mm glass panes form a structure rated for a front-side mechanical load of up to 5,400 Pa, corresponding to a snow depth exceeding 100 cm. The glass is certified to withstand hailstones up to 35 mm in diameter. The absence of a rear EVA backsheet also eliminates the risk of moisture-induced degradation in Poland's wet climate. This makes the ASTRO N8 series a particularly strong choice for PV farms in mountainous regions and areas with a high risk of icing. ### For which projects is the Astronergy ASTRO N8 CHSM66N(DG)/F-BH series the best choice? The ASTRO N8 series, with output up to 730 W, is intended primarily for commercial PV farms and large-scale industrial installations where minimizing the Levelized Cost of Energy (LCOE) is the key priority. Its high power density and reduced module count lower balance-of-system (BoS) costs for cabling and racking structures. The bifacial double glass design maximizes energy yield in ground-mounted installations over high-albedo surfaces. For residential prosumers seeking compact module formats, Astronergy offers better-suited series within its product portfolio. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/705730ASTRO-N8_CHSM66NDGF-BH_2384x1303x33_EN_20251014-1e92388f209b.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | Cooler, lighter, +2.5 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | -30 W, lighter, +2.3 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | Cooler, lighter, +2.3 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | Cooler, lighter, +2.2 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | -35 W, lighter, +2.1 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | -35 W, lighter, +2.1 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | -35 W, lighter, +2.1 pp | | [Astronergy CHSM66N(DG)/F-BH-710](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm66n-dg-f-bh-710) | 710 W | Very close match | | [Astronergy CHSM66N(DG)/F-BH-715](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm66n-dg-f-bh-715) | 715 W | +10 W, +0.3 pp | | [Astronergy CHSM66N(DG)/F-BH-720](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm66n-dg-f-bh-720) | 720 W | +15 W, +0.5 pp | | [Astronergy CHSM66N(DG)/F-BH-725](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm66n-dg-f-bh-725) | 725 W | +20 W, +0.6 pp | | [Astronergy CHSM66N(DG)/F-BH-730](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm66n-dg-f-bh-730) | 730 W | +25 W, +0.8 pp | | [Astronergy CHSM66N(DG)/F-BH-735](https://comparepv.com/panel/astronergy-chsm66n-dg-f-bh-735) | 735 W | +30 W, +1.0 pp | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +100 W, cooler, +2.4 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +95 W, cooler, +2.2 pp | | [AIKO AIKO-A795-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a795-grh78dw) | 795 W | +90 W, cooler, +2.1 pp | --- Source: https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm66n-dg-f-bh-705 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.