TECHNOLOGY CO-OPERATION AGREEMENT BY AND BETWEEN RENEWABLE ENERGY COOPERATION AND EVERGREEN SOLAR, INC.

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                                                                   Exhibit 10.19

CONFIDENTIAL TREATMENT REQUESTED: Certain portions of this document have been
omitted pursuant to a request for confidential treatment and, where applicable,
have been marked with an asterisk ("[****]") to denote where omissions have been
made. The confidential material has been filed separately with the Securities
and Exchange Commission.


                             TECHNOLOGY CO-OPERATION

                                     AGREEMENT

                                 BY AND BETWEEN

                          RENEWABLE ENERGY COOPERATION

                                       AND

                              EVERGREEN SOLAR, INC.

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                                 TABLE OF CONTENTS

<TABLE>
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1.    DEFINITIONS.........................................................      1
     1.1    "CAST"........................................................      1
     1.2    "CELL"........................................................      1
     1.3    "DEVELOPED TECHNOLOGY"........................................      2
     1.4    "DEVELOPMENT SERVICES"........................................      2
     1.5    "DIRECT PRODUCTION COSTS".....................................      2
      1.6    "EFFECTIVE DATE"..............................................      2
     1.7    "GOVERNMENTAL AUTHORITY"......................................      2
     1.8    "INITIAL PERIOD"..............................................      2
     1.9    "INTELLECTUAL PROPERTY RIGHTS"................................      2
     1.10   "JOINT INVENTION".............................................      2
     1.11   "LICENSED PRODUCTS"...........................................      2
     1.12   "LICENSABLE"..................................................      2
     1.13   [****]........................................................      2
     1.14   "MATERIAL IP".................................................      2
     1.15   "MODULE"......................................................      3
     1.16   "POST TERMINATION PERIOD".....................................      3
     1.17   "STRING RIBBON"...............................................      3
     1.18   "TECHNOLOGY"..................................................      3
     1.19   "TERMINATION DATE"............................................      3
     1.20   "WAFER".......................................................      3

2.    JOINT DEVELOPMENT...................................................      3
     2.1    IN GENERAL....................................................      3
     2.2    INITIAL ASSISTANCE............................................      3
     2.3    ONGOING TECHNICAL ASSISTANCE AND CONSULTING...................      3
     2.4    ACCESS TO REC RESOURCES.......................................      4
     2.5    ASSIGNMENT OF PERSONNEL.......................................      4
     2.6    COMPLIANCE WITH RULES.........................................      4
     2.7    MATERIAL IP...................................................      4

3.    ACCESS TO EVERGREEN TECHNOLOGY......................................      4

4.    PAYMENTS............................................................      5
     4.1    [****]........................................................      5
     4.2    SCHEDULE OF COSTS.............................................      5
     4.3    ROYALTY ON MATERIAL IP........................................      5
     4.4    ROYALTY EVALUATION BY EXPERTS.................................      7
     4.5    TAX AUTHORITY CHALLENGES......................................      7
     4.6    ROYALTY ON REFUNDS............................................      7
     4.7    ROYALTY PAYMENT...............................................      7
     4.8    CURRENCY......................................................      7
     4.9    AUDIT.........................................................      7
     4.10   PROSPECTIVE BASIS.............................................      8
     4.11   WAIVER........................................................      8
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                                TABLE OF CONTENTS
                                  (CONTINUED)

<TABLE>
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5.    OWNERSHIP RIGHTS AND LICENSES.......................................      8
     5.1    INTELLECTUAL PROPERTY RIGHTS IN DEVELOPED TECHNOLOGY..........      8
     5.2    EXPLOITATION OF JOINT INVENTIONS..............................      8
     5.3    PATENT PROSECUTION............................................      8
     5.4    ENFORCEMENT OF JOINT INVENTIONS...............................      8
     5.5    FURTHER ASSURANCES............................................      9
     5.6    BACKGROUND LICENSE............................................      9

6.    TERM AND TERMINATION................................................      9
     6.1    TERM..........................................................      9
     6.2    TERMINATION FOR CAUSE.........................................      9
     6.3    SPECIAL TERMINATION RIGHT.....................................      9
     6.4    SURVIVAL......................................................      9

7.    CONFIDENTIALITY.....................................................     10
     7.1    DEFINITION....................................................     10
     7.2    CONFIDENTIAL INFORMATION AND EXCLUSIONS.......................     10
     7.3    CONFIDENTIALITY OBLIGATION....................................     10
     7.4    LEGAL DISCLOSURE..............................................     10
     7.5    REMEDIES......................................................     10

8.    REPRESENTATIONS AND WARRANTIES......................................     10
     8.1    AUTHORITY.....................................................     10
     8.2    STANDARD OF PERFORMANCE.......................................     10
     8.3    NON-INFRINGEMENT..............................................     11
     8.4    DISCLAIMER....................................................     11

9.    INDEMNIFICATION.....................................................     11
     9.1    INDEMNITY.....................................................     11

10.   LIMITATION OF LIABILITY.............................................     11

11.   GENERAL PROVISIONS..................................................     11
     11.1   NOTICES.......................................................     11
     11.2   LANGUAGE......................................................     12
     11.3   AMENDMENTS AND WAIVERS........................................     12
     11.4   ASSIGNMENT....................................................     12
     11.5   ENTIRE AGREEMENT; SEVERABILITY................................     12
     11.6   OTHER REMEDIES................................................     12
     11.7   GOVERNING LAW AND DISPUTE RESOLUTION..........................     13
     11.8   COMPLIANCE WITH LAWS AND REGULATIONS..........................     13
     11.9   EXPORT........................................................     13
     11.10 FORCE MAJEURE.................................................     13
     11.11 INDEPENDENT CONTRACTORS.......................................     13
     11.12 THIRD PARTY BENEFICIARIES.....................................     13
     11.13 COUNTERPARTS..................................................     13
     11.14 VALIDITY......................................................     13
</TABLE>


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                         TECHNOLOGY COOPERATION AGREEMENT

     This Technology Cooperation Agreement ("AGREEMENT") is made and entered
into as of the 24th day of November, 2005 ("EFFECTIVE DATE") by and between
Renewable Energy Corporation, a stock corporation organized under the laws of
Norway with its principal executive offices located at Veritasveien 14, N-1323
Hovik, Norway ("REC") and Evergreen Solar, Inc., a Delaware corporation with its
principal executive offices located at 138 Bartlett Street, Marlboro,
Massachusetts, USA, ("EVERGREEN").

     WHEREAS, Evergreen and Q-Cells AG ("Q-CELLS") have previously entered into
a master joint venture agreement (such agreement, including, amendment thereof
"MASTER AGREEMENT") pertaining to the formation of EverQ GmbH ("EVERQ");

     WHEREAS, The purpose of EverQ is to manufacture string ribbon wafers,
photovoltaic cells and modules incorporating such wafers based on a combination
of the parties' respective technologies;

     WHEREAS, REC is one of the world's largest suppliers of high quality solar
silicon and silicon wafers for photovoltaic applications;

     WHEREAS, Evergreen, Q-Cells and REC have determined to amend the Master
Agreement to enable REC to become a shareholder of EverQ;

     WHEREAS, concurrently with the aforementioned amendment to the Master
Agreement, REC and EverQ are entering a License & Technology Transfer Agreement
("REC EVERQ LICENSE");

     WHEREAS, In conjunction with the inclusion of REC in EverQ, the parties
believe it to be in their collective best interest for Evergreen and REC to
collaborate with respect to certain technology sharing, which collaboration
shall be determined based on common agreement among Evergreen and REC; and

     WHEREAS, Evergreen and REC wish to provide for a framework under which they
can mutually determine and establish the desired collaboration;

     NOW, THEREFORE, in consideration of the foregoing premises and the
representations, warranties, covenants and agreements herein contained, and
other good and valuable consideration, the receipt and sufficiency of which are
hereby acknowledged and accepted, and intending to be legally bound hereby, the
parties hereto hereby agree as follows:

     1. DEFINITIONS

          1.1 "CAST" means [****].

          1.2 "CELL" means a crystalline silicon material substrate that has
been processed to provide electrical output from incident sunlight.


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          1.3 "DEVELOPED TECHNOLOGY" means any Technology developed, discovered,
created or invented in connection with or resulting from the performance of the
Development Services.

          1.4 "DEVELOPMENT SERVICES" is defined in Section 2.1.

          1.5 "DIRECT PRODUCTION COSTS" means all direct labor, direct and
consumable materials required for the production of a Licensed Product, and
amortized equipment costs associated with manufacturing a Licensed Product
incorporating Material IP.

          1.6 "EFFECTIVE DATE" means [****]

          1.7 "GOVERNMENTAL AUTHORITY" means any US or Norwegian, federal,
national, supranational, state, provincial, municipal, local, or similar
government, governmental, regulatory or administrative authority, agency or
commission or any court, tribunal, or judicial or arbitral body.

           1.8 "INITIAL PERIOD" means the time period commencing on the Effective
Date and ending on the Termination Date.

          1.9 "INTELLECTUAL PROPERTY RIGHTS" means all rights in, to, or arising
out of: (i) any patent, national or international, or any application therefor
and any and all reissues, divisions, continuations, renewals, extensions and
continuations-in-part thereof; (ii) inventions, discoveries (whether patentable
or not in any country), invention disclosures, improvements, trade secrets,
proprietary information, know-how, technology and technical data; (iii)
copyrights, copyright registrations, mask works, mask work registrations, and
applications therefor in the any country, and all other rights corresponding
thereto throughout the world; and (iv) any other proprietary rights in or to
Technology anywhere in the world.

          1.10 "JOINT INVENTION" is defined in Section 5.1 (Intellectual
Property Rights in Developed Technology).

          1.11 "LICENSED PRODUCTS" means Wafers, Cells, and/or Modules, as the
case may be, in which the Wafers are made using String Ribbon Technology.

          1.12 "LICENSABLE" means possession of the ability to grant a license
or sublicense of, or within, the scope provided for in this Agreement without
payment of any fee to, or violating the terms of any agreement or other
arrangements with a Third Party and without violating any applicable laws, rules
or regulations.

          1.13 [****][****]

          1.14 "MATERIAL IP" means Intellectual Property Rights and Technology
owned by or Licensable by REC [****]. To avoid doubt, Material IP


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comprises, without limitation, Patents on Technology [****]. Notwithstanding
anything to the contrary, Material IP shall not include, in the event of an
acquisition of REC, Intellectual Property Rights of the acquirer of REC.

          1.15 "MODULE" means an assembly of multiple, electrically connected
Cells.

          1.16 "POST TERMINATION PERIOD" means the time period commencing
immediately after the Termination Date. "[****]" means the [****] period
commencing immediately after the Termination Date. [****]" means the [****]
period commencing immediately after the Termination Date.

          1.17 "STRING RIBBON" means [****].

          1.18 "TECHNOLOGY" means information and technology in tangible and/or
intangible form and materials, embodiments, implementations or improvements of
any technology, including, but not limited to: software, media, data
collections, databases, techniques, methods, processes, formulae, systems,
hardware, equipment, prototypes, proofs of concept, apparatuses, hardware,
software, algorithms, files, routines, documents, designs, drawings, plans,
specifications and the like.

          1.19 "TERMINATION DATE" means the date on which the Master Agreement
is terminated in accordance with its terms.

          1.20 "WAFER" means a crystalline silicon material substrate that is
intended to but has not yet been made into a Cell.

     2. JOINT DEVELOPMENT

          2.1 IN GENERAL. On the terms and conditions set forth in this
Agreement, the parties agree to jointly develop improvements to Evergreen's
manufacturing processes. REC agrees to participate in this joint development
through the performance of the services described herein (the "DEVELOPMENT
SERVICES").

          2.2 INITIAL ASSISTANCE. REC will disclose to Evergreen REC's
Technology regarding the items set forth in EXHIBIT A ("INITIAL DELIVERABLES"),
to the extent that the parties jointly determine that such Technology may be
applicable to Evergreen and EverQ's manufacturing of Wafers, Cells, and Modules.
[****]

          2.3 ONGOING TECHNICAL ASSISTANCE AND CONSULTING. In addition to the
Development Services contemplated under Section 2.2 (Initial Assistance), REC
shall provide Evergreen technical assistance and consulting as mutually agreed
by the Parties to assist Evergreen in improving the manufacturing of String
Ribbon Wafers, Cells and Modules. The Parties will meet periodically to review
the progress of the Development


                                      -3-

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Services. [****]. In the event that the Parties contemplate modifying or
expanding the scope of the Development Services, the Parties shall mutually
agree upon the specifications, timing and costs of such work. The payment for
any Development Services shall be in accordance with Section 4 (Payments) unless
otherwise agreed by the Parties.

          2.4 ACCESS TO REC RESOURCES. In connection with the Development
Services, REC will provide Evergreen reasonable access to REC personnel,
documents and facilities to facilitate the development of Evergreen's
manufacturing process. REC will use commercially reasonable efforts to assign to
the Development Services employees that have sufficient qualifications and
experience with respect to the subject mater of the Development Services and
make such personnel available to Evergreen.

          2.5 ASSIGNMENT OF PERSONNEL. Unless otherwise expressly agreed,
employees of each party remain employees of their respective employer,
notwithstanding their location in the respective facility of the other party or
their participation in the provision or receipt of the Development Services.

          2.6 COMPLIANCE WITH RULES. While at the facility of any party
("HOSTING PARTY") in connection with this Agreement all employees and agents of
the other party ("VISITING PARTY") shall fully abide by all plant rules and
regulations of the Hosting Party.

          2.7 MATERIAL IP.

                (A) MATERIAL IP - NOTIFICATION. If REC has developed Material IP
in the Initial Period [****], REC shall promptly
submit a general, written description of the Material IP to Evergreen, with
reference to this Section. Upon Evergreen's request, REC will further disclose
to Evergreen and provide Evergreen assistance in implementing the respective
Material IP in accordance with Section 2.3 (Ongoing Technical Assistance and
Consulting).

               (B) LICENSE TO MATERIAL IP. Material IP shall be licensed to
Evergreen under Section 5.6 (Background License) except that the license of
Material IP is royalty-bearing to the extent provided in Section 4.3 (Royalty on
Material IP). Notwithstanding the foregoing, Evergreen shall have the right to
exclude any item of Material IP from this Agreement by providing REC written
notice of such exclusion, and after Evergreen has provided such notice, the
respective Material IP shall be excluded from the scope of the license granted
under this Agreement.

     3. ACCESS TO EVERGREEN TECHNOLOGY

          3.1 Upon REC's request prior to [****], the Parties agree to negotiate
in good faith entering into a non-exclusive, world-wide license agreement under
which REC will have a license to manufacture Wafers using String Ribbon
Technology after [****] subject to mutually agreed terms and conditions. These
terms and conditions will be in line with standard commercial terms [****].


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          3.2 In the event that Evergreen intends to commercialize String Ribbon
Technology through such a license agreement in [****], Evergreen shall notify
REC of its intention and provide REC an opportunity to negotiate such a license
agreement with Evergreen. After [****] of good faith negotiations from
Evergreen's notice, neither REC nor Evergreen shall be obligated to continue to
negotiate such a license, and Evergreen shall be free to negotiate and enter a
license agreement with a third party, subject to the following: Evergreen shall
only have the right to enter such agreement with a third party without notifying
REC provided that the conditions of such license agreement are not materially
more favorable to the third party, taken as a whole, than the last conditions
offered to REC. If the terms to be entered with a third party in [****] are
materially more favorable than the last conditions offered to REC, REC may elect
to enter such a license under such terms. In the event that REC does not agree
to enter a license agreement having such terms within [****] of Evergreen's
notice outlining such terms, Evergreen shall have the right to negotiate and
enter any license agreement with a third party on terms that are materially as
favorable as, or less favorable than, such terms. REC shall not have any
obligation to agree to any terms which are unique to the third party. [****]

     4. PAYMENTS

          4.1 [****]. Evergreen will pay REC for the Development Services on a
[****]. In advance of commencing with any phase of the Development Services, REC
will submit an estimate of costs for such phase to Evergreen. In the event that
REC determines that the [****] will exceed the estimate, REC shall seek
Evergreen's a