DAH vs Tongwei - solar panel manufacturer comparison

DAH Solar is a Chinese manufacturer headquartered in Hefei, Anhui province, and has built a more modest but still Tier 1-certified footprint, appearing on BloombergNEF's Tier 1 module manufacturer list in Q1 2025 and prior quarters. Its scale is comparatively small, with company representatives citing around 10 GW of module capacity, 5 GW of cell capacity, and 2 GW of wafer capacity as of late 2025, alongside notable shipment volumes into markets like Brazil. Tongwei, also Chinese-headquartered, operates at a dramatically larger scale: it has likewise held BloombergNEF Tier 1 status through 2025, but with module manufacturing capacity reported in the tens of gigawatts (figures in the 85 to 90 GW per year range appear in trade press) and N-type cell capacity cited even higher, placing it consistently in the global top five for module shipments according to InfoLink rankings. Tongwei clearly carries the stronger institutional footprint, combining vertically integrated polysilicon-to-module production with far greater bankability scale, while DAH operates as a smaller, more specialized Tier 1 player.

Both companies center their current product lines on TOPCon cell technology. DAH's flagship offerings include frameless, double-glass TOPCon modules (its DHN-72X16/DG/FS series) rated around 570 to 585 W at roughly 22 to 22.65 percent efficiency, along with a newer Full-Screen dense-busbar line, generally positioned for commercial and utility rooftop or ground-mount installations where aesthetics and snow/sand-shedding frameless design are emphasized. Tongwei's comparable line is its TNC 2.0 series, launched in 2025, which combines several in-house technologies (0BB busbar design, stencil printing, polymer-based cell treatments) to reach claimed outputs up to 765 W and efficiencies near 24.6 to 24.8 percent with bifaciality above 88 percent, aimed at both utility-scale and distributed generation projects across more than 70 countries. Tongwei has also pointed to Kiwa PVEL reliability recognition, though that framing originates from company communications rather than an independently published scorecard.

For a typical buyer in 2025, Tongwei is the more conservative default given its larger production scale, broader global distribution, and longer track record of shipment volume, which generally translates into stronger supply security and bankability for large commercial or utility projects. DAH remains a credible Tier 1 alternative, particularly for buyers prioritizing specific niche product designs like frameless aesthetics, but its smaller scale means supply depth and long-term track record are less proven than Tongwei's. Neither claim should be taken as independently lab-verified, since most efficiency and reliability figures originate from manufacturer or trade-press sources rather than third-party test labs.

Generated by Claude Sonnet 5 · 2026-10-21