DAH vs Longi Solar - solar panel manufacturer comparison

DAH Solar was founded in 2009 in Hefei, China, and has grown into a Tier 1 bankable manufacturer - confirmed on the BloombergNEF Q3 2025 list - with a module production capacity of around 10 GW. Longi Solar, established in 2000 and listed on the Shanghai Stock Exchange, is one of the world's largest PV module producers, commanding approximately 11% of the global market, a production capacity of 85-90 GW per year, and a workforce exceeding 37,000 employees. Both companies are headquartered in China and hold Tier 1 bankable status, but their scale, brand recognition, and financial depth differ substantially, with Longi being a publicly traded industry giant and DAH an agile challenger with a distinctly differentiated product strategy.

DAH Solar's portfolio of 356 modules is dominated by bifacial TOPCon technology - over 81% of the lineup - with 88.8% of panels being bifacial, many in its signature frameless Full-Screen format that reduces soiling and eliminates the dust-trapping aluminium frame lip. Maximum output reaches 725 Wp and the average product warranty stands at approximately 29.5 years, making DAH a strong candidate for utility-scale ground-mount and commercial C&I projects where bifacial energy gain and long warranty terms directly improve LCOE calculations. Longi Solar, by contrast, leads on peak efficiency: its HPBC back-contact N-type modules reach up to 25% panel efficiency and 670 Wp output, with a slightly better average temperature coefficient of -0.291%/°C compared to DAH's -0.298%/°C. The higher average module power of around 543.5 Wp versus DAH's roughly 521.8 Wp makes Longi the preferred choice for space-constrained residential rooftop installations and high-specification commercial projects where efficiency per square metre is the primary constraint.

For buyers prioritising technology leadership, efficiency in area-limited installations, and the security of a globally scaled supply chain, Longi Solar is the stronger overall candidate - particularly for residential rooftop and premium commercial segments. DAH Solar presents a compelling alternative wherever a large bifacial portfolio, frameless module innovation, and a longer average warranty horizon are valued above raw efficiency, especially in utility-scale or C&I ground-mount scenarios where the Full-Screen bifacial lineup can deliver measurable yield advantages at competitive pricing.

Generated by Claude Sonnet · 2026-05-12