--- title: "Astronergy CHSM78N(DG)/F-BH-640 640W Solar Panel - Specs & Review | ComparePV" description: "Astronergy CHSM78N(DG)/F-BH-640 640W solar panel. Specs: 22.90% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-640" updated: 2026-09-11 --- # Astronergy CHSM78N(DG)/F-BH-640 Solid all-round for its segment 1,086 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** Astronergy - **Model:** CHSM78N(DG)/F-BH-640 - **Series:** ASTRO N5 CHSM78N(DG)/F-BH - **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 | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 34.7 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 | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 54.2 | 53.1 | Typical | 8,447 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Utility-scale, commercial and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 640 W - **Efficiency:** 22.90 % - **Voltage at Pmax (Vmp):** 46.79 V - **Current at Pmax (Imp):** 13.68 A - **Open-circuit voltage (Voc):** 56.61 V - **Short-circuit current (Isc):** 14.35 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 - **NOCT:** 41 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:** 34.7 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 | 2165 of 14005 | | Weight | 8447 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Low temperature coefficient (-0.29%/°C)** - A Pmax temperature coefficient of -0.29%/°C places this series well above P-type PERC modules (typically -0.34 to -0.35%/°C). In practice, this translates to approximately 2–3% higher power output on sunny days at a cell temperature of 70°C compared to previous-generation modules. - **30-year linear power warranty, ≤0.4%/year degradation** - The manufacturer guarantees 99% of rated power after year 1, 87.4% after 25 years, and 84.95% after 30 years at a degradation rate of ≤0.4%/year. Peer comparables such as BYD AURO N and Einnova offer similar terms; however, many smaller suppliers in this segment cap their warranty at 25 years — making Astronergy a clear standout. - **BNEF Top 6 bankability (2023 ranking)** - Astronergy ranks in the top six of the BloombergNEF bankability index, directly facilitating project financing from banks and infrastructure funds. For large-scale PV projects, BNEF Tier 1 status is frequently a prerequisite for securing project finance. - **Dual glass + 5,400 Pa mechanical load rating** - The bifacial dual-glass construction provides a certified mechanical load resistance of 5,400 Pa — equivalent to approximately 3.2 m of snow cover or wind speeds exceeding 220 km/h — surpassing the requirements of most temperate-climate sites and meeting the standard expected for utility-scale installations. - **N-type TOPCon — no LID and reduced LeTID** - N-type cells virtually eliminate light-induced degradation (LID) characteristic of P-type PERC, while susceptibility to light and elevated temperature induced degradation (LeTID) is significantly lower. This results in meaningfully higher energy production during the initial months of operation compared to P-type modules of nominally equivalent STC power rating. ## Cons - **Efficiency up to 23.3% vs. Jinko Tiger Neo at 24.06%** - The highest-efficiency variant in the series reaches 23.3%, while its direct peer — the Jinko Solar Tiger Neo 66HL4M-BDX — offers 24.06% at the same power class (up to 650 Wp). The 0.76 percentage point gap may require installing 1–2 additional modules per 100 kWp in space-constrained applications to achieve the same energy yield. - **Weight of 34.7 kg — a constraint for rooftop installations** - The dual-glass construction results in a module weight of 34.7 kg (approx. 12.4 kg/m²), roughly 20–25% heavier than comparable single-glass modules of similar power. On rooftop installations over older structures, this may necessitate a structural engineering assessment and potential roof reinforcement, adding to the overall project cost. ## About this series The Astronergy ASTRO N5 CHSM78N(DG)/F-BH series panels represent an advanced solution based on **N-type TOPCon cell technology**, which effectively eliminates the problem of light-induced degradation. Due to the bifacial design with double glass, these modules maximize energy yields by absorbing radiation reflected from the ground, making them an ideal choice for large solar farms and demanding commercial installations. The application of **multilayer Double Glass protection** significantly enhances mechanical resistance to extreme weather conditions, such as strong winds or snow loads, while simultaneously extending the system's overall lifespan. A distinguishing feature of this series is its **exceptionally low temperature coefficient**, ensuring stable operation and high efficiency even on hot days when traditional modules lose power. This solution addresses the needs of investors looking to maximize the rate of return through **higher efficiency in low-light conditions** and minimized transmission losses. Compared to standard P-type modules, the ASTRO N5 series offers a slower performance decline over time, translating into real profits over long-term operation. It is a solid choice for professionals prioritizing technical innovations that directly reduce the **lowest levelized cost of energy LCOE** in large-scale projects. ## Notable figures - At 22.9% efficiency, this panel is on par with typical \*\*TOPCon 600-650W\*\* modules - Power density of 228.9 W/m² matches the \*\*TOPCon 600-650W\*\* median - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 600-650W\*\* panels - At 34.7 kg, this panel is 2.0 kg heavier than the \*\*TOPCon 600-650W\*\* median (32.7 kg) - more demanding for installation crews - #2359 for efficiency, #2165 for temperature performance out of 14005 panels ## Questions ### What warranty coverage applies to Astronergy ASTRO N5 CHSM78N(DG)/F-BH panels? The ASTRO N5 CHSM78N(DG)/F-BH series comes with a 15-year product warranty covering material and workmanship defects, and a 30-year linear power output warranty. Maximum allowable degradation in the first year is 1%, followed by no more than 0.4% per year thereafter, guaranteeing at least 84.95% of nominal power after 30 years of operation. The power warranty is backed by an international insurance policy, ensuring claims are practically enforceable. ### How do ASTRO N5 TOPCon panels differ from standard P-type modules? The N-type TOPCon cells used in the ASTRO N5 series are not subject to light-induced degradation (LID), which in P-type modules can reduce output by as much as 2–3% within the first few weeks of operation. A temperature coefficient of just -0.29%/°C, compared to a typical -0.35% for P-type, means lower power losses on hot days. Module efficiency reaching 23.3% allows more energy to be harvested from the same roof or ground area. ### Are Astronergy ASTRO N5 650W panels suitable for large-scale solar farms? Yes, the ASTRO N5 CHSM78N(DG)/F-BH series, rated up to 650W, was designed with utility-scale and commercial installations in mind. The high per-module power output reduces the total number of modules and the length of cabling required, lowering overall BoS costs. The bifacial double-glass construction increases energy yield on sites with high-albedo surfaces (concrete, sand, light-colored grass), and certification for a 1500 V DC system voltage simplifies the design of large string configurations. ### How does the bifacial technology in the ASTRO N5 series work, and how much additional energy can be gained? A bifacial module captures solar irradiance from both the front and rear surfaces, harvesting energy reflected from the ground beneath it. The actual bifacial gain depends on the albedo of the underlying surface and typically ranges from 5% to 15% compared to an equivalent monofacial module. The double-glass construction eliminates the rear backsheet, protecting the cells from moisture ingress and corrosion, which results in lower long-term degradation and an extended system lifetime. ### Can ASTRO N5 CHSM78N(DG)/F-BH panels withstand high winds and heavy snow loads? The ASTRO N5 series carries a certified mechanical load rating of 5,400 Pa, equivalent to approximately 550 kg per square meter. This provides resistance to extreme snow accumulation as well as strong wind gusts typical of Polish climatic conditions. The combination of an aluminum frame, tempered glass, and double-glass construction forms a robust enclosure that protects the module throughout the full 30-year power warranty period. ### Is Astronergy a reliable manufacturer, and is the ASTRO N5 series available in Poland? Astronergy is part of the CHINT Group and is classified as a Tier 1 manufacturer by Bloomberg NEF, reflecting the highest bankability rating and financial stability in the industry. The company has a long-standing presence in the European market, and the ASTRO N5 CHSM78N(DG)/F-BH series remains an active product line. The modules are available through Polish distributors of photovoltaic components; however, given their high per-unit power output (650W), they are primarily aimed at installers working on commercial and industrial-scale projects. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/625650ASTRO-N5_CHSM78NDGF-BH_2465x1134x30_EN_20240601-1bf46957f4d3.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 | +35 W, 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 | +30 W, lighter, +1.9 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +30 W, lighter, +1.9 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, lighter, +1.9 pp | | [Astronergy CHSM78N(DG)/F-BH-625W](https://comparepv.com/panel/astronergy-chsm78n-dg-f-bh-625w) | 625 W | -15 W, -0.5 pp | | [Astronergy CHSM78N(DG)/F-BH-630](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-630) | 630 W | -10 W, -0.4 pp | | [Astronergy CHSM78N(DG)/F-BH-635](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-635) | 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/astronergy-chint-new-energy-technology-co-ltd-chsm78n-dg-f-bh-640 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.