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RELATED PARTY BALANCES AND TRANSACTIONS (Details) ¥ in Thousands, ¥ in Thousands | 12 Months Ended |  |
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Dec. 31, 2023 USD ($) item shares | Dec. 31, 2023 CNY (¥) item shares | Dec. 31, 2023 JPY (¥) item shares | Dec. 31, 2022 USD ($) shares | Dec. 31, 2022 CNY (¥) shares | Dec. 31, 2022 JPY (¥) shares | Dec. 31, 2021 USD ($) item shares | Dec. 31, 2021 CNY (¥) item shares | Dec. 31, 2021 JPY (¥) item shares | Dec. 31, 2021 CNY (¥) | Sep. 30, 2021
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Amount due from related parties, Non current | $ 32,313,000 |  |  | $ 33,489,000 |  |  |  |  |  |  |
Other Receivable, after Allowance for Credit Loss, Noncurrent, Related Party, Type [Extensible Enumeration] | srt:AffiliatedEntityMember |  |  | srt:AffiliatedEntityMember |  |  |  |  |  |  |
Horus and Recursos |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Ownership percentage | 49.00% |  |  | 49.00% |  |  |  |  |  |  |
Crimson |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Ownership percentage | 20.00% |  |  | 20.00% |  |  |  |  |  |  | 20.00%
RSUs |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Granted (in shares) | shares | 206,067 | 206,067 | 206,067 | 444,167 | 444,167 | 444,167 | 2,161,098 | 2,161,098 | 2,161,098 |  |
Canadian Solar Infrastructure Fund, Inc |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Number of solar power plants sold | item | 1 | 1 | 1 |  |  |  | 2 | 2 | 2 |  |
Revenues | $ 1,591,000 |  | ¥ 230,144 |  |  |  | $ 282,133,000 |  | ¥ 30,601,181 |  |
Canadian Solar Infrastructure Fund, Inc | Asset management service |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Revenue from providing development services | 10,004,000 |  | 1,405,513 |  |  |  |  |  |  |  |
Canadian Solar Infrastructure Fund, Inc | O & M Service |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Revenue from providing development services | 6,974,000 |  | ¥ 984,527 |  |  |  |  |  |  |  |
Related party |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Amount due from related parties, current | 40,582,000 |  |  | $ 48,614,000 |  |  |  |  |  |  |
Other current liabilities | $ 511,000 |  |  | $ 89,000 |  |  |  |  |  |  |
Related party | Canadian Solar Inc | Chinese investor |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest ownership percentage | 70.00% |  |  | 80.00% |  |  | 80.00% |  |  | 80.00% |
Related party | Canadian Solar Inc | Canadian infrastructure fund |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest ownership percentage | 80.00% |  |  | 80.00% |  |  | 80.00% |  |  | 80.00% |
Related party | Canadian Solar Inc | Brazilian Investor |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest ownership percentage | 80.00% |  |  |  |  |  |  |  |  |  |
Related party | Canadian Solar Infrastructure Fund, Inc |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Equity method investee percentage | 14.54% |  |  |  |  |  |  |  |  |  |
Related party | Canadian Solar Infrastructure Fund, Inc | Asset management service |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Revenue from providing development services |  |  |  | $ 4,180,000 |  | ¥ 545,131 | $ 7,541,000 |  | 829,053 |  |
Related party | Canadian Solar Infrastructure Fund, Inc | O & M Service |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Revenue from providing development services |  |  |  | 7,036,000 |  | ¥ 914,933 | 9,195,000 |  | ¥ 981,161 |  |
Related party | Dr. Shawn Qu | Chinese Commercial Banks |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 1,882,000 |  |  | ¥ 12,000 |
Related party | Luoyang Jiwa New Material Technology Co., Ltd [Member] |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Percent of units purchased |  |  |  |  |  |  | 10.91% | 10.91% | 10.91% |  |
Purchase from related party |  |  |  |  |  |  | $ 2,995,000 | ¥ 19,378 |  |  |
Related party | Luoyang Jiwa New Material Technology Co., Ltd [Member] | Canadian Solar Inc | Chinese investor |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest ownership percentage |  |  |  |  |  |  | 89.09% |  |  | 89.09% |
Related party | Horus Solar S.A. De Capital Variable |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Shareholder loans due from related parties | $ 33,664 |  |  | 52,424,000 |  |  |  |  |  |  |
Related party | Recourses Solares PV De Mexico II S.A. De Capital Variable |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Shareholder loans due from related parties | $ 36,832,000 |  |  | $ 29,613,000 |  |  |  |  |  |  |
Related party | Francisco SA I Renewable Energy S.A. |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  | $ 7,090,000 |  |  |  |
Related party | Yancheng Jiwa New Material Technology Co., Ltd |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Percent of units purchased | 10.91% | 10.91% | 10.91% | 10.91% | 10.91% | 10.91% | 10.91% | 10.91% | 10.91% |  |
Purchase from related party | $ 8,300,000 | ¥ 58,869 |  | $ 5,192,000 | ¥ 34,772 |  | $ 1,688,000 | ¥ 10,831 |  |  |
Related party | Yancheng Jiwa New Material Technology Co., Ltd | Canadian Solar Inc | Canadian infrastructure fund |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Noncontrolling interest ownership percentage | 89.09% |  |  | 89.09% |  |  | 89.09% |  |  | 89.09% |
Related party | Marangatu |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 100,939,000 |  |  |  |  |  |  |  |  |  |
Percentage of ownership after sale transaction | 30.00% | 30.00% | 30.00% |  |  |  |  |  |  |  |
Related party | Panati |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 67,463,000 |  |  |  |  |  |  |  |  |  |
Percentage of ownership after sale transaction | 30.00% | 30.00% | 30.00% |  |  |  |  |  |  |  |
Related party | Crimson |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 17,182,000 |  |  | $ 367,383,000 |  |  | $ 19,777,000 |  |  |  |
Percentage of ownership after sale transaction | 20.00% | 20.00% | 20.00% | 20.00% | 20.00% | 20.00% | 20.00% | 20.00% | 20.00% |  |
Related party | Salgueiro |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  | $ 357,000 |  |  | $ 324,000 |  |  |  |
Percentage of ownership after sale transaction |  |  |  | 20.00% | 20.00% | 20.00% | 20.00% | 20.00% | 20.00% |  |
Related party | Francisco |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  | $ 642,000 |  |  | $ 24,883,000 |  |  |  |
Percentage of ownership after sale transaction |  |  |  | 20.00% | 20.00% | 20.00% | 20.00% | 20.00% | 20.00% |  |
Related party | Lavras |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Purchase from related party |  |  |  | $ 202,000 |  |  | $ 30,064,000 |  |  |  |
Percentage of ownership after sale transaction |  |  |  | 20.00% | 20.00% | 20.00% | 20.00% | 20.00% | 20.00% |  |
Related party | Jaiba |  |  |  |  |  |  |  |  |  |  |
RELATED PARTY BALANCES AND TRANSACTIONS |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  | $ 7,090,000 |  |  |  |
Percentage of ownership after sale transaction |  |  |  |  |  |  | 20.00% | 20.00% | 20.00% |  |

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