BASIC AND DILUTED NET EARNINGS PER SHARE (Schedule of Computation of Basic and Diluted Net Earnings (Loss) Per Share) (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Numerator:
Net income	$ 32,913		$ 34,568		$ 50,888	$ 70,254
Net loss attributable to Non-controlling interests	215				1,256
Net income attributable to SolarEdge Technologies, Inc.	$ 33,128	$ 19,016	$ 34,568	$ 35,686	$ 52,144	$ 70,254
Denominator:
Shares used in computing net earnings per share of common stock, basic	47,683,799		45,216,253		47,353,401	44,726,382
Numerator:
Net income	$ 32,913		$ 34,568		$ 50,888	$ 70,254
Net loss attributable to Non-controlling interests	215				1,256
Undistributed earnings reallocated to non-vested stockholders	(220)				(304)
Net income attributable to SolarEdge Technologies, Inc.	$ 32,908		$ 34,568		$ 51,840	$ 70,254
Denominator:
Shares used in computing net earnings per share of common stock, basic	47,683,799		45,216,253		47,353,401	44,726,382
Weighted average effect of dilutive securities:
Non-vested PSU'S	(334,096)				(289,796)
Effect of stock-based awards	2,590,331		3,075,027		2,294,675	3,258,435
Shares used in computing net earnings per share of common stock, diluted	49,940,034		48,291,280		49,358,280	47,984,817