LONGi Green Energy has begun mass production of a 21GW ACM (nano-alloy matrix
contact) cell at its Xixian production base. German Hamelin Solar Research
Institute certified cell efficiency at 27.6%, and TÜV Rheinland certified ACM
module power at 672W. Mass-production data show conversion-efficiency gains of
0.2–0.3 percentage points and module power increases of 3–5W; the company
reports gigawatt-scale benchmark production and industry-leading stability and
reliability.
