The Chinese manufacturer said its new Astro 7 TOPCon module has an innovative self-cleaning frame and an energy conversion efficiency of 23.2%.
Astronergy, the solar module unit of China’s Chint Group, has launched Astro N7, a new series of anti-dust modules aimed at the fast-growing residential and commercial rooftop markets. The design aims to maximize generation efficiency and reduce pollution-related losses.
The Astro N7 CHSM78RN(DG)/F-BH bifacial module is based on n-type TOPCon cell technology and delivers 725–750 W with a maximum efficiency of 23.2% under standard test conditions. The module uses a 210R rectangular wafer rotated 90 degrees, allowing for a revised layout that increases the active area while remaining compatible with mainstream mounting systems and inverters.
A key innovation is the anti-dust frame architecture, which features a shortened lower frame edge to prevent sediment build-up and promote natural, rain-driven cleaning. The manufacturer says this design addresses persistent pollution problems on PV roofs, especially in areas with dust, industrial particles or irregular rainfall.
According to Astronergy, field data from Wuhan shows that the anti-dust design delivers an average monthly energy gain of 2.59%, with peak values of more than 6.6%. For a 10 MW commercial and industrial project, this translates to an additional 150,000 kWh per year, in addition to reduced cleaning requirements.
The module has a 2.0 mm structure with double glass, 156 n-type cells, an aluminum frame and weighs 38.5 kg. The electrical characteristics include an open-circuit voltage of 58.36 V and a short-circuit current of 16.26 A, supported by a temperature coefficient of –0.29%/C. The module is certified for 1,500 V DC systems and has BloombergNEF Tier-1 status.
The warranty terms include a 15-year product warranty and a 30-year linear performance warranty, with degradation limited to 1% in the first year and 0.4% per year thereafter. It is claimed that the module retains at least 87.4% of its initial output after 30 years.
Astronergy positions the 750W anti-dust design as a high-performance option for space-constrained rooftops and commercial locations with high energy costs, where incremental yield gains and lower O&M requirements can significantly improve return on project investment (IRR).
The company said anti-dust Astro N7 modules have entered mass production, with an expected delivery of more than 3 GW by the end of 2025. Annual capacity for the series is expected to exceed 6 GW.
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