SIGNIFICANT ACCOUNTING POLICIES (Tables)

12 Months Ended

Dec. 31, 2018

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of computation of basic and diluted net earnings (loss) per share

The following table presents the computation of basic and diluted net earnings per share attributable to SolarEdge Technologies, Inc. for the periods presented (in thousands, except share and per share data):

	Year ended December 31,				Six months ended December 31,		Year ended June 30,
	2018		2017		2016		2016
Numerator:
Net income	$	128,046	$	84,172	$	25,381	$	76,609
Net loss attributable to Non-controlling interests		787		-		-		-
Net income attributable to SolarEdge Technologies, Inc.	$	128,833	$	84,172	$	25,381	$	76,609
Denominator:
Shares used in computing net earnings per share of common stock, basic		45,235,310		42,209,238		41,026,926		39,987,935
Effect of stock-based awards		2,744,692		3,216,069		2,812,416		4,388,140
Shares used in computing net earnings per share of common stock, diluted		47,980,002		45,425,307		43,839,342		44,376,075

Schedule of Disaggregated by Revenue

Revenue disaggregated by revenue source for the years ended December 31, 2018, 2017, the six months ended December 31, 2016 and the year ended June 30, 2016 consists of the following:

	Year ended December 31,				Six months ended December 31,		Year ended June 30,
	2018		2017		2016		2016
Solar	$	914,285	$	607,045	$	239,997	$	489,843
Non-solar		22,952		-		-		-
Total revenues	$	937,237	$	607,045	$	239,997	$	489,843

Schedule of estimated useful lives of property and equipment

Depreciation is calculated by the straight-line method over the estimated useful lives of the assets, at the following rates:

	%
Buildings and plants	2.5 – 5 (mainly 2.5)
Computers and peripheral equipment	15 – 33 (mainly 33)
Office furniture and equipment	7 – 25 (mainly 7)
Machinery and equipment	7 – 33 (mainly 20)
Laboratory equipment	15 – 25 (mainly 15)
Leasehold improvements	over the shorter of the lease term or useful economic life

Schedule of Impact of Statements of Income, Cash flows, and Balance sheets

In accordance with the new revenue standard requirements, the disclosure of the impact of adoption on the Company’s consolidated statements of operations, cash flows, and balance sheets were as follows:

	Year ended December 31, 2018
	As Reported		Balances before adoption of ASC 606			Effect of change
Statements of operations
Revenues	$	937,237	$	937,168		$	69
Financial expenses (income), net		2,297		(122	)		2,419
Net income		128,046		130,396			(2,350	)
Cash flows
Net income		128,046		130,396			(2,350	)
Changes in assets and liabilities:
Deferred revenues		37,041		34,789			2,252
	As of December 31, 2018
	As Reported		Balances before adoption of ASC 606			Effect of change
Balance Sheets
Deferred Revenues - Current		14,351		14,559			(208	)
Deferred Revenues -  Long term		60,670		54,240			6,430
Retained earnings	$	191,133	$	195,005		$	(3,872	)

Schedule of Balance Sheets Following the Adoption of ASC 606, Revenue

The effect of the changes made to the consolidated January 1, 2018 balance sheets following the adoption of ASC 606, Revenue - Revenue from Contracts with Customers were as follows:

	Balance as of December 31, 2017		Adjustments due following adoption of ASC 606			Balance as of January 1, 2018
Deferred Revenues - Current term	$	2,559	$	(89	)	$	2,470
Deferred Revenues -  Long term		31,453		3,961			35,414
Retained earnings	$	66,172	$	(3,872	)	$	62,300

Employee Stock Option [Member] | Employees and Members of Board of Directors [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of assumptions used to estimate fair value of stock options and warrants

The fair value for options granted to employees and executive directors and Employee Stock Purchase Plan in the years ended December 31, 2018, December 31, 2017, the six months ended December 31, 2016, and the year ended June 30, 2016, are estimated at the date of grant using a Black-Scholes-Merton option-pricing model with the following assumptions:

	Year ended December 31,						Six months ended December 31, 2016			Year Ended June 30, 2016
	2018			2017
Employee Stock Options
Risk-free interest		2.32	%		2.14% - 2.17	%		1.28% - 1.34	%		1.39% - 1.97	%
Dividend yields		0	%		0	%		0	%		0	%
Volatility		56.53	%		58.08% - 58.10	%		55.33% - 55.34	%		55.45%-56.03	%
Expected option term in years		6.06			6.06			6.06			5.50-6.11
Estimated forfeiture rate		0	%		0	%		0	%		10.3	%
Employee Stock Purchase Plan
Risk-free interest		2.10% - 2.52	%		0.60% - 1.07	%		0.60	%		0.40	%
Dividend yields		0	%		0	%		0	%		0	%
Volatility		54.13% - 56.67	%		45.60% - 48.08	%		48.08	%		62.84	%
Expected term	6 months			6 months			6 months			6 months

Employee Stock Option [Member] | Nonemployee Consultants [Member]

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of assumptions used to estimate fair value of stock options and warrants

The following table set forth the parameters used in computation of the options compensation to non-employee consultants in the years ended December 31, 2018,  December 31, 2017, the six months ended December 31, 2016 and the year ended June 30, 2016, using a Black-Scholes-Merton option-pricing model with the following assumptions:

	Year ended December 31, 2018			Year ended December 31, 2017			Six months ended December 31, 2016			Year ended June 30, 2016
Risk-free interest		2.81%-2.84	%		2.12% - 2.42	%		1.16% - 2.45	%		1.15%-2.21	%
Dividend yields		0	%		0	%		0	%		0	%
Volatility		58.18%-59.33	%		61.21% - 62.62	%		55.33% - 58.57	%		55.37%-55.75	%
Contractual life in years		6-10			6-10			6 - 10			6.4-10