FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * Weber John Howard   2. Issuer Name and Ticker or Trading Symbol Enphase Energy, Inc. [ENPH] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) C/O ENPHASE ENERGY, INC., 1420 NORTH MCDOWELL BLVD 3. Date of Earliest Transaction (Month/Day/Year) 03/06/2018 (Street) PETALUMA, CA 94954 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/06/2018   M   27,763 A $ 0.7 27,763 D   Common Stock 03/06/2018   S   27,763 D $ 3.8752 0 (1) D   Common Stock 03/06/2018   M   49,788 A $ 2.58 49,788 D   Common Stock 03/06/2018   S   49,788 D $ 3.8752 0 (1) D

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Option (right to buy) (2)

$ 0.7

03/06/2018

M

27,763

(3)

05/17/2024

Common Stock

27,763

$ 0

106,564

D

Stock Option (Right to Buy) (2)

$ 2.58

03/06/2018

M

49,788

(3)

04/27/2023

Common Stock

49,788

$ 0

56,776 (4)

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Weber John Howard C/O ENPHASE ENERGY, INC. 1420 NORTH MCDOWELL BLVD PETALUMA, CA 94954	X

Signatures

/s/ Denis Quinlan, Attorney-in-Fact for John Howard Weber		03/07/2018
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	The price reported in column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $3.75 to $3.98.
(2)	Issued pursuant to the 2011 Equity Incentive Plan.
(3)	Such option will vest in 12 equal monthly installments from the grant date, such that the option is fully vested on the one-year anniversary of the date of grant, subject to the Director's Continuous Service (as defined in the 2011 Equity Incentive Plan).
(4)	Remaining options in Table II, column 9 are are vested and unvested options from other grants. All vested options from this grant have been exercised.

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