Solid all-round for its segment
The Astronergy ASTRO N5s (CHSM54N-HC) Monofacial 425-445W series was designed for maximum yield on limited roof surfaces, without complicating the installation project. The use of N-type monocrystalline cells in TOPCon technology ensures stable performance over the long term and reduced sensitivity to typical degradation phenomena, which can lower energy production over subsequent seasons. Thanks to its half-cut construction, the module performs better under real-world conditions-partial shading and uneven irradiance.
This is an excellent solution for investors seeking high energy production on residential, commercial, and public building rooftops, where every square meter counts. The series also features an advanced, modern glass-backsheet structure, simplifying installation and fitting seamlessly with popular roofing systems. In practice, you get a module optimized for high long-term operational efficiency and predictable energy output, setting it apart from many competitive panels based on outdated solutions.
Ranking
Signals from the data
Residential, commercial and shaded-installations.
The maximum efficiency of 22.8% surpasses all comparable products: Q-Cells Q.TRON BLACK (22.3%), Solitek SOLRIF D Satin (22.06%), and SunEvo SE6-46SC EVOX (21.4%). This translates to a significantly higher energy yield from a limited roof area – the advantage over SunEvo is more than 1.4 percentage points.
The Pmax coefficient at -0.29%/°C is better than typical PERC modules (-0.35%/°C), resulting in lower production losses on hot days – a difference of 6-10% in losses for every 10°C above STC. This is particularly significant in Poland's climate during the summer months.
N-type TOPCon cells exhibit an annual degradation of ≤0.4% (over 2-30 years), compared to ≤1.0% in the first year, guaranteeing ≥87.4% of their nominal power after 30 years. PERC modules typically degrade by 0.45-0.55%/year, which results in a real difference of 2-4% after 30 years.
A 30-year linear warranty on power output (≥87.4% after 30 years) is one of the longest industry standards in the residential segment. Furthermore, the warranty is insured by an external, international insurance company, which minimizes the risk of it being lost in the event of financial difficulties for the manufacturer.
Astronergy maintains a Tier 1 BNEF bankability rating and ranked in the top 6 global module manufacturers in the 2023 BloombergNEF ranking. With a production capacity of 56 GW (by Q2 2025), the company ensures stable supply and long-term service support.
The product warranty is 15 years, while the direct competitor, Q-Cells Q.TRON BLACK, typically offers a standard 25-year product warranty. In the event of a mechanical failure of the module after 15 years of operation, the investor is responsible for the full cost of replacement.
- Efficiency of 21.8% matches the TOPCon 400-450W median
- At 217.6 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
- In the top 50% for efficiency among all TOPCon panels
Specifications
Datasheet charts
Measured curves published by Astronergy in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 425 Wp appear here. The rest cover the whole series.
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
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