--- title: "Astronergy CHSM48RN(DG)(BLH)/F-BH-450 450W Solar Panel - Specs & Review | ComparePV" description: "Astronergy CHSM48RN(DG)(BLH)/F-BH-450 450W solar panel. Specs: 22.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm48rn-dg-blh-f-bh-450" updated: 2026-09-11 --- # Astronergy CHSM48RN(DG)(BLH)/F-BH-450 Middle of its segment, heavy for its output 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** Astronergy - **Model:** CHSM48RN(DG)(BLH)/F-BH-450 - **Series:** ASTRO N7s 2.0 Bifacial Series - **Rated power:** 450 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 450-500 W (1089 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 450 W | 465 W | Weak - bottom 9% | | | Module efficiency | 22.50% | 22.52% | Typical | 4,222 | | Power density | 225.2 | 225.2 | Typical | 4,225 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 24.5 kg | 24.0 kg | Weak - bottom 23% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.50% | 22.52% | Typical | 4,222 | | Power density | 225.2 | 225.2 | Typical | 4,225 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 54.4 | 52.2 | Weak - bottom 23% | 8,755 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **54.4 kg per kWp** - Bottom 23% of the TOPCon 450-500 W segment, against a median of 52.2. - **Best for:** Residential and commercial. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 450 W - **Efficiency:** 22.50 % - **Voltage at Pmax (Vmp):** 30.51 V - **Current at Pmax (Imp):** 14.75 A - **Open-circuit voltage (Voc):** 36.59 V - **Short-circuit current (Isc):** 15.61 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:** 96 - **Bifacial:** yes ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 24.5 kg - **Area:** 2.00 m2 - **Power density:** 225.2 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:** 393 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 4222 of 14005 | | Power density | 4225 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 8755 of 14005 | | Warranty | 21 of 14005 | ## Pros - **TOPCon 5.0 + Zero Busbar – Higher Yield vs. Previous Generation** - TOPCon 5.0 technology raises cell efficiency by 0.4–0.55 percentage points over TOPCon 4.0, while the Zero Busbar (ZBB) layout eliminates shading from conductive ribbons, pushing bifaciality to ≥85% — more than 5 pp above a conventional multi-busbar (MBB) design. The result is a measurably higher annual energy yield with no increase in module footprint. - **Temperature Coefficient of –0.29%/°C** - A Pmax temperature coefficient of –0.29%/°C outperforms typical PERC modules (–0.34%/°C) and ranks among the best available TOPCon products in this power class. In climates where module temperatures reach 60–70°C in summer, the 0.05 pp TC advantage translates to approximately 1.5–2.5% higher seasonal yield compared to an average PERC module. - **30-Year Linear Power Warranty, 87.4% Retention** - Guaranteed degradation of ≤0.4%/year from year two onward and power retention of ≥87.4% after 30 years exceeds the standard 25-year warranties offered by most competitors in this power segment. The warranty is backed by an independent insurer (Tier 1 Warranty), reducing counterparty risk in the event of manufacturer-side issues. - **BNEF Tier 1 Manufacturer, Top 7 Globally** - Astronergy (Chint) appears on the BNEF Tier 1 list with an annual manufacturing capacity of 56 GW (Q2 2025 data), ranking in the global top seven just behind Canadian Solar. Direct peers for this series — Recom and Sunlike Solar — operate at significantly smaller scale, making Astronergy the stronger bankability choice for projects requiring third-party financing. - **Full-Black Variants with No Efficiency Compromise** - The series includes modules with a black light-redirecting backsheet (BLH) that maintain full efficiency of 22.5–23.5% while delivering all-black aesthetics — a key advantage in the residential and C&I segments where homeowners' associations or heritage preservation requirements increasingly mandate low-visibility panel designs. ## About this series Astronergy ASTRO N7s 2.0 Bifacial series are modules designed for maximum yield from the same surface area - combining n-type TOPCon cells with a bifacial structure that genuinely harnesses reflected light. What sets them apart is the **TOPCon 5.0 technology**, focused on high efficiency and stable performance over the long term, and **ZBB (zero busbar)**, a solution minimizing shading from conductor traces and resistive losses - translating to better performance in partial shade and high temperatures. In practice, this series addresses typical roof installation challenges: limited space, the need for aesthetic integration, and the requirement for reliable performance over the years. Full black variants with **black light-directing film** help maintain a seamless roof appearance without sacrificing performance. Furthermore, the **bifacial structure** enhances durability and supports longevity in demanding conditions. ASTRO N7s 2.0 Bifacial is an excellent choice for homes, small businesses, and C&I projects, where yield, aesthetics, and reliability matter just as much as table specifications. ## Notable figures - At 22.5% efficiency, this panel is on par with typical \*\*TOPCon 450-500W\*\* modules - At 225.2 W/m² power density, roof space requirements are typical for \*\*TOPCon 450-500W\*\* panels - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 450-500W\*\* panels - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface - Ranked #4222 out of 14005 panels for efficiency in the database ## Questions ### What warranty applies to the Astronergy ASTRO N7s 2.0 Bifacial panels? The ASTRO N7s 2.0 Bifacial series comes with a 25-year product warranty and a 30-year power output warranty. The manufacturer guarantees degradation of no more than 1% in the first year and a maximum of 0.4% per year thereafter, meaning the module will retain over 87% of its nominal power after 30 years. This is one of the strongest warranty performance figures in the TOPCon panel class. ### What is ZBB technology in the ASTRO N7s 2.0 panels, and does it genuinely improve energy yield? ZBB (Zero Busbar) eliminates conventional metal busbars on the cell and replaces them with a dense network of fine interconnecting wires. This reduces cell shading and lowers series resistance. In practice, it translates into better performance under partial shading conditions and at elevated temperatures, which is particularly relevant for rooftop installations in Poland. ### Are the ASTRO N7s 2.0 Bifacial panels suitable for a pitched roof with limited available area? Yes. The 48-cell variant (e.g., the 470 W full black) has a footprint of under 2 m², allowing installation by a single person and simplifying transport across the roof. With a module efficiency of up to 23.8%, fewer panels are needed to achieve the same energy output as older, lower-efficiency modules — a critical advantage when roof space is constrained. ### How much additional energy does the bifacial design of the ASTRO N7s 2.0 panels generate? The bifaciality factor reaches up to 85%, meaning the rear side of the panel can harvest up to 85% of the energy captured by the front side under equivalent irradiance conditions. Real-world gain depends on the albedo of the surface beneath the array: a light-colored gravel bed, white roofing membrane, or snow cover can add between 5% and 15% to annual energy production. On a typical dark pitched roof, this effect is minimal, which is why bifacial technology delivers its best results in ground-mount or flat-roof installations with a high-albedo finish. ### Is Astronergy a reliable manufacturer, and is it on the Tier 1 list? Yes, Astronergy (the solar brand of Chint Group) is listed on the BloombergNEF Tier 1 module manufacturers list, confirming the company's financial capability to honor warranty claims throughout the full warranty period. The company has been manufacturing solar panels since 2006 and supplies modules to both the residential prosumer market and large-scale utility projects worldwide. ### What is the difference between the ASTRO N7s 2.0 full black variant and the standard bifacial variant? The full black variant uses a black light-redirecting backsheet instead of a white one, giving the module a uniform dark appearance that blends seamlessly with roof tiles. The manufacturer notes that this backsheet distributes mechanical stress more evenly, reducing the risk of microcracks. Module efficiency remains comparable; however, the rear-side albedo gain is lower than in the glass-glass bifacial version with a light background, which is why the full black variant is primarily chosen for installations where aesthetics take priority over maximum bifacial yield. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/450470astro-n7s-2-0-chsm48rndgblhf-bh-1762-1134-30-2-0-glass-eb201678a81d.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +45 W, lighter, +2.3 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +40 W, lighter, +2.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +50 W, cooler, +2.0 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +50 W, lighter, +2.0 pp | | [Gokin GK-3-54HGb-500M](https://comparepv.com/panel/gokin-gk-3-54hgb-500m) | 500 W | +50 W, lighter, +2.0 pp | | [GCL GCL-NR10R/54BGDF](https://comparepv.com/panel/gcl-gcl-nr10r-54bgdf) | 500 W | +50 W, cooler, +2.0 pp | | [Astronergy CHSM48RN(DG)/F-BH-440](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm48rn-dg-f-bh-440) | 440 W | -10 W, -0.5 pp | | [Astronergy CHSM48RN(DG)/F-BH-445](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm48rn-dg-f-bh-445) | 445 W | Very close match | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +60 W, cooler, +2.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +55 W, cooler, +2.2 pp | --- Source: https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm48rn-dg-blh-f-bh-450 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.