--- title: "Astronergy CHSM54N(BL)-HC / CHSM54N(BLH)-HC (420W class) 420W Solar Panel - Specs & Review | ComparePV" description: "Astronergy CHSM54N(BL)-HC / CHSM54N(BLH)-HC (420W class) 420W solar panel. Specs: 21.50% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm54n-bl-hc-chsm54n-blh-hc-420w-class" updated: 2026-09-11 --- # Astronergy CHSM54N(BL)-HC / CHSM54N(BLH)-HC (420W class) Middle of its segment, modest efficiency 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Astronergy - **Model:** CHSM54N(BL)-HC / CHSM54N(BLH)-HC (420W class) - **Series:** ASTRO N5s (Monofacial) - **Rated power:** 420 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) | 420 W | 435 W | Weak - bottom 16% | | | Module efficiency | 21.50% | 22.00% | Weak - bottom 17% | 7,958 | | Power density | 215.1 | 220.2 | Weak - bottom 19% | 7,882 | | 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 | 21.50% | 22.00% | Weak - bottom 17% | 7,958 | | Power density | 215.1 | 220.2 | Weak - bottom 19% | 7,882 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 50.7 | 51.4 | Typical | 4,124 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **21.50% module efficiency** - Bottom 17% of the TOPCon 400-450 W segment, against a median of 22.00%. - **215.1 watts per square metre** - Bottom 19% of the TOPCon 400-450 W segment, against a median of 220.2. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 420 W - **Efficiency:** 21.50 % - **Voltage at Pmax (Vmp):** 31.93 V - **Current at Pmax (Imp):** 13.15 A - **Open-circuit voltage (Voc):** 38.00 V - **Short-circuit current (Isc):** 13.87 A ### 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:** 215.1 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:** 367 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7958 of 14005 | | Power density | 7882 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 4124 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Confirmed low degradation (TÜV NORD)** - ASTRO N-type TOPCon modules have obtained TÜV NORD certification for LETID resistance and have achieved a first-year degradation of 0.66% (industry average ~1%), with degradation rates of ≤0.4%/year in years 2–30 – which translates to ≥87.4% power output after 30 years. - **Low thermal expansion coefficient of -0.29%/°C** - The value of -0.29°C/°C is significantly better than typical PERC modules (-0.34 to -0.37°C/°C). At an operating temperature of 60°C, this translates to approximately 7W more power compared to a PERC module with the same nominal power – a direct result of the N-type TOPCon technology. - **30-year fixed-term insurance, externally guaranteed** - The power guarantee is insured by an independent international insurer (as confirmed in the datasheets for the N5s series), which protects the investor even in the event of financial difficulties for the manufacturer – a key argument when calculating the ROI of a prosumer or commercial installation. - **BNEF Tier 1, ranking 6th** - Astronergy was ranked in the top 6 of BloombergNEF's 2023 bankability index, which confirms its ability to finance non-recourse projects. The company has been operating since 2006 and is part of the CHINT group – one of the largest energy conglomerates in China, which reduces the risk of non-performance of guarantees. - **Competitive pricing with Tier-1 specifications** - Astronergy is independently rated as a 'budget Tier 1' (A1SolarStore, SolarChoice), and its distribution through Energynat Trade ensures availability on the European market – with performance comparable to similar products (e.g., Lina Energy 22.37%, KDM 22.5%) its price-to-performance ratio is favorable for typical 10–50 kWp installations. ## Cons - **15-year product warranty (compared to 25 years offered by competitors)** - ASTRO N5s offers a 15-year product warranty, while the Luxor Solar ECO LINE N-TYPE in the same segment provides 25 years of performance/efficiency. For commercial installations with the financial institution's requirement for a minimum product warranty period, this could be a limiting factor. - **Performance 0.36 pp below the segment leader** - The maximum efficiency of 22.5% (at 440 Wp) is lower than that of the Luxor Solar ECO LINE N-TYPE NON-REFLECT, which achieves 22.86% at the same power of 440 Wp. On a roof with limited surface area, this difference could mean the need to install an additional module, especially for larger systems. ## About this series Astronergy ASTRO N5s (Monofacial) series was designed to **extract more energy** from the same rooftop surface - without complicating the installation project. At the core of this line are **TOPCon n-type cells**, which help operate more stably under variable conditions and reduce losses when modules heat up during summer. In practice, this translates to more predictable yields and better profitability throughout the installation's entire life cycle. This product stands out among many popular solutions due to its **low power degradation over time** and long linear warranty, which is particularly important for investors looking for returns over a longer horizon. The construction is based on a **half-cut structure** and **Super Multi Busbar (SMBB)** technology, improving performance under partial shading and increasing resistance to micro-cracks that occur during transport or during installation. This is a great choice for residential and small commercial installations where **high power density in a compact format** matters, along with aesthetics (e.g., the full black variant) and compatibility with popular inverters and mounting systems. ## Notable figures - Efficiency of 21.5% matches the \*\*TOPCon 400-450W\*\* median - 215.1 W/m² power density is 5.1 W/m² below \*\*TOPCon 400-450W\*\* median (220.2 W/m²) - requires larger installation area - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 400-450W\*\* panels - #7958 for efficiency, #2165 for temperature performance out of 14005 panels ## Questions ### What warranty coverage applies to Astronergy ASTRO N5s Monofacial panels? The ASTRO N5s series carries a 15-year product warranty covering manufacturing defects and workmanship, alongside a 30-year linear power output warranty. The manufacturer guarantees that after 30 years of operation the panel will retain at least 87.4% of its original rated power. This is one of the longest power warranties in its product class and represents a compelling argument for investors calculating the long-term return on a PV installation. ### What is TOPCon technology and why does the ASTRO N5s series use it? TOPCon (Tunnel Oxide Passivated Contact) is an n-type cell technology that minimizes charge-carrier recombination at the cell surface. In practical terms, this yields higher efficiency than older PERC cells and a lower temperature coefficient of approximately -0.29%/°C, meaning ASTRO N5s modules lose less power output during hot summer days. The N5s series adopts this technology to deliver more consistent energy yields throughout the year. ### Do ASTRO N5s panels perform well under partial shading from a chimney or dormer window? Yes. The half-cut cell architecture (108 cells split in half) combined with Super Multi Busbar (SMBB) technology significantly improves module performance under partial shading conditions. When a portion of the cells is shaded, the remainder of the panel continues to generate power and losses are confined to the shaded section. As a result, the ASTRO N5s performs better on rooftops with chimneys, skylights, or dormers than older full-cell module designs. ### Is the Astronergy ASTRO N5s series available in a full black version? Yes. Within the ASTRO N5s series there is a variant featuring a black frame and black backsheet (full black), designated in the product catalog with the abbreviation BL or BLH. This option is widely chosen for installations on highly visible roof sections where aesthetics are a priority. The full black variant reaches a maximum power output of up to 440 Wp, meaning the visually refined version does not require any compromise on performance. ### Are ASTRO N5s panels suitable for pitched roofs on single-family homes? Yes. The ASTRO N5s series was designed with prosumer installations and small commercial buildings in mind. The module's compact dimensions (approximately 1722 x 1134 mm) and weight below 25 kg simplify transportation and installation on standard pitched roofs. A power output of up to 440 Wp allows a high total system capacity to be achieved on a limited roof area, which is critical when working with smaller roof sections. ### Is Astronergy a reliable manufacturer, and do ASTRO N5s panels hold the relevant certifications? Astronergy is a Tier 1 manufacturer according to the Bloomberg NEF classification, which represents the highest category of financial and manufacturing credibility. The company regularly achieves Top Performer status in independent testing by the PVEL laboratory. ASTRO N5s modules are certified to IEC 61215 and IEC 61730 and comply with the safety standards required in European markets, including Poland. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/426222820661dc5a68df01-8584553d75e9.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Just Solar JST-EDMH-(445-465)W-TD (465W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-465w-class) | 465 W | +45 W, hotter, +2.3 pp | | [Luxor Solar LX-465M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-465m-182r-96-gg) | 465 W | +45 W, cooler, +2.3 pp | | [Maxeon SPR-MAX7-470](https://comparepv.com/panel/maxeon-spr-max7-470) | 470 W | +50 W, +2.2 pp, +10 yr warranty | | [AIKO AIKO-A470-MAH54Mb](https://comparepv.com/panel/aiko-aiko-a470-mah54mb) | 470 W | +50 W, cooler, +2.1 pp | | [AIKO AIKO-A460-MAH54Mb](https://comparepv.com/panel/aiko-shenzhen-aiko-digital-energy-technology-co-ltd-aiko-a460-mah54mb-1) | 460 W | +40 W, +2.1 pp | | [TCL Zhonghuan HSM-BD54-LA470](https://comparepv.com/panel/tcl-zhonghuan-hsm-bd54-la470) | 470 W | +50 W, cooler, +2.1 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 | +0.3 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 | +10 W, +0.5 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +90 W, cooler, +3.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +75 W, cooler, +3.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +85 W, cooler, +3.2 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +70 W, cooler, +3.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +80 W, cooler, +3.0 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +80 W, cooler, +3.0 pp | --- Source: https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm54n-bl-hc-chsm54n-blh-hc-420w-class 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.