--- title: "Astronergy ASTRO N5s CHSM54N-HC-435W 435W Solar Panel - Specs & Review | ComparePV" description: "Astronergy ASTRO N5s CHSM54N-HC-435W 435W solar panel. Specs: 22.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/astronergy-astro-n5s-chsm54n-hc-435w" updated: 2026-09-11 --- # Astronergy ASTRO N5s CHSM54N-HC-435W Efficiency leader, no clear weak spot 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Astronergy - **Model:** ASTRO N5s CHSM54N-HC-435W - **Series:** ASTRO N5s CHSM54N-HC Monofacial Series - **Rated power:** 435 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 400-450 W (1218 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 435 W | 435 W | Typical | | | Module efficiency | 22.30% | 22.00% | Strong - top 17% | 5,100 | | Power density | 222.8 | 220.2 | Strong - top 17% | 5,150 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 21.3 kg | 22.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.30% | 22.00% | Strong - top 17% | 5,100 | | Power density | 222.8 | 220.2 | Strong - top 17% | 5,150 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 49.0 | 51.4 | Typical | 2,656 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **22.30% module efficiency** - Top 17% of the TOPCon 400-450 W segment, against a median of 22.00%. - **222.8 watts per square metre** - Top 17% of the TOPCon 400-450 W segment, against a median of 220.2. - **Best for:** Residential and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 435 W - **Efficiency:** 22.30 % - **Voltage at Pmax (Vmp):** 32.44 V - **Current at Pmax (Imp):** 13.41 A - **Open-circuit voltage (Voc):** 38.60 V - **Short-circuit current (Isc):** 14.19 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:** 108 ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 21.3 kg - **Area:** 1.95 m2 - **Power density:** 222.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 380 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 5100 of 14005 | | Power density | 5150 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 2656 of 14005 | | Warranty | 21 of 14005 | ## Pros - **N-type TOPCon technology with low degradation** - N-type TOPCon cells offer a degradation rate of 1% in the first year and only 0.4%/year in the subsequent 29 years – a significant improvement compared to PERC technology (typically 2% / 0.45–0.55%/year). This guarantees a minimum of 87.4% of the nominal power after 30 years of operation. - **Highest efficiency within the segment** - The maximum efficiency of 22.8% (for the 445 Wp model) places this series above direct competitors such as Q-Cells Q.TRON BLACK (22.3%), Solitek SOLRIF D Satin (22.06%), and SunEvo SE6-46SC EVOX (21.4%). The higher power density allows for achieving the desired output on a smaller roof area. - **Low temperature coefficient** - The temperature coefficient of Pmax is -0.29%/°C, which, under typical Polish climatic conditions (summer peak temperatures of 40–60°C on the panel surface), results in significantly lower thermal losses compared to PERC modules with a typical -0.35%/°C coefficient. This directly translates to higher energy yield on hot days. - **30-year performance warranty** - Astronergy offers a 30-year linear warranty with a 87.4% performance guarantee after 30 years – which is at least 5 years longer than the standard 25-year warranty offered by most Tier-1 manufacturers (e.g., JA Solar, Trina Solar). The warranty is insured by an international insurance company (as stated in the official datasheet). - **Compact size for residential roofs** - With dimensions of 1722 x 1134 x 30 mm (108 half-cut cells), this module provides a high power output of 425–445 W, while maintaining a relatively small module surface area. This makes it ideal for designing installations on typical pitched roofs with limited usable space. ## Cons - **The product line has been discontinued.** - The ASTRO N5s CHSM54N-HC series was produced exclusively between 2022 and 2024, and is now officially discontinued. The limited availability of new modules makes it difficult to expand existing installations with identical panels in the future, and service and replacement options will gradually become more scarce. When planning a new installation, it is advisable to consider the currently produced series (e.g., ASTRO N7s). - **No dual-sided option** - The series is monofacial only (is\_bifacial: false). Competitive solutions in the same power and technology range (N-type TOPCon) are increasingly offering bifacial versions, with the potential for a 5–15% gain in energy yield on reflective surfaces, which could be significant for installations on reflective sheets or gravel. ## About this series The ASTRO N5s CHSM54N-HC series consists of advanced modules based on n-type TOPCon technology that set new efficiency standards in rooftop installations. Thanks to the use of n-type cells, these panels offer significantly lower annual degradation and better performance in low-light conditions, which directly translates into higher energy yields in the long term. They are distinguished by a smaller size while maintaining high power output, effectively solving the problem of limited space on the roofs of single-family houses. The construction based on **n-type TOPCon** technology guarantees excellent resistance to the PID phenomenon and a minimal temperature coefficient, ensuring the system operates stably even during hot days. It is an ideal solution for prosumers looking for **high power density** and an aesthetic finish. The use of **Half-cut cells** additionally reduces losses resulting from partial shading, significantly increasing the reliability of the entire installation. Compared to the competition, this series stands out with an optimal price-to-quality ratio, offering a **long-term performance warranty** that effectively protects the investment for decades. It is a choice for those who focus on substantive innovations that realistically shorten the payback period of investments in modern photovoltaics. ## Notable figures - At 22.3% efficiency, this panel is on par with typical \*\*TOPCon 400-450W\*\* modules - At 222.8 W/m² power density, roof space requirements are typical for \*\*TOPCon 400-450W\*\* panels - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 400-450W\*\* median - Ranked #5100 out of 14005 panels for efficiency in the database ## Questions ### Is the Astronergy ASTRO N5s CHSM54N-HC series still available for purchase? The ASTRO N5s CHSM54N-HC series has been discontinued and is no longer actively offered by Astronergy. Remaining stock may still be available through distributors' warehouses; however, supply is limited. If you require a similar n-type TOPCon technology from Astronergy, it is advisable to contact your distributor for information on current successor series within the manufacturer's portfolio. ### What warranty does the Astronergy ASTRO N5s CHSM54N-HC carry, and what does it cover? Astronergy provides a 15-year product warranty against manufacturing defects and a 30-year linear power output warranty for the ASTRO N5s CHSM54N-HC series. After 30 years of operation, the module is guaranteed to retain at least 87.4% of its original nominal power. The performance warranty is additionally backed by an international insurance provider, offering an extra layer of protection for your investment. ### What efficiency do the ASTRO N5s CHSM54N-HC panels achieve, and what factors contribute to their performance? The ASTRO N5s CHSM54N-HC modules achieve a module efficiency of approximately 22%, which is an excellent result for rooftop installations. This performance is attributable to the n-type TOPCon cell technology combined with 108-cell half-cut architecture. The temperature coefficient is only -0.29%/°C, meaning that during summer months — when conventional panels suffer significant power losses due to high temperatures — these modules retain the majority of their nominal output. ### Are the Astronergy ASTRO N5s CHSM54N-HC panels suitable for a small roof with limited available area? Yes, the CHSM54N-HC series is a strong choice for installations with constrained roof space. With dimensions of 1722 × 1134 × 30 mm and an output of up to 445 W, the module delivers high power density per square meter. Its more compact footprint compared to 60-cell modules allows more total power to be installed within the same roof area, which is particularly advantageous on residential rooftops with multiple obstructions. ### How does the n-type TOPCon technology in the ASTRO N5s series differ from older p-type panels? The n-type TOPCon cells used in the ASTRO N5s series exhibit significantly lower annual degradation rates compared to standard p-type PERC cells. They are also more resistant to Potential Induced Degradation (PID) and perform better under diffuse irradiance and overcast conditions. In practice, this translates to higher energy yield over the full system lifetime and a shorter investment payback period. ### How does the half-cut cell design in the ASTRO N5s CHSM54N-HC panels help under partial roof shading? Half-cut technology involves splitting each cell into two halves, which reduces internal resistance and lowers resistive heat losses. The key advantage, however, is the division of the module into two electrically independent strings — shading of the upper half of the panel, for example by a chimney or dormer windows, does not shut down the entire module. This directly results in measurably higher energy yields on rooftops with obstructions. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/425445ASTRO-N5s_CHSM54N-HC_1722x1134x30_EN_20240105-897dcf45f2d8.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | +50 W, cooler, +2.0 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | +50 W, cooler, +2.0 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | +50 W, cooler, +2.0 pp | | [Gokin GK-5-54HG-485M](https://comparepv.com/panel/gokin-gk-5-54hg-485m) | 485 W | +50 W, cooler, +2.0 pp | | [Heckert Solar ZEUS 3.0+ 108 485WP](https://comparepv.com/panel/heckert-solar-zeus-3-0-108-485wp) | 485 W | +50 W, cooler, +2.0 pp | | [Astronergy CHSM54N(BL)-HC / CHSM54N(BLH)-HC (420W class)](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm54n-bl-hc-chsm54n-blh-hc-420w-class) | 420 W | -15 W, -0.8 pp | | [Astronergy CHSM54N(BL)-HC / CHSM54N(BLH)-HC (425W class)](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm54n-bl-hc-chsm54n-blh-hc-425w-class) | 425 W | -10 W, -0.5 pp | | [Astronergy CHSM54N(BL)-HC / CHSM54N(BLH)-HC (430W class)](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm54n-bl-hc-chsm54n-blh-hc-430w-class) | 430 W | -0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +75 W, cooler, +2.7 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +60 W, cooler, +2.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +70 W, cooler, +2.4 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +55 W, cooler, +2.2 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +65 W, cooler, +2.2 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +65 W, cooler, +2.2 pp | --- Source: https://comparepv.com/panel/astronergy-astro-n5s-chsm54n-hc-435w Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.