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SUMMARY OF PRINCIPAL ACCOUNTING POLICIES - Electricity revenue (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disaggregation of Revenue [Line Items]      
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration] Other Operating Income (Expense), Net Other Operating Income (Expense), Net Other Operating Income (Expense), Net
Net revenues $ 7,468,610 $ 5,277,169 $ 3,476,495
Electricity      
Disaggregation of Revenue [Line Items]      
Total net revenues 23,835 29,420 9,706
Operating lease income 4,736 4,940 2,457
Net revenues 19,099 24,480 7,249
CSI Solar Segment | Electricity      
Disaggregation of Revenue [Line Items]      
Total net revenues 2,256 15,302 9,077
Global Energy Segment | Electricity      
Disaggregation of Revenue [Line Items]      
Total net revenues $ 21,579 $ 14,118 $ 629