The number of interests in solar power plants sold during the year.

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Represents the percentage of units purchased.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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RELATED PARTY BALANCES AND TRANSACTIONS (Details) ¥ in Thousands, R$ in Thousands, R in Thousands	6 Months Ended		11 Months Ended		12 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2020 CNY (¥)	Nov. 30, 2020 USD ($)	Nov. 30, 2020 CNY (¥)	Dec. 31, 2021 USD ($) item shares	Dec. 31, 2021 CNY (¥) item shares	Dec. 31, 2021 JPY (¥) item shares	Dec. 31, 2020 USD ($) item shares	Dec. 31, 2020 CNY (¥) item shares	Dec. 31, 2020 JPY (¥) item shares	Dec. 31, 2020 BRL (R$) item shares	Dec. 31, 2019 USD ($) item shares	Dec. 31, 2019 CNY (¥) item shares	Dec. 31, 2019 JPY (¥) item shares	Dec. 31, 2019 ZAR (R) item shares	Dec. 31, 2018	Dec. 31, 2021 CNY (¥)	Sep. 30, 2021	Dec. 31, 2020 CNY (¥)	Dec. 31, 2019 CNY (¥)
RELATED PARTY BALANCES AND TRANSACTIONS
Amount due from related party					$ 73,042,000			$ 5,834,000
Trade receivable from affiliate					5,517,000
Amounts due to subsidiaries, net					$ 143,000			$ 314,000
RE Crimson Holdings LLC
RELATED PARTY BALANCES AND TRANSACTIONS
Equity Method Investment, Ownership Percentage																		20.00%
RSUs
RELATED PARTY BALANCES AND TRANSACTIONS
Granted (in shares) \| shares					2,161,098	2,161,098	2,161,098	1,105,640	1,105,640	1,105,640	1,105,640	706,637	706,637	706,637	706,637
Horus and Recursos
RELATED PARTY BALANCES AND TRANSACTIONS
Amount due from related party					$ 73,042,000
Various affiliates
RELATED PARTY BALANCES AND TRANSACTIONS
Equity Method Investment, Ownership Percentage					20.00%												20.00%
Salgueiro I Renewable Energy S.A
RELATED PARTY BALANCES AND TRANSACTIONS
Amount due from related party					$ 2,580,000
Equity Method Investment, Ownership Percentage					20.00%												20.00%
Revenue from sale of solar products					$ 105,000			$ 11,636,000
Percentage of ownership after sale transaction					20.00%	20.00%	20.00%
Salgueiro II Renewable Energy S.A.
RELATED PARTY BALANCES AND TRANSACTIONS
Amount due from related party					$ 266,000
Equity Method Investment, Ownership Percentage					20.00%												20.00%
Revenue from sale of solar products					$ 105,000			9,996,000
Percentage of ownership after sale transaction					20.00%	20.00%	20.00%
Jaba 4 Energias Renovveis S.A.
RELATED PARTY BALANCES AND TRANSACTIONS
Revenue from sale of solar products					$ 3,210,000			3,696,000
Percentage of ownership after sale transaction					20.00%	20.00%	20.00%
Salgueiro III Renewable Energy S.A.
RELATED PARTY BALANCES AND TRANSACTIONS
Revenue from sale of solar products					$ 114,000			9,403,000
Percentage of ownership after sale transaction					20.00%	20.00%	20.00%
Jaiba 3 Renewable Energy S.A.
RELATED PARTY BALANCES AND TRANSACTIONS
Revenue from sale of solar products					$ 834,000			5,971,000
Percentage of ownership after sale transaction					20.00%	20.00%	20.00%
Jaiba 9 Renewable Energy S.A.
RELATED PARTY BALANCES AND TRANSACTIONS
Revenue from sale of solar products					$ 3,046,000			$ 1,372,000
Percentage of ownership after sale transaction					20.00%	20.00%	20.00%
ET Solutions South Africa 1 Pty
RELATED PARTY BALANCES AND TRANSACTIONS
Revenue from sale of solar products												$ 40,970,000			R 586,832
Percentage of ownership after sale transaction												49.00%	49.00%	49.00%	49.00%
Canadian Solar Infrastructure Fund, Inc
RELATED PARTY BALANCES AND TRANSACTIONS
Number of solar power plants sold \| item					2	2	2	2	2	2	2	3	3	3	3
Percent of units purchased								14.64%	14.64%	14.64%	14.64%	14.64%	14.64%	14.64%	14.64%
Canadian Solar Infrastructure Fund, Inc \| Asset management service
RELATED PARTY BALANCES AND TRANSACTIONS
Revenue from providing development services					$ 7,541,000		¥ 829,053	$ 3,723,000		¥ 394,506				¥ 281,094
Canadian Solar Infrastructure Fund, Inc \| O & M Service
RELATED PARTY BALANCES AND TRANSACTIONS
Revenue from providing development services					9,195,000		981,161	7,564,000		805,021		$ 2,052,000		223,598
Canadian Solar Infrastructure Fund, Inc \| Revenue
RELATED PARTY BALANCES AND TRANSACTIONS
Revenue from sale of solar products					282,133,000		¥ 30,601,181	$ 8,392,000		¥ 888,000		53,874,000		¥ 5,889,000
Revenue from providing development services												$ 2,573
Suzhou iSilver Materials Co
RELATED PARTY BALANCES AND TRANSACTIONS
Percent of units purchased												14.63%	14.63%	14.63%	14.63%
Purchase from related party			$ 24,301,000	¥ 168,032,000								$ 50,359,000	¥ 350,590,000
Suzhou Kzone Equipment Technology Co., Ltd
RELATED PARTY BALANCES AND TRANSACTIONS
Percent of units purchased												32.00%	32.00%	32.00%	32.00%	32.00%
Purchase from related party	$ 1,048,000	¥ 7,381,000										$ 8,787,000	¥ 61,174,000
Dr. Shawn Qu \| RSUs
RELATED PARTY BALANCES AND TRANSACTIONS
Granted (in shares) \| shares								26,073	26,073	26,073	26,073	26,691	26,691	26,691	26,691
Dr. Shawn Qu \| Chinese Commercial Banks
RELATED PARTY BALANCES AND TRANSACTIONS
Maximum borrowing capacity					1,882,000			$ 20,648,000				$ 203,549,000					¥ 12,000		¥ 135,000,000	¥ 1,420,000
Amounts drawn down					$ 0			$ 0				$ 82,937,000
Luoyang Jiwa New Material Technology Co., Ltd [Member]
RELATED PARTY BALANCES AND TRANSACTIONS
Percent of units purchased					20.00%	20.00%	20.00%	20.00%	20.00%	20.00%	20.00%	20.00%	20.00%	20.00%	20.00%
Purchase from related party					$ 2,995,000	¥ 19,378,000		$ 4,545,000	¥ 31,388,000			$ 2,584,000	¥ 18,124,000
Lavras Solar Holding S.A
RELATED PARTY BALANCES AND TRANSACTIONS
Equity Method Investment, Ownership Percentage								20.00%											20.00%
Purchase cost incurred from related party								$ 974,000			R$ 5,061
Horus Solar S.A. De Capital Variable
RELATED PARTY BALANCES AND TRANSACTIONS
Shareholder loans due from related parties					46,672,000
Recourses Solares PV De Mexico II S.A. De Capital Variable
RELATED PARTY BALANCES AND TRANSACTIONS
Shareholder loans due from related parties					20,712,000
Francisco SA I Renewable Energy S.A.
RELATED PARTY BALANCES AND TRANSACTIONS
Amount due from related party					$ 1,676,000
Equity Method Investment, Ownership Percentage					20.00%												20.00%
Revenue from sale of solar products					$ 7,170,000
Percentage of ownership after sale transaction					20.00%	20.00%	20.00%
Francisco SA II Renewable Energy S.A.
RELATED PARTY BALANCES AND TRANSACTIONS
Amount due from related party					$ 530,000
Equity Method Investment, Ownership Percentage					20.00%												20.00%
Revenue from sale of solar products					$ 7,592,000
Percentage of ownership after sale transaction					20.00%	20.00%	20.00%
Francisco SA III Renewable Energy S.A.
RELATED PARTY BALANCES AND TRANSACTIONS
Revenue from sale of solar products					$ 8,121,000
Percentage of ownership after sale transaction					20.00%	20.00%	20.00%
Lavras I Solar Renewable Energy S.A.
RELATED PARTY BALANCES AND TRANSACTIONS
Revenue from sale of solar products					$ 5,707,000
Percentage of ownership after sale transaction								20.00%	20.00%	20.00%	20.00%
Lavras II Solar Renewable Energy S.A.
RELATED PARTY BALANCES AND TRANSACTIONS
Revenue from sale of solar products					5,842,000
Percentage of ownership after sale transaction								20.00%	20.00%	20.00%	20.00%
Lavras III Solar Renewable Energy S.A.
RELATED PARTY BALANCES AND TRANSACTIONS
Revenue from sale of solar products					6,049,000
Percentage of ownership after sale transaction								20.00%	20.00%	20.00%	20.00%
Lavras IV Solar Renewable Energy S.A.
RELATED PARTY BALANCES AND TRANSACTIONS
Revenue from sale of solar products					$ 6,233,000
Percentage of ownership after sale transaction					20.00%	20.00%	20.00%
Lavras V Solar Renewable Energy S.A.
RELATED PARTY BALANCES AND TRANSACTIONS
Revenue from sale of solar products					$ 6,233,000
Percentage of ownership after sale transaction					20.00%	20.00%	20.00%
Sonoran West Solar Holdings, LLC
RELATED PARTY BALANCES AND TRANSACTIONS
Revenue from sale of solar products					$ 12,822,000
Percentage of ownership after sale transaction					20.00%	20.00%	20.00%
Sonoran West Solar Holdings 2, LLC
RELATED PARTY BALANCES AND TRANSACTIONS
Percentage of ownership after sale transaction					20.00%	20.00%	20.00%
Sonoran West Solar Holdings 2, LLC \| RE Crimson Holdings LLC
RELATED PARTY BALANCES AND TRANSACTIONS
Revenue from sale of solar products					$ 6,955,000
Yancheng Jiwa New Material Technology Co., Ltd
RELATED PARTY BALANCES AND TRANSACTIONS
Percent of units purchased					20.00%	20.00%	20.00%
Purchase from related party					$ 1,688,000	¥ 10,831,000