U.S. Virgin Islands Water and Power Authority

U.S. Virgin Islands Water and Power Authority REQUIREMENTS AND PROCEDURES FOR INTERCONNECTION OF SOLAR PHOTOVOLTAIC GENERATION TO THE ELECTRICAL DISTRIBUTION SYSTEM Request for Proposals from Independent Power Producers for Solar Photovoltaic Generation, PR-18-11 Issued May 18, 2011

TABLE OF CONTENTS PART I INTERCONNECTION PROCEDURES...3 (A) Definitions...3 (B) Scope...4 (C) Process and Criteria for Small-Scale Solar PV Facilities...4 (D) Process and Criteria for Large-Scale Solar PV Facilities...6 PART II INTERCONNECTION STANDARDS...9 Attachment 1 Information Provided by Seller for Interconnection of Small-Scale Solar PV Facilities...12 Attachment 2 Information Provided by Seller for Interconnection of Large-Scale Solar PV Facilities...14 Attachment 3 Interconnection Completion Certificate...17 Attachment 4 Preliminary Interconnection Study Agreement...20 Attachment 5 Interconnection Agreement...22 2

PART I INTERCONNECTION PROCEDURES (A) Definitions Capitalized terms used but not defined in these Interconnection Procedures shall have the meaning set forth in the Model Power Purchase Agreement attached as Exhibit A to the Request for Proposals from Independent Power Producers for Solar Photovoltaic Generation, PR-18-11, issued by the U.S. Virgin Islands Water and Power Authority ( WAPA or the Authority ) on May 18, 2011, (the Power Purchase Agreement ), to which these Interconnection Procedures are attached. In addition, the following terms shall have the meanings set forth below: 1. Delivery Point means the point in the interconnection of a Facility with WAPA s Electric System, as indicated in Attachment 1 to these Interconnection Procedures or the Final Interconnection Study, if any. Delivery Point shall have the same meaning as Point of Common Coupling, as defined in IEEE Standard 1547. 2. Fault Current means electrical current that flows through a circuit and is produced by an electrical fault, such as to ground, double-phase to ground, three-phase to ground, phase-to-phase, and three-phase. A Fault Current is several times larger in magnitude than the current that normally flows through a circuit. 3. IEEE means the Institute of Electrical and Electronic Engineers. 4. IEEE Standards means the standards published by the Institute of Electrical and Electronic Engineers, available at www.ieee.org. 5. Seller s Interconnection Facilities means the interconnection equipment and associated facilities on Seller s side of the Delivery Point that are required to access WAPA s Electric System, along with any easements, rights of way, surface use agreements and other interests or rights in real estate reasonably necessary for the construction, operation and maintenance of such equipment and facilities, including any modification, addition, or upgrades to such equipment and facilities necessary to physically and electrically interconnect the Facility to WAPA s Interconnection Facilities, as further described in Attachment 1 to these Interconnection Procedures, or as indicated in the Final Interconnection Study, if any. 6. System Protection Facilities means the equipment, including necessary protection signal communications equipment, required (a) to protect WAPA s Electric System from faults or other electrical disturbances occurring at the Facility, and (b) to protect the Facility from faults or other electrical system disturbances occurring on WAPA s Electric System or on other delivery systems or other generating systems to which WAPA s Electric System is directly connected, as indicated in the Preliminary Interconnection Study or the Final Interconnection Study, if any. 3

7. System Upgrade Facilities means the equipment and facilities at or beyond the Delivery Point, excluding WAPA s Interconnection Facilities, that are necessary or advisable under Interconnection Standards, as is preliminarily described in Exhibit B but may be changed in the Final Interconnection Study, if any, to be incorporated into WAPA s Electric System for the Facility to connect reliably and safely to WAPA s Electric System, and for WAPA s Electric System to operate reliably and safely and in a manner that meets the Interconnection Standards, and in each case including any modification, addition, or upgrades to such equipment and facilities necessary for the Facility to connect reliably and safely to WAPA s Electric System. 8. UL means Underwriters Laboratories, which has established standards available at http://ulstandardsinfonet.ul.com/ that relate to components of solar PV systems and facilities. 9. WAPA s Interconnection Facilities means the facilities necessary to connect WAPA s Electric System to Seller s Interconnection Facilities and the associated equipment procured or installed for the purpose of interconnecting the Facility, including any modifications, additions or upgrades to such equipment and facilities. WAPA s Interconnection Facilities shall not include System Upgrade Facilities. (B) Scope 1. Scope. These Interconnection Procedures are applicable for interconnections of Facilities proposed to be constructed by any Seller pursuant to its Power Purchase Agreement, to which this Schedule 11 is attached. 2. Classification of Facilities. There are two classifications of Facilities under these Interconnection Procedures: (a) Small-Scale Solar PV Facilities - For those Facilities ( Small-Scale Solar PV Facilities ) that pass the screening criteria as described in Section I(C)(2) (the Screening Criteria ), the interconnection requirements are incorporated in the Interconnection Procedures in Part II of this Schedule 11. (b) Large-Scale Solar PV Facilities - For those Facilities that do not pass the Screening Criteria ( Large-Scale Solar PV Facilities ), the standard form Interconnection Agreement is provided in Attachment 5 to this Schedule 11. (C) Process and Criteria for Small-Scale Solar PV Facilities 1. Provision of Information. For Small-Scale Solar PV Facilities, Seller has provided WAPA with the information set forth in Attachment 1 to these Interconnection Procedures prior to the Contract Date. WAPA will provide Seller with the requirements for the step-up transformer required to be included as part of Seller s Interconnection Facilities, if any, once WAPA has received the information set forth in Attachment 1. 4

2. Screening Criteria. Facilities that meet the following Screening Criteria shall be considered Small-Scale Solar PV Facilities: (a) For interconnection of a Facility to a radial distribution circuit, the Facility aggregated with all other generation capable of exporting energy on a line section will not exceed ten (10) percent of the line section s annual peak load as most recently measured at the substation or calculated for the line section. A line section is that portion of the radial distribution circuit to which Seller seeks to interconnect and is bounded by automatic sectionalizing devices or the end of a distribution line. (b) No construction of Interconnection Facilities or System Upgrades by WAPA on WAPA s Electric System, other than Metering Devices, shall be required to accommodate the Facility. (c) The Facility, in aggregation with other generation on the distribution circuit, will not contribute more than ten (10) percent to the distribution circuit s maximum Fault Current at the point on the high-voltage (primary) level nearest the proposed Delivery Point. (d) The Facility, in aggregate with other generation on the distribution circuit, will not cause any distribution protective devices and equipment (including substation breakers, fuse cutouts, and line reclosers), or WAPA customer equipment on the system, to exceed ninety (90) percent of the short circuit interrupting capability. The Facility shall not be interconnected to a circuit that already exceeds ninety (90) percent of the short circuit interrupting capability. (e) The Facility shall be located no more that 1/4 mile (1320 feet) from a WAPA substation or a load that is larger that the proposed system. (f) The Electric Capacity of the Facility shall not exceed seventy five (75) percent of the capacity of the transformer bank between the Facility and WAPA s Electric System. 3. Screens Failure. Despite the failure of one or more of such Screening Criteria, WAPA, at its sole option, may approve the interconnection of a Facility as a Small- Scale Solar PV Facility if consistent with safety and reliability. 4. Certification and Inspection. Seller shall notify WAPA not less than fifteen (15) Business Days prior to the anticipated start-up date of a Small-Scale Solar PV Facility. Such notification shall be accompanied by a certification of a responsible officer of Seller, substantially in the form of Attachment 3 to these Interconnection Procedures (an Interconnection Completion Certificate ). Upon receipt of such notice and certificate, WAPA may contact Seller to schedule WAPA inspection of such Facility at WAPA s expense. Any inspection shall be scheduled to occur, at a time mutually agreeable to the Parties, within ten (10) Business Days of Seller s notice of the anticipated start-up date and Interconnection Completion Certificate. A Facility shall not pass WAPA s inspection unless such Facility fully complies with the Interconnection Standards and the requirements of the Power Purchase 5

Agreement and the Interconnection Agreement, if applicable. If a Facility initially fails a WAPA inspection, WAPA shall offer to redo the inspection at Seller s expense at a time mutually agreeable to the Parties. 5. Interconnection and Parallel Operation. The Facility has been inspected and approved by the appropriate local electrical wiring inspector with jurisdiction over the Facility, and Seller has sent documentation of the approval to WAPA. Evidence of approval by an electric code official includes a signed Interconnection Completion Certificate in the form of Attachment 3 or other inspector-provided documentation. After WAPA has received Seller s Interconnection Completion Certificate and the Small-Scale Solar PV Facility has passed WAPA s inspection, or WAPA has explicitly waived the right to inspect the Facility in writing, Seller may begin interconnected operation of such Facility with WAPA s Electric System under the Power Purchase Agreement. (D) Process and Criteria for Large-Scale Solar PV Facilities 1. Provision of Information. For Large-Scale Solar PV Facilities, Seller has provided WAPA with the information set forth in Attachment 2 to these Interconnection Procedures not later than the Contract Date. WAPA will provide Seller with the requirements for the step-up transformer required to be included as part of Seller s Interconnection Facilities, if any, once WAPA has received the information set forth in Attachment 2. 2. Interconnection Study. (a) Preliminary Interconnection Study. Prior to the Contract Date, WAPA has conducted, at Seller s expense, a preliminary interconnection study of the proposed Facility, based in part on information provided by Seller, to evaluate the expected impact of the Facility on the safety and reliability of WAPA s Electric System, and to assess what Interconnection Facilities and System Upgrade Facilities, if any, are expected to be needed for the Facility to connect reliably and safely to WAPA s Electric System, and for the Facility and WAPA s Electric System to be operated in parallel reliably and safely and in a manner that meets the Interconnection Standards (the Preliminary Interconnection Study ). Such study has been conducted in accordance with a Preliminary Interconnection Study Agreement between WAPA and Seller, substantially in the form of Attachment 4 to these Interconnection Procedures. The Parties acknowledge and agree that the results of such study have been provided to Seller prior to the Contract Date and are the basis for the preliminary description of the Interconnection Facilities and System Upgrade Facilities set forth in Exhibit A to the Power Purchase Agreement. The Parties further acknowledge and agree that such description is preliminary, and that the Final Interconnection Study, if any, may require changes to the design of the Interconnection Facilities or System Upgrade Facilities. 6

(b) Additional Information. Within sixty (60) Days after the Contract Date, Seller shall provide to WAPA data set forth below, in form and substance reasonably satisfactory to WAPA. If WAPA determines that any additional information is required from Seller during the Final Interconnection Study, if any, WAPA shall notify Seller of the need for such additional information. Seller shall use reasonable efforts to provide such information as soon as practicable but no later than fifteen (15) Days from the date of any such request. (c) Final Interconnection Study. If WAPA, at its sole option, determines that the Final Interconnection Study will be required, WAPA, at Seller s expense, shall perform the Final Interconnection Study or shall have the Final Interconnection Study performed within one hundred and twenty (120) Days of Seller s provision of all information, in final form, required by Section (D)(2)(b). (d) Subject of Final Interconnection Study. The Final Interconnection Study will assess the impact of connecting the Facility to WAPA s Electric System and the impact of the delivery of electricity from the Facility to WAPA s Electric System. The Final Interconnection Study, among other things, will (i) identify probable impacts of the requested interconnection on the operation, reliability and safety of WAPA s Electric System; (ii) assess whether the requested interconnection will require System Upgrade Facilities or System Protection Facilities; (iii) determine the location and configuration of the Delivery Point, Interconnection Facilities, System Upgrade Facilities and System Protection Facilities; (iv) assess costs of design, engineering, procurement, and construction of such facilities; (v) identify a schedule for constructing, testing, and completing such facilities consistent with the commencement of operation of the Facility under the Power Purchase Agreement; and (vi) designate the WAPA operations center that will coordinate the operations of the Facility. (e) following: Inclusion in Study. WAPA s impact study also may include the i. Load-Flow Study. ii. iii. iv. Short-Circuit Study. Circuit Protection and Coordination Study. Impact on System Operation. v. Stability Study (and the conditions that would justify including this element in the Impact Study). vi. Voltage-Collapse Study (and the conditions that would justify including this element in the Impact Study). vii. A review of the Facility s protective devices for adherence to the Interconnection Standards. (f) Information Exchange. During the course of the Final Interconnection Study, Seller and WAPA shall exchange information regarding the design and compatibility of the Interconnection Facilities and System Upgrade Facilities 7

and compatibility of the Interconnection Facilities with WAPA s Electric System, and shall work diligently and in good faith to make any design changes reasonably necessary to achieve such compatibility. The Parties shall meet periodically during such study to discuss alternative interconnection options, to exchange information that would be reasonably expected to impact such interconnection options, to analyze such information, and to determine the potential feasible points of interconnection. (g) Title to Information. The Preliminary Interconnection Study, the Final Interconnection Study, if any, and all data, analyses, and reports collected as part of or in connection with either such interconnection study, all work papers generated as part of either study, and all iterations of the preliminary and final studies (including periodic updates and drafts by WAPA) shall be the property of WAPA. (h) Payments. Seller shall be responsible for payment of all reasonable costs and expenses, including charges and fees of consultants, incurred by WAPA for the Final Interconnection Study, if any. Seller shall pay all such amounts not later than thirty (30) days after invoice from WAPA. 3. Interconnection Agreement. Effective as of the Contract Date, Seller and WAPA shall enter into an Interconnection Agreement, substantially in the form of Attachment 5 to these Interconnection Procedures. 4. Certification and Inspection. Seller shall notify WAPA not less than fifteen (15) Business Days prior to the anticipated start-up date of a Large-Scale Solar PV Facility. Such notification shall be accompanied by an Interconnection Completion Certificate. Upon receipt of such notice and certificate, WAPA may contact Seller to schedule WAPA inspection of such Facility at WAPA s expense. Any inspection shall be scheduled to occur, at a time mutually agreeable to the Parties, within ten (10) Business Days of Seller s notice of the anticipated start-up date and Interconnection Completion Certificate. A Facility shall not pass WAPA s inspection unless such Facility fully complies with the Interconnection Standards and the requirements of the Power Purchase Agreement and the Interconnection Agreement, if applicable. If a Facility initially fails a WAPA inspection, WAPA shall offer to redo the inspection at Seller s expense at a time mutually agreeable to the Parties. 5. Interconnection and Parallel Operation. After WAPA has received Seller s Interconnection Completion Certificate and the Large-Scale Solar PV Facility has passed WAPA s inspection, or WAPA has explicitly waived the right to inspect the Facility in writing, Seller may begin interconnected operation of such Facility with WAPA s Electric System under the Power Purchase Agreement. 8

PART II INTERCONNECTION STANDARDS 1. Technical Standards. Each Facility shall comply with all other applicable Codes and Standards, Applicable Laws, and Good Engineering and Operating Practices, and with the following standards, as applicable: (a) IEEE Standard 1547 for Interconnecting Distributed Resources with Electric Power Systems for Facilities up to 10 MW in size. (b) IEEE Standard 1547.1 for Conformance Test Procedures for Equipment Interconnecting Distributed Resources with Electric Power Systems. (c) UL 1741 Standard for Inverters, Converters and Controllers for Use in Independent Power Systems. UL 1741 compliance must be recognized or certified by a Nationally Recognized Testing Laboratory as designated by the U.S. Occupational Safety and Health Administration. Certification of a particular model or a specific piece of equipment is sufficient. It is also sufficient for an inverter built into a Facility to be recognized as being UL 1741 compliant by a Nationally Recognized Testing Laboratory. Inverter(s). (d) NFPA 70 National Electrical Code (latest edition). (e) ANSI C84.1-2006, American National Standard for Electric Power Systems and Equipment Voltage Ratings (60 Hertz) (f) IEEE 519-1992 IEEE Recommended Practices and Requirements for Harmonic Control in Electrical Power Systems (g) PV modules and panels must be listed and be in compliance with Underwriters Laboratories (UL) Standard 1703, Standard for Safety: Flat- Plate Photovoltaic Modules and Panels. 2. Additional Standards and Requirements. In addition, each Facility will comply with the following standards and requirements: (a) Permits and Approvals. Seller is responsible for obtaining any necessary local code official approval (electrical, zoning, etc.), as well as all other Permits and Approvals, for the Facility and Seller s Interconnection Facilities. (b) Commercial Operation. Interconnection of a Facility to WAPA s Electric System pursuant to these Interconnection Procedures does not constitute Commercial Operation of such Facility, which shall be determined as provided in the Power Purchase Agreement. (c) Commissioning Test. Seller shall conduct commissioning tests of the Facility and Seller s Interconnection Facilities pursuant to IEEE Standard 1547 and in compliance with all manufacturer requirements. 9

(d) Operations and Maintenance. Seller shall be fully responsible to operate, maintain, and repair the Facility as required to ensure that it complies at all times with IEEE Standard 1547. (e) Periodic Testing. WAPA may require any manufacturerrecommended testing and for Large-Scale Solar PV Facilities, all interconnection-related protective functions and associated batteries shall be periodically tested at intervals specified by the manufacturer or WAPA. Periodic test reports or a log for inspection shall be maintained. (f) External Disconnect Switch. If indicated by the Preliminary Interconnection Study or the Final Interconnection Study, WAPA may require a manual, lockable, load break utility-interface disconnect switch between the output of the photovoltaic inverter and Seller s wiring connected to WAPA s Electric System. The load break device shall be both visible and accessible to WAPA s employees. Seller hereby grants a full license to access the Property and the PV system to ensure compliance herewith. (g) Disconnection. WAPA may temporarily disconnect the Facility (i) for Transmission Events, unscheduled outages, or Electric System Emergencies, or (ii) if the Generating Facility does not operate in the manner consistent with these terms and conditions of the Power Purchase Agreement, the Interconnection Agreement, if any, or the Interconnection Standards. WAPA shall inform Seller in advance of any scheduled disconnection, or as is reasonable after an unscheduled disconnection. (h) Testing of Protective Relays. WAPA reserves the right to test the anti-islanding features and the power output quality of the inverter. (i) Inspection. WAPA shall have the right to inspect any Facility before and after interconnection approval is granted, at reasonable hours and with reasonable prior notice provided to Seller. If WAPA discovers a Facility is not in compliance with the requirements of the Interconnection Standards, and the noncompliance adversely affects the safety or reliability of the electric system, WAPA may require disconnection of such Facility until the Facility complies with the Interconnection Standards. (j) PV System Equipment Protection. It is the responsibility of Seller to protect its generating equipment, inverters, protection devices, and other system components from damage by the normal conditions and operations that occur on the part of WAPA in delivering and restoring power to WAPA s Electric System. WAPA hereby disclaims any liability whatsoever for damage to Seller s equipment. (k) Costs and Expenses. Except as otherwise expressly set forth in the Power Purchase Agreement or these Interconnection Procedures, or the Interconnection Agreement, if any, Seller is responsible for all the costs for the design, development, permitting, engineering, procurement, construction, completion, installation, and testing 10

related to the Interconnection Facilities, including WAPA s Interconnection Facilities and any System Upgrade Facilities. 11

Attachment 1 Information Provided by Seller for Interconnection of Small-Scale Solar PV Facilities Seller shall have provided to WAPA the information required below, including a one-line diagram if required by WAPA, prior to the Contract Date. Additional information to evaluate the proposed interconnection may be required by WAPA. Seller: Name: Address: City, State, Zip: Telephone (Day): (Evening): Fax: E-Mail Address: Facility: WAPA Facility ID#: Location (if different from above): GPS Coordinates: Site Owner: Desired Feeder/Interconnection Point: Inverter Manufacturer: Model: Inverter Nameplate Rating (kw (DC)): and (kw (AC)) System Design Capacity: (kw (DC)) and (kw (AC)) Is the equipment UL1741 Listed? of UL1741 listing. Yes No If Yes, attach evidence Estimated Installation Date: Estimated In-Service Date: 12

List components of Seller s Interconnection Facilities that are UL certified: Equipment Type 1. 2. 3. If required by WAPA, attach a one-line diagram of the Facility. 13

Attachment 2 Information Provided by Seller for Interconnection of Large-Scale Solar PV Facilities Seller shall have provided to WAPA the information required below, including a one-line diagram and a load flow data sheet, prior to the Contract Date. Additional information to evaluate the proposed interconnection may be required by WAPA. 1. Seller Information Seller: Name: Address: City, State, Zip: Telephone (Day): (Evening): Fax: E-Mail Address: 2. Facility Specifications WAPA Facility ID#: Location (if different from above): GPS Coordinates: Site Owner: Desired Feeder/Interconnection Point: Inverter Manufacturer: Model: Inverter Nameplate Rating: (kw (DC)) and (kw (AC)) System Design Capacity: (kw (DC)) and (kw (AC)) Is the equipment UL1741 Listed? of UL1741 listing. Yes No If Yes, attach evidence Estimated Installation Date: Estimated In-Service Date: 14

List components of Seller s Interconnection Facilities that are UL certified: Equipment Type 1. 2. 3. 3. Transformer Information and Protective Relay Specifications Will a transformer be used between the generator and the Delivery Point? Yes No Interconnecting Circuit Breaker: (if applicable) Manufacturer: Type: Load Rating (Amps): Interrupting Rating (Amps): Trip Speed (Cycles): Interconnection Protective Relays: (if applicable) If Microprocessor-Controlled: List of Functions and Adjustable Setpoints for the protective equipment or software: Setpoint Function Minimum Maximum 1. 2. 3. Control Batteries: (if applicable) Manufacturer: Type: Discrete Components: (if applicable) (Enclose Copy of any Proposed Time-Overcurrent Coordination Curves) Manufacturer: Type: Style/Catalog No.: Proposed Setting: Manufacturer: Type: Style/Catalog No.: Proposed Setting: Manufacturer: Type: Style/Catalog No.: Proposed Setting: Current Transformer Data: (if applicable) (Enclose Copy of Manufacturer s Excitation and Ratio Correction Curves) Manufacturer: 15

Type: Accuracy Class: Proposed Ratio Connection: Potential Transformer Data: (if applicable) Manufacturer: Type: Accuracy Class: Proposed Ratio Connection: 4. General Information Enclose copy of site electrical one-line diagram showing the configuration of all Facility equipment, current and potential circuits, and protection and control schemes. This oneline diagram must be signed and stamped by a licensed Professional Engineer if the Facility is larger than 100 kw. Is one-line diagram enclosed? Yes No Enclose copy of any site documentation that indicates the precise physical location of the proposed Facility and all protective equipment (e.g., GPS or USGS topographic map or other diagram or documentation). Is site documentation enclosed? Yes No Enclose copy of any site documentation that describes and details the operation of the protection and control schemes. Is available documentation enclosed? Yes No Enclose copies of schematic drawings for all protection and control circuits, relay current circuits, relay potential circuits, and alarm/monitoring circuits (if applicable). Are schematic drawings enclosed? Yes No Enclose description of the proposed communication channel, a communication diagram, and types of communication integration (if applicable). Is communications information enclosed? Yes No 16

Attachment 3 Interconnection Completion Certificate This Interconnection Completion Certificate ( Certificate ) is provided by (the Seller ) in connection with the Power Purchase Agreement, dated as of, 2011, by and between the Seller and U.S. Virgin Islands Water and Power Authority ( WAPA or the Authority ). Capitalized terms used by not defined in this Certificate shall have the meaning set forth in the Power Purchase Agreement. A. Seller Information Seller Name Telephone # Mailing Address Email City State or Territory Zip Code B. Site Information Site Owner Telephone # Site Location GPS Coordinates of Site Feeder Location/Interconnection Point WAPA Facility ID#: 17

C. Facility Information System Name/Model: Array DC Power at SOC in watts Array manufacturer and model Inverter manufacturer and model Batteries (if applicable) Array location Inverter location AC Disconnect location Facility nameplate rating: (kw (DC)) and (kw (AC)) Facility Capacity (kw (DC)): and (kw (AC)) If required by WAPA, attach a one-line diagram of the Generating Facility as completed. D. Contractor Information Installing Electrician: Firm: USVI License No.: Mailing Address: City: State: Zip Code: Telephone (Daytime): (Evening): Facsimile Number: E-Mail Address: Installation Date: Interconnection Date: E. Hardware and Installation Compliance 1. The system hardware is in compliance with the Interconnection Standards. 2. The system has been installed in compliance the Interconnection Standards, including with IEEE 1547, Standard for Interconnecting Distributed Resources with Electric Power Systems and NFPA 70 National Electrical Code (latest edition). Contractor signature Date Print name 18

F. Owner Acknowledgment The Facility, including Seller s Interconnection Facilities, have been installed, tested, completed and commissioned, and are ready of interconnection and parallel operation with WAPA s Electric System, in accordance with the Power Purchase Agreement, and with the Interconnection Agreement or Interconnection Standards, as applicable. Seller Name: By: Name: Title: Date G. Electrical Code Inspection The system has been installed and inspected in compliance with the local Building/Electrical Code of (appropriate Governmental Authority): Inspection Agency: Inspector Signature Name: Title: Date H. WAPA Approval Interconnection Approved: VIRGIN ISLANDS WATER AND POWER AUTHORITY By: Name: Title Date 19

Attachment 4 Preliminary Interconnection Study Agreement This AGREEMENT ( Agreement ) is made and entered into this day of by and between, a organized and existing under the laws of the State of, ( Seller ) and the US Virgin Island Water and Power Authority existing under the laws of the U.S. Virgin Islands ( WAPA ). Seller and WAPA each may be referred to as a Party or collectively as the Parties. RECITALS: WHEREAS, Seller is proposing to develop a Large-Scale Solar PV Facility as provided in its proposal to WAPA, dated, 2011 (the Bid ), in response to WAPA s Request for Proposals from Independent Power Producers for Solar Photovoltaic Generation PR- 18-11, issued May 18, 2011 (the RFP ) and WHEREAS, Seller desires to interconnect the Facility with WAPA s Electric System; and WHEREAS, WAPA has determined that a Preliminary Interconnection Study is necessary to assess the proposed interconnection of Seller s proposed Facility to WAPA s Electric System; NOW, THEREFORE, in consideration of and subject to the mutual covenants contained herein, the Parties agree as follows: 1. When used in this Agreement, capitalized terms shall have the meanings indicated. Capitalized terms that are not defined in this Agreement shall have the meanings specified in WAPA s Interconnection Procedures attached to the RFP. 2. Seller elects and WAPA shall cause to be performed a Preliminary Interconnection Study consistent with the Interconnection Procedures. 3. The scope of the Preliminary Interconnection Study shall be based on information supplied in the Bid, the information provided to WAPA pursuant to the Interconnection Procedures, and any other information or assumptions set forth in any attachment to this agreement. 4. WAPA reserves the right to request additional technical information from Seller as may reasonably become necessary consistent with Good Engineering and Operating Practices during the course of the Preliminary Interconnection Study. If after signing this Agreement, Seller (with WAPA s consent) modifies its Bid or any of the information or assumptions provided to WAPA or set forth in any attachment to this Agreement, the time to complete the Preliminary Interconnection Study may be extended by agreement of the Parties. 20

5. In performing the Preliminary Interconnection Study, WAPA may rely, to the extent reasonably practicable, on existing studies of recent vintage. Seller will not be charged for such existing studies; however, Seller shall be responsible for charges associated with any new study or modifications to existing studies that are reasonably necessary to perform the Preliminary Interconnection Study. 6. WAPA may require a study deposit of the greater of fifty (50) percent of estimated non-binding good faith study costs or $10,000. 7. The Preliminary Interconnection Study shall be completed and the results shall be transmitted to Seller within twenty (20) Business Days after this Agreement is signed by the Parties, unless the proposed Facility will impact other proposed Facilities. 8. Study fees shall be based on actual costs and will be invoiced to Seller after the study is transmitted to Seller. 9. Seller shall pay any actual study costs that exceed the deposit within thirty (30) days of receipt of the invoice. WAPA shall refund any excess amount without interest within thirty (30) Days of the invoice. In witness whereof, the Parties have caused this agreement to be duly executed by their duly authorized officers or agents on the day and year first above written. For WAPA Signature: Date: Name (printed): Title: For Seller Signature: Date: Name (printed): Title: Are attachments included to supplement or modify information contained in the Bid? Yes No 21

Attachment 5 Interconnection Agreement This AGREEMENT ( Agreement ) is made and entered into this day of, ( Effective Date ) by and between, a organized and existing under the laws of the State of, ( Seller ) and, a, existing under the laws of the State of, ( WAPA ). Seller and WAPA each may be referred to as a Party, or collectively as the Parties. RECITALS: WHEREAS, Seller is proposing to develop a solar PV electric generating facility, as contemplated by the Power Purchase Agreement, dated as of the Effective Date, by and between Seller and WAPA (the Power Purchase Agreement ); and WHEREAS, Seller desires to interconnect such solar PV facility (as described in the Power Purchase Agreement, the Facility ) with WAPA s Electric System pursuant to the Power Purchaser Agreement and the Interconnection Procedures attached as Schedule 11 thereto; NOW, THEREFORE, in consideration of and subject to the mutual covenants contained herein, the Parties agree as follows: Article 1. Scope and Limitations of Agreement 1.1 Capitalized terms in this Agreement if not defined herein shall have the meanings set forth in the Power Purchase Agreement, including the Interconnection Procedures. 1.2 This Agreement and the Power Purchaser Agreement govern the terms and conditions under which the Facility will interconnect to, and operate in parallel with, WAPA s Electric System. 1.3 This Agreement does not constitute an agreement to purchase or deliver any electricity or any other Product. 1.4 Nothing in this Agreement is intended to affect any other agreement between WAPA and Seller. However, in the event that the provisions of this Agreement are in conflict with the provisions of the Power Purchase Agreement, the Power Purchase Agreement shall control. 22

Article 2. Interconnection Generally 2.1 Construction and Operation Seller shall construct, test, commission, interconnect, operate, and maintain the Facility and Seller s Interconnection Facilities, and WAPA shall, at Seller s expense, construct, test, commission, interconnect, operate, and maintain WAPA s Interconnection Facilities, as such facilities are described in the Exhibits to this Agreement or the Final Interconnection Study, if any, all in accordance with the applicable manufacturer s recommendations, the Final Interconnection Study, if any, and the Interconnection Standards. WAPA shall, at Seller s expense, construct, test, commission, interconnect, operate and maintain the System Upgrade Facilities, if any, as such facilities are described in the Exhibits to this Agreement or the Final Interconnection Study, if any, in accordance with the applicable manufacturer s recommendations, the Final Interconnection Study, if any, and the Interconnection Standards. 2.2 Permits and Approvals Seller shall, at its expense, (a) acquire, maintain in effect and comply with, all Permits and Approvals from all Governmental Authorities with jurisdiction over Seller, the Facility or Seller s Interconnection Facilities, and (b) complete all environmental impact studies, in each case necessary for the ownership, construction, operation, maintenance, removal, remediation or completion of the Facility, the Site or Seller s Interconnection Facilities, and for Seller to perform its obligations under this Agreement. WAPA shall not be responsible for any Permits and Approvals or environmental studies or assessments that may be necessary for Seller to perform its obligations under this Agreement. 2.3 Equipment Testing and Inspection Seller shall test and inspect, or cause the testing and inspection, of the Facility and the Interconnection Facilities prior to interconnection in accordance with the Interconnection Standards, including applicable IEEE Standard 1547. 2.4 Interconnection Completion Certificate Prior to commencing parallel operation, Seller shall provide WAPA with a Interconnection Completion Certificate substantially in the form of Attachment 2 to the Interconnection Procedures. The Interconnection Completion Certificate must either be signed by an electrical inspector with the authority to approve the interconnection or be accompanied by the electrical inspector s own form authorizing interconnection of the Facility. 23

2.5 Authorization Seller shall be authorized to commence parallel operation of the Facility with WAPA s Electric System upon submission of such Interconnection Completion Certificate and compliance with the other requirements of the Interconnection Procedures. 2.6 Parallel Operation Obligations Seller shall construct, own, operate and maintain the Interconnection Facilities in compliance with the Interconnection Standards. Seller shall abide by all permissible written rules and procedures developed by WAPA which pertain to the parallel operation of the Facility. 2.7 System Protection Facilities. Seller shall procure all System Protection Facilities identified in the Final Interconnection Study, if any, and shall install, maintain and operate all System Protection Facilities that are part of Seller s Interconnection Facilities. WAPA shall (a) install any System Protection Facilities that may be required on WAPA s Interconnection Facilities or WAPA s Electric System as a result of the interconnection of the Facility and Seller s Interconnection Facilities to WAPA s Interconnection Facilities or WAPA s Electric System and procure any such System Protection Facilities not procured by Seller, the reasonable costs of such installation and procurement to be paid by Seller, and (b) operate and maintain, at Seller s expense, such System Protection Facilities on WAPA s Interconnection Facilities and WAPA s Electric System. WAPA reserves the right to establish reasonable acceptable settings for any installed System Protection Facilities. If the Facility s System Protection Facilities are removed from service or not capable of automatic operation, Seller shall immediately notify WAPA via telephone and then in writing upon the later of the Day of the occurrence or the Day on which Seller obtains knowledge of such occurrence. 2.8 Interconnection Facilities Specifications. 2.8.1 Within one hundred twenty (120) Days after the Commercial Operation Date, Seller shall deliver to WAPA five (5) hard copies and two (2) CDs of a complete and up-to-date set of as-built drawings, information and documents for Seller s Interconnection Facilities, including a one-line diagram, a site plan showing the Facility and Seller s Interconnection Facilities, plan and elevation drawings showing the layout of the Interconnection Facilities, a relay functional diagram, relaying AC and DC schematic wiring diagrams and relay settings for all facilities associated with the step-up transformers, the facilities connecting the Facility to the step-up transformers, and Seller s Interconnection Facilities, and the impedances (determined by factory tests) for the associated step-up transformers and the Facility. The generator step-up transformer included in Seller s Interconnection Facilities shall meet the specifications determined by WAPA. 24

2.8.2 The review of Seller s specifications by WAPA shall not be construed as confirming, endorsing, or providing a warranty as to the design, fitness, safety, durability or reliability of the Facility, the Interconnection Facilities, or the System Upgrade Facilities. 2.9 Communications 2.9.1 If required by the Final Interconnection Study: 2.9.1.1 Seller s Interconnection Facilities shall use Seller-owned dedicated fiber-optic communication circuits from Seller s Interconnection Facilities to WAPA s communication circuits at the Delivery Point and a redundant telecommunications system. 2.9.1.2 Seller shall maintain satisfactory operating communications with WAPA, including providing standard voice line, dedicated voice line and facsimile communications at its Facility control room through use of a dedicated telephone system and a voice communications system, in each case from the Facility to the Delivery Point and which does not rely on the public telephone system. Seller shall also provide the dedicated data circuit(s) necessary to provide Seller data to WAPA through the system specified in accordance with this Agreement (including applicable WAPA requirements) and the Final Interconnection Study. 2.10 Remote Terminal Unit. If required by the Final Interconnection Study, prior to the Initial Synchronization Date, a remote terminal unit, or equivalent data collection and transfer equipment acceptable to the Parties, shall be provided by Seller, and installed by Seller at its expense in Seller s Interconnection Facilities, and by WAPA, at Seller s expense, in WAPA s Interconnection Facilities, to gather meteorological and solar energy production data and measure actual solar insolation, as shall be further set forth in the Final Interconnection Study. 2.11 Equipment Maintenance. Prior to the Commercial Operation Date, Seller shall provide to WAPA preliminary information on schedules to, and description of, equipment maintenance for interconnection and generation equipment, with final information to be provided after such equipment is selected, put on order and such information is provided by the manufacturers. 25

2.12 Emergencies 2.12.1 Obligations. Seller shall use its best efforts to comply with the emergency procedures of WAPA, the VIPSC, and Applicable Laws. 2.12.2 Notice. WAPA shall notify Seller promptly when it becomes aware of an Electric System Emergency that affects WAPA s Interconnection Facilities or WAPA s Electric System that may reasonably be expected to affect Seller s operation of the Facility or Seller s Interconnection Facilities. Seller shall notify WAPA promptly when it becomes aware of an Electric System Emergency that affects the Facility or Seller s Interconnection Facilities that may reasonably be expected to affect WAPA s Electric System or WAPA s Interconnection Facilities. To the extent such information is known, the notification shall describe the Electric System Emergency, the extent of the damage or deficiency, the expected effect on the operation of Seller s or WAPA s facilities and operations, its anticipated duration and the corrective action taken or to be taken. The initial notice shall be followed as soon as practicable with written notice. 2.12.3 Immediate Action. Unless, in Seller s reasonable judgment, immediate action is required, Seller shall obtain the consent of WAPA, such consent not to be unreasonably withheld, prior to performing any manual switching operations at the Facility or Seller s Interconnection Facilities in response to an Electric System Emergency either declared by WAPA or otherwise regarding WAPA s Electric System. 2.12.4 Disconnection. If the electrical output of the Facility, as measured at the Delivery Point, exceeds [ ] kw, WAPA may, in order to protect WAPA s Electrical System from damage, disconnect the Facility or Seller s Interconnection Facilities from WAPA s Electrical System, until such time that the electrical output of the Facility is less than [ ] kw. 2.12.5 WAPA Authority. WAPA may take whatever actions with regard to WAPA s Electric System or WAPA s Interconnection Facilities it deems necessary during an Electric System Emergency in order to (i) preserve public health and safety, (ii) preserve the reliability of WAPA s Electric System or WAPA s Interconnection Facilities, (iii) limit or prevent damage, or (iv) expedite restoration of service. 2.12.6 Seller Authority. Consistent with the Interconnection Standards and this Agreement, Seller may take whatever actions or inactions with regard to the Facility or Seller s Interconnection Facilities during an Electric System Emergency as reasonably may be required to (i) preserve public health and safety, (ii) preserve the reliability of the Facility or Seller s Interconnection Facilities, or (iii) limit or prevent damage. Seller shall use commercially reasonable efforts to minimize the effect of such actions or 26

inactions on WAPA s Electric System and WAPA s Interconnection Facilities. WAPA shall use commercially reasonable efforts to assist Seller in such actions. 2.12.7 Limited Liability. No Party shall be liable to another Party under this Agreement for any action it takes in responding to an Electric System Emergency, so long as such action is made in good faith and is consistent with the Interconnection Standards. 2.13 Right of Access At reasonable hours, and upon reasonable notice, or at any time without notice in the event of an Electric System Emergency or other emergency or hazardous condition, WAPA shall have the right to access to the Site for any reasonable purpose in connection with this Agreement, or as provided in the Power Purchaser Agreement. 2.14 Exclusivity The Interconnection Facilities shall be constructed and used by Seller for the sole purpose of interconnecting the Facility to WAPA s Electric System. Seller shall use such facilities for no other purpose, and Seller shall not permit or suffer any Person to use such facilities other than WAPA or a permitted assignee of this Agreement. Article 3. Effective Date, Term, Termination, And Disconnection 3.1 Effective Date This Agreement shall become effective upon execution by the Parties. 3.2 Term of Agreement This Agreement shall remain in effect until the earlier of the expiration of the Contract Term (including any extension thereof under the Power Purchaser Agreement) or the earlier termination of the Power Purchaser Agreement in accordance with its terms. 3.3 Effect of Termination Upon termination of this Agreement, the Facility will be disconnected from WAPA s Electric System. The termination of this Agreement shall not relieve either Party of its liabilities and obligations, owed or continuing at the time of the termination, including Seller s obligations under Article 4. 3.4 Temporary Disconnection WAPA may reduce, suspend, or interrupt interconnection service, curtail the output of the Facility, or temporarily disconnect the Facility from WAPA s Electric System for so long as reasonably necessary in the event one or more of the following conditions or events: 27

3.4.1 Electric System Emergency: During an Electric System Emergency, WAPA may reduce, suspend, or interrupt interconnection service, curtail the output of the Facility, or temporarily disconnect the Facility from WAPA s Electric System as provided in Article 2.12.4 above. 3.4.2 Routine Maintenance, Construction, and Repair: WAPA may reduce, suspend, or interrupt interconnection service, curtail the output of the Facility, or temporarily disconnect the Facility from WAPA s Electric System to conduct planned maintenance or testing or to install or replace equipment of the interconnection or adjacent transmission, subtransmission, or distribution facilities. WAPA shall provide Seller with advance notice prior to such interruption, and Seller shall use reasonable efforts to coordinate its maintenance outages with WAPA s maintenance schedule, as provided in the Power Purchaser Agreement. 3.4.3 Forced Outages: During any forced outage, WAPA may reduce, suspend, or interrupt interconnection service, curtail the output of the Facility, or temporarily disconnect the Facility from WAPA s Electric System to effect immediate repairs on WAPA s Electric System. WAPA shall use reasonable efforts to provide Seller with prior notice. 3.4.4 Adverse Operating Effects: WAPA shall provide Seller with a written notice of its intention to disconnect the Facility if, based on the Interconnection Standards or Good Engineering and Operating Practices, WAPA determines that operation of the Facility will likely cause unreasonable disruption or deterioration of service to other WAPA customers, or if operating the Facility could cause damage to WAPA s Electric System. Supporting documentation used to reach the decision to disconnect shall be provided to Seller upon request. WAPA may disconnect the Facility if, after receipt of the notice, Seller fails to remedy the adverse operating effect within a reasonable time from the date Seller receives WAPA s written notice supporting the decision to disconnect, unless an Electric System Emergency exists, in which case the provisions of Article 3.4.1 apply. 3.4.5 Modification of the Facility: Seller shall not make any change to the Facility or Seller s Interconnection Facilities that may have a material impact on the safety or reliability of the Interconnection Facilities or WAPA s Electric System without the prior written authorization from WAPA. Any such modifications shall be completed in accordance with Good Engineering and Operating Practices and the Interconnection Standards. If Seller makes such modification without WAPA s prior written authorization, WAPA shall have the right to disconnect the Facility until Seller obtains WAPA s written authorization of the modification and to reconnect the Facility to WAPA s Electric System. 28