EXHIBIT 1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, each of the persons named below agrees to the joint filing of a Statement on Schedule 13D (including amendments thereto) with respect to the Ordinary Shares, par value US $0.0001 per share, of Solarfun Power Holdings Co., Ltd.,, and further agrees that this Joint Filing Agreement be included as an exhibit to such filings, provided that, as contemplated by Section 13d-1(k)(ii), no person shall be responsible for the completeness or accuracy of the information concerning the other persons making the filing, unless such person knows or has reason to believe that such information is inaccurate. This Joint Filing Agreement may be executed in any number of counterparts, all of which together shall constitute one and the same instrument.

Dated: February 8, 2008

GOOD ENERGIES II LP acting by its General Partner
GOOD ENERGIES GENERAL PARTNER JERSEY LIMITED
		by:		/s/ Fintan Kennedy		/s/ John Hammill
				Name: Fintan Kennedy		Name: John Hammill
				Title: Director		Title: Director
COFRA JERSEY LIMITED
		by:		/s/ Fintan Kennedy		/s/ John Hammill
				Name: Fintan Kennedy		Name: John Hammill
				Title: Director		Title: Director
GOOD ENERGIES INC
		by:		/s/ Michelle Riley
				Name: Michelle Riley
				Title: Director, Vice
				President and Secretary
GOOD ENERGIES (UK) LLP acting by its managing member
GOOD ENERGIES INVESTMENTS LIMITED
		by:		/s/ Andrew Lee		/s/ Farida Ankim
				Name: Andrew Lee		Name: Farida Ankim
				Title: Director		Title: Secretary
GOOD ENERGIES AG
		by:		/s/ Marcel Brenninkmeijer
				Name: Marcel Brenninkmeijer
				Title: Director
GOOD ENERGIES INVESTMENTS (JERSEY) LIMITED
		by:		/s/ Fintan Kennedy		/s/ John Hammill
				Name: Fintan Kennedy		Name: John Hammill
				Title: Director		Title: Director

COFRA HOLDING AG
		by:		/s/ Andrew Vellani		/s/ Rob Smeele
				Name: Andrew Vellani		Name: Rob Smeele
				Title: Director		Title: Authorized Signatory
FIDARC SARL
		by:		/s/ Michel de Groote		/s/ Raf Bogaerts
				Name: Michel de Groote		Name: Raf Bogaerts
				Title: Manager		Title: Manager
GOOD ENERGIES HOLDING LIMITED
		by:		/s/ A.B.S. Garden
				Name: A.B.S. Garden
				Title: Director
THE BANBURY SETTLEMENT THROUGH FIRCROFT LIMITED AS TRUSTEE
		by:		/s/ Louise Adams
				Name: Louise Adams
				Title: Director
GOOD ENERGIES INVESTMENTS HOLDINGS LIMITED
		by:		/s/ John Hammill		/s/ Paul Andrew Bradshaw
				Name: John Hammill		Name: Paul Andrew Bradshaw
				Title: Director		Title: Director