Buj_SOW PV System Upgrade V 1.0 - May 2024.docx

Embassy of the United States of America Bujumbura, Burundi

STATEMENT OF WORK

For

NEC SOLAR PHOTOVOLTAIC SYSTEM UPGRADE

24-Jul-2024

Statement of Work for Solar PV System Upgrade Project at NEC, US Embassy Burundi, Bujumbura

1.0 SUMMARY

The US Embassy in Bujumbura, Burundi, has requirements for drilling a new well to Upgrade the existing Solar PV system. The objective is to have a fully functioning solar PV System to the New Embassy Compound (NEC). In accordance with the terms and conditions set forth below, the Contractor will furnish all supervision, labor, management, facilities, supplies, equipment and material, and all required services necessary for the performance of the work. The Contractor will provide the required services to the U.S. Government as described in the requirements below.

2.0 REQUIREMENTS & DESCRIPTION

2.1 The existing PV system at the Embassy of the United States in Bujumbura, Burundi was built in 2012. It’s a 307.2 kW STC DC photovoltaic (PV) system. The system consists of follow sections:

2.1.1 NOB – 9 x SMA SMC 7000HV-11 Inverters and 69.12 kW PV Array consisting of 216 x 320W Sun Power modules.

2.1.2 MSGQ – 3 x SMA SMC 5000A Inverters and 15.36 kW PV Array consisting of 48 x 320W Sun Power modules.

2.1.3 WHE – 21 x SMA SMC 7000HV-11 Inverters and 161.28 kW PV Array consisting of 504 x 320W Sun Power modules.

2.1.4 UTL - 6 x SMA SMC 7000HV-11 & 3 x SMA SMC 5000A Inverters and 61.44 kW PV Array consisting of 192 x 320W Sun Power modules.

2.1.5 Other key components are:

a. SMA Power Reducer Box

b. SMA Webboxes - x 3

c. Data Acquisition System (DAS)

d. Mango ES Micro Grid Controller

e. Power Injector

f. Sunny Tower ST6 – x 3

g. Weather Station consisting of

i. Sunny Sensor Box,

ii. Wind Speed Sensor,

iii. Ambient Temperature,

iv. Module Cell Temperature &

v. Irradiance Sensor.

2.2 This project is for the assessment of all existing PV systems, the removal and replacement of all inverters, replacement of damaged PV Modules as needed, replacement of the weather station and recommissioning the upgraded PV System.

3.0 SITE DESCRIPTION

The Work will be conducted at the Embassy of the United States in Bujumbura, Burundi: No. 50 Avenue Des Etats Unis, 110-01-02.

4.0 MAJOR PROJECT ELEMENTS INCLUDED IN THIS CONTRACT

4.1 Construction Intent and Shop Drawings:

Contractor shall submit their understanding of the scope of work, proposed Single Line Drawings (SLDs), shop drawings, equipment cut sheets and calculations for approval.

4.2 Inverter Removal & Replacement:

4.2.1 Contractor shall supply five (5) string-type SMA Inverters [one (4) SMA SMC 7000HV-11 and one (1) SMA SMC 5000A]. The new inverters shall be SMA brand in order for communications to be compatible with existing SMA equipment installed per Section 2.1.

4.2.2 Contractor shall gather all PV production history data from existing inverters and from existing DAS system.

4..2.3 Contractor shall inspect, test, and analyze all 42 installed inverters and replace inoperable/irreparable inverters. If inverter replacement exceeds the 5 count in Section 4.2.1 or current existing 4 SMA SMC 7000HV-11spares, notify the COR. The contractor shall first utilize existing 4 spare inverters before using the newly supplied ones. Contractor shall ensure power production, synchronization, and communication capabilities of inverters after the replacements.

4.2.4 The contractor shall provide the excess inverters [the remainder of the five (5)] to Facilities as warehouse stock spares. The contractor shall dispose the removed inverters.

4..2.5 Contractor shall update cabling, connectors, and Balance of System (BOS) as necessary for a complete and functional system.

4.2.6 The installed system shall effectively create a single system under the control of the control system, contributing to power, and reporting to the DAS.

4.2.7 The new inverters shall function with the existing Mango ES Micro Grid Controller as originally intended for generator and utility integration.

4.3 Communications Upgrades:

4.3.1 Contractor shall supply three (3) SMA Sunny Webboxes compatible with compatible with existing SMA equipment installed per Section 2.1.

4.3.2 Contractor shall inspect, test, and analyze the existing communications system at device level, including all 3 existing Webboxes and cabling. Existing inoperable/irreparable SMA Sunny Webbox shall be removed and replaced with new SMA Sunny Webboxes. The contractor shall provide the excess Webboxes [the remainder of the three (3)] to Facilities as warehouse stock spares. The contractor shall dispose the removed SMA Sunny Webboxes.

4.3.3 Contractor shall ensure that all installed inverters, weather station and related equipment must connect to the SMA Sunny Webboxes. Connection of existing inverters and/or weather station may require additional communications equipment or retrofits for compatibility between old RS485 communications and new Speed Wire communications, such as SMA Com Gateways, or communication card upgrades to existing SMA Sunny inverters.

4.3.4 Contractor shall provide internet connection via DIN line to SMA Sunny Webboxes and setup transmission to SMA Sunny Portal. The contractor will be responsible for pulling cable and making connections to existing infrastructure as directed by Embassy IT staff.

4.3.5 Contractor must transfer all PV production history data gathered per Section 4.2.2. to SMA’s Sunny Portal.

4.3.6 Contractor shall commission and set up the hybrid controller, DAS, and web-portal.

4.3.7 Finished system shall have all the old and new inverters and weather stations transmitting to SMA’s Sunny Portal.

4.3.8 The Contractor shall provide a means for monitoring the PV system online (remote monitoring). This includes, but not limited to, cable infrastructure connecting all inverters, conduit and raceway, routing of individual communication lines to USG provided router and configuration of the system in the online portal (e.g. SMA sunny portal).

4.3.9 The USG provided router is located in the utility building.

4.4 PV Module Replacement:

4.4.1 Contractor shall inspect, test, and analyze all PV Modules with a bid of replacing 30 (320W) PV Modules.

4.4.2 Test procedures to be used include, but not limited to,

a. imaging and heat signature,

b. visual checks for physical damage of glass (cracking,

c. breakage, and de-lamination),

d. individual module testing for open circuit and

c. short circuit response.

4.4.3 The contractor shall first utilize existing 31 spare 320W PV Modules before using the newly supplied ones. Any required replacements of PV Modules over the required 30 shall be identified to the COR immediately.

4.4.4 Additional replacement requirements will be evaluated by COR after award.

4.4.5 The contractor shall provide the excess PV Modules (the remainder of the 30) to Facilities as warehouse stock spares. The contractor shall dispose the removed PV Modules.

4.5 Weather Station Replacement:

4.5.1 Contractor shall replace the weather station which consists of Irradiation Sensor, Ambient Temperature Sensor, Module Cell Temperature & Wind Speed Sensor.

4.5.2 Contractor shall provide any required cabling and commissioning for the weather station to be fully integrated in the complete system.

4.5.3 The contractor shall dispose the removed Weather Station.

4.6 Local Staff Operations & Maintenance onsite Training:

4.6.1 Contractor shall train local staff on the existing and new equipment Operation and Maintenance of the Solar PV System for at least two (2) days.

4.6.2 These shall be two 8-hour sessions split between theory and hands-on in the field training. This training shall include:

i. Procedures for verifying correct system operation.

ii. Emergency shutdown / isolation procedures.

iii. Visual Checks/Inspections, Maintenance & cleaning recommendations (if any), including which tasks should be performed by qualified professionals & which can be done by the owner or caretaker.

iv. Considerations for any future building works related to the PV array (ex: roof works).

v. Warranty documentation for PV modules & inverters - to include starting date & period of warranty.

vi. Documentation on any applicable workmanship, weather-tightness warranties, &/or performance warranties.

vii. Alarm and fault checking

viii. Using the appropriate tools and testing equipment for scheduled maintenance, safety inspection, and safety testing.

ix. The upgraded Solar System layout

x. Important O&M checklists, processes, and procedures

xi. Locations of AC/DC disconnects.

xii. Inverter operation

xiii. Cleaning the PV modules

xiv. Monitoring system operation (including relevant passwords & URLs for web-based systems)

xv. Sunny Webbox interface and operation

xvi. Mango ES Micro Grid Controller interface and operation

xvii. Rapid Shutdown Device operations and maintenance, if CLIN 0009 is exercised.

xviii. Power Optimizer operations and maintenance if option CLIN 0011 is exercised.

xix. Documentation (manuals, warranties, contracts)

xx. Maintenance schedule (Daily, weekly, monthly, quarterly, semi-annually, annually)

4.7 Recommissioning the upgraded solar system & preparing a report with findings and recommendations:

Minor/trivial NEC code violations are expected and to be remedied by the contractor. The contractor shall immediately notify the COR of any existing condition deviations or non-trivial NEC code violations. The contractor shall recommission the complete upgraded solar system to identify any deficiencies, noting improvements thus far and preparing a report with findings and recommendations.

4.8 Rapid Shutdown Device Installation:

Contractor shall supply and install Rapid Shutdown Devices (RSDs) for 960 PV Modules for quickly de-energizing DC circuitry from the PV panels to the inverters when an emergency occurs to ensure that the solar system complies with electrical safety requirements for solar PV panel systems as per National Electrical Code (NEC) article 690.12. The RSDs shall be installed in the NOB, UTL, WHE and MSGQ buildings to RSD reduce shock hazard for emergency responders. The contractor shall supply an additional 5% spare RSDs to Facilities as warehouse stock spares.

4.9 Power Optimizers Installation:

Contractor shall supply and install Power Optimizers (POs) for 960 PV Modules to increase the output efficiency and performance of each PV Module at the individual level in order to maximize the energy harvest from PV System. The contractor shall supply an additional 5% spare POs to Facilities as warehouse stock spares.

5.0 PROJECT WORK SPECIFICS

5.1 The design must include full sets of stamped and sealed drawings (by registered professional Engineers and/or Architects), calculations (stamped by licensed Engineer), PV power production simulations, and specifications, following 2022 OBO Design Standards. (See Section J.3).

5.2 OBO REQUIRES THE CONTRACTOR TO COMPLETE THE FOLLOWING:

5.2.1 Design and Construction Requirements for MAJOR PROJECT ELEMENTS INCLUDED IN THIS CONTRACT IN SECTION 4.0

5.2.1.1 Contractor must provide all equipment, labor, and materials necessary to complete the installation and activation of operational photovoltaic systems connected to and integrated with the existing electrical and diesel generation systems. The contractor must provide any exterior mounted balance of system components including modules, cable management, combiner boxes, fuse blocks and fuses, conduit, cabling, inverters, and AC combiner panelboards found to be deficient in the original installations. This equipment must be designed and installed to minimize the visual impact. The contractor must also ensure the system’s ease of operation and maintenance. Inverters must be capable of integrating to the existing utility system as well as coordinate with the generator operation of the facility. Inverters must be string type. Power line filters must be provided and coordinated with the switching frequency of the inverters. The contractor must measure all ground currents prior to PV installation and provide documentation of observed ground currents to the COR. Upon completed installation, the contractor must measure all ground currents to ensure proper functionality of the grounding system.

5.2.1.2 Contractor must provide for and make the final connection to the switchboard/panelboard. It must be the responsibility of the contractor to determine a viable path for the power feeder and DAS wiring from the PV system. If using underground routing, provide underground conduit and cabling with hand-holes and pull boxes. The installation of these underground ducts may require selective removal and replacement of existing concrete, walkways, curbs, asphalt roadways, and penetration of existing concrete walls. The contractor must limit the cutting of existing paved areas to 90-degree crossings. Contractor must patch, re-stripe, and reconstruct curb and gutter in affected paved areas to match existing adjacent conditions.

5.2.1.3 Contractor must restore landscaping and irrigation system impacted by construction activities, to meet or exceed pre-construction conditions.

5.2.1.4 Contractor must provide a design in accordance with the 2022 OBO Design Standards, and Code Supplements (See Section J.3) and meet all the requirements of section 8.0 of this Statement of Work.

6.0 CONTRACTOR RESPONSIBILITIES

6.1 Contractor must coordinate with the Regional Security Officer (RSO), Management Officer (MO) and/or Contract Officer Representative (COR) prior to commencement of work to determine security procedures and protocols for visits during design and construction operations and in accordance with Division 1. The contractor must also follow all provisions identified in the Security Classifications Guidelines for handling and marking of documents and materials.

6.2 Design Personnel Qualifications:

6.2.1 Registered Professionals

6.2.1.1 Electrical Engineering

6.3 Provide the following specialist expertise with a minimum of five years of documented experience in the area of expertise:

6.3.1 Photovoltaic (PV) system design

6.4 All field conditions must be verified by the contractor at the contractor’s risk.

6.5 Meetings

6.5.1 The Contractor must document and submit a record of all conferences and meetings with representatives of the Post related to the Project. Copies must be submitted to COR both in electronic form and in hard copy within 7 calendar days of the meeting.

7.0 SITE VISIT / DESIGN SURVEY

7.1 Contractor must under no circumstances incur any travel or other costs or begin travel to the site or work at site until a cable granting country clearance is received.

7.2 During the site survey, the successful contractor must survey the areas where construction will take place and become thoroughly familiarized with the existing conditions and other factors that will affect construction. Contractor must ascertain all local permit requirements, licensing requirements, and the quality and availability of materials, sub-contractors, and equipment that may be needed to execute the contract; highlight any variances with information provided (for verification) in the contract; and propose any required action(s).

7.3 Contractor to inspect and evaluate all available surveys, drawings, and reports pertaining to the project or the existing conditions to familiarize themselves fully with the project.

8.0 CONSTRUCTION DOCUMENTS

8.1 The following phases will occur for construction document submissions.

8.1.1 Construction Intent and Shop Drawings

8.2 All submittals to OBO must be reviewed by the Contractor for conformance to specified requirements prior to submittal. The Contractor must take particular care to ensure that all design documents are coordinated between all disciplines and consistent. OBO authored comments on each submittal must be resolved prior to making the next submittal. Deficiencies, ambiguities, conflicts, and inconsistencies must be rectified prior to the submittal of documents. Any phase of the work found to be unsatisfactory, in the opinion of the COR, must be revised and resubmitted at the Contractor’s expense prior to proceeding to the next phase of the work.

8.3 Contractor must submit all drawings to the COR for approval prior to releasing drawings to local permitting and/or licensing agencies for any permits.

8.4 Drawings to be released for local permitting and/or licensing agencies must be labeled using generic terminology (e.g., office, restroom, mechanical space).

8.5 Contractor must abide by the 2022 OBO Design Standards for generic drawing requirements and formats.

8.6 Construction Documents submitted to the Government must include:

8.6.1 Drawings

8.6.1.1 Provide plans, details, and/or cross-sections of the proposed work, as necessary to explain/illustrate the project. Details must indicate the differences between existing and proposed conditions.

i. Electrical

· Electrical Floor Plans @ 1:100 (minimum) showing existing electrical equipment locations, and locations of electrical equipment to be removed, new work.

· Single line diagram showing conductor sizes and estimated lengths, conduit or raceway type and sizes, equipment ratings and sizes, overcorrect protection ratings for all feeders (new and existing)

· Panel schedules, all existing and new circuits with breaker sizes and estimated loads.

· Schedules

· Grounding and bonding details

· Catalog Cuts

8.6.2 Specifications

Specifications must delineate all equipment, materials, finishes and installation methods to be used. The specifications must be submitted in the MasterSpec format. Standard specifications maintained by OBO are provided in Section J.2 and must be used and followed for the materials where specifications are provided. The contractor must delete the non-applicable specifications within the design standards. The specifications may be edited; however, the edits must be tracked and submitted for the Construction Intent and Shop Drawings.

8.6.3 Shop Drawing submission. The Construction Intent and Shop Drawings submission may be documents with tracked changes; however, no additional changes may be made after acceptance.

8.6.4 Catalog Cutsheets

8.6.4.1 Identify all materials and products to be used. The specific manufacturer and model number used as the basis of design must be listed for each item. Include maintenance and warranty information.

8.6.5 Design Calculations

8.6.5.1 Electrical

i. Short circuit analysis and fault current analysis of selected equipment coordinated with existing electrical system (infinite utility).

ii. Load flow calculations identifying all loads in each installation’s building, and schedule for those loads.

iii. PV system production simulation reports. Reports must include all actual losses including wiring, near shading, and far shading (horizon) using PVSYST or other software capable of accurately incorporating these losses.

8.6.6 OBO Standard Specifications Divisions serve as templates for preparation of the project’s construction specifications. The contractor must develop additional specifications using MasterSpec to supplement the OBO standard specifications. The specification sections provided with the SOW or RFP are an inclusive set of OBO specifications. All specifications must be tailored and formatted for the project. All specifications must be coordinated for content and references.

8.6.7 The contractor must design the project in accordance with the standards and guidelines outlined below:

8.6.7.1 2022 OBO Code Supplements (Section J.2.1.1)

8.6.8 Any code issues arising from the review of codes and standards will be brought to the attention of COR immediately.

9.0 CONSTRUCTION SERVICES

9.1 The Contractor must cover the cost of escort for non-cleared workers, if used, subject to the approval of the RSO.

9.2 All materials and equipment incorporated into the project must be new or government owned. The Contractor must transport and safeguard all materials and equipment required for construction.

9.3 The Contractor must at all times keep the work area free from accumulation of waste materials. Upon completing construction, the Contractor must remove all temporary facilities and leave the project site in a clean and orderly condition acceptable to Post. Any repair of damage caused as a result of this project will be the responsibility of the Contractor.

9.4 The contractor must ensure that all facilities receiving this work must be left in a condition acceptable to OBO and the US Embassy upon completion.

9.5 Planned Service Interruptions: The contractor must additionally notify the GSO and COR in writing three (3) calendar days prior to any planned electrical outages in lieu of the two-week prior notification. Notification must include the loads within the facility to be affected by the outage and the hours and dates of interruptions. The contractor must schedule work to maintain flexibility since interruptions may not be granted on the date(s) requested. Electrical shutdowns and operation of electrical breakers and switches must be accomplished only by qualified personnel and upon advance approval of the GSO and COR. Where fire protection, detection, or evacuation alarms are affected, advance written approval of the GSO and COR must be obtained. Proper lock out/tag out procedures should be followed to maximize safety; the contractor must supply lock out/tag out materials. Power is to be maintained to all existing operational/connected loads during the construction period of the project.

SECTION J - LIST OF ATTACHMENTS

J.1 ADMINISTRATIVE DOCUMENTS

J.1.1 U.S. Department of State Bureau of Diplomatic Security (DS) Security Classification Guide for Design and Construction of Overseas Facilities (May 2003) J.1.2 DOS Contractor’s Release Certificate (Apr 1978) J.1.3 Not Used J.1.4 Breakdown of Proposal Price: DS 1165C – Contractors shall add additional fields to cover the design phases and any other missing disciplines J.1.5Sample Irrevocable Letter of Credit J.1.6 Form DS-1037, “Mailing List Application for Construction Contracts” Attachment A to DS-1037, “Certification Statements” J.1.7 ACH Vendor/Miscellaneous Payment Enrollment Form (Dec 1990) J.1.8 OBO Uniformat Building Element Classification System (Feb 2005) J.1.9 Contract Security Classification Specification (DD Form 254) [Paper document issued with transmittal letter] J.1.10 Contractor Accreditation Worksheet (Apr 2007) J.1.11 Material Product Substitution Form (Apr 2005) J.1.12 System for Award Management Maintenance (SAM’s); Registration Help Sheets J.1.13 Final Payment Release Form

J.2 STANDARD DESIGN REQUIREMENTS

J.2.1 2022 Overseas Buildings Operations “OBO Design Standards”

J.3 PROJECT SPECIFIC REQUIREMENTS – SPECIFICATIONS AND DRAWINGS

J.3.1 U.S. Embassy – Bujumbura, Burundi – Solar System One Line As-Built Drawings, Dated May 2011, Sensitive But Unclassified J.3.2. U.S. Embassy – Bujumbura, Burundi – Photovoltaic (PV) System Site Visit Report, Dated February 2017, Sensitive But Unclassified

END OF STATEMENT OF WORK

UNCLASSIFIED

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