Bujumbura PV System Drawings.pdf

PDF 4 MB Posted Jul 31, 2026

Attached to: SOLAR PV PREVENTIVE MAINTENANCE SERVICES
Solicitation number: 19BY7026Q0009
Issued by: Department of State

About this file

Written by GovTribe AI · Jul 31, 2026

This document is a set of photovoltaic (PV) system design drawings and technical specifications for Project 92937, a multi-location solar installation project. The drawings detail the design and layout of PV arrays, inverters, transition boxes, conduit requirements, and electrical interconnections across five distinct locations: NOB (National Office Building), MSGQ, WHE (Warehouse Equipment), UTL (Utility), and a Parking Structure.

The PV system comprises multiple "Sunny Towers" with varying configurations across locations. NOB features Sunny Tower A (144 Sunpower SPR 320E modules with six SMC 7000HV-11 inverters) and Sunny Tower B (72 modules with three SMC 7000HV-11 inverters). MSGQ includes Sunny Tower A with three SMC 5000A inverters serving 48 modules. WHE contains Sunny Towers A, B, and C (each with 144 modules and six SMC 7000HV-11 inverters) plus wall-mounted inverters D1, D2, and D3 serving the Parking Structure. The Parking Structure includes two arrays of 48 modules each, powered by two SMC 7000HV-11 inverters. All systems use Sunpower SPR 320E-WHT-D modules with specifications of Voc=518V and Isc=6.24A, employing positive ground configuration. The design includes transition boxes (Wiley Electronics ACE Box units) converting PV wire to THWN-2 conductors with 20A fuses, exterior AC disconnects (Square D HU363RB rated 100A, 600VAC), and integration with existing building electrical distribution systems. Conduit and conductor specifications vary by location and circuit, ranging from ¾" RGS with #10 THWN-2 conductors for array circuits to larger 2" RGS with #1/0 THWN-2 for main AC circuits. A Data Acquisition System monitors performance through sensors installed on roofs and equipment rooms, communicating via CAT5 network cables and RS485 shielded twisted pair cables with specified maximum run lengths.

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Switchboard NOBSB-E

1000A, 400/230VAC

42kA Interrupt (Existing) Sheet E5-606

80A, 3P

40A, 3P

Tower A – Breaker 22

Tower B – Breaker 23

INV

Sunny Tower A Located on rooftop

Inverters are connected Phase to Neutral

Exterior AC Disconnect

Square D HU363RB

100A, 600VAC,

isolated neutral, NEMA 3R

(provided by others)

Sunny Tower “A” 6 x SMC 7000HV -11

Inverters (all used)

Sunny Tower “B” 6 x SMC 7000HV -11

Inverters (3 used / 3 spare)

Exterior AC Disconnect

Square D HU363RB

100A, 600VAC,

isolated neutral, NEMA 3R

(provided by others)

INV

Sunny Tower B Located on rooftop

INV

Array

6-PV wire 4 mm2, #8G bare

¾” RGS, 6#10 THWN-2, #8 EGC

2" RGS, 4#1/0 THWN-2, 1#6 G

Conduit & Conductor requirements Conduit & WireDescriptionLabel

B A

ESS

Transition Boxes @ PV Arrays

General notes:

-See sheet BE1.07 for PV array layouts & location -See sheet BE1.08 for Sunny towers, inverters, disconnects & DAS equipment layout -See sheet BE6.01 for Data Acquisition Plan

Sunny tower A configuration:

144 Sunpower SPR 320E-WHT-D PV Modules One array per inverter; Six arrays total Each array comprised of three strings of eight modules or 24 modules per inverter Voc =518V, Isc = 6.24A Location: rooftop Positive Ground

Sunny tower B configuration:

72 Sunpower SPR 320E-WHT-D PV Modules One array per inverter; Three arrays total Each array comprised of three strings of eight modules or 24 modules per inverter Voc = 518V, Isc = 6.24A Location: rooftop Positive Ground

To building electrical distribution system

NOBSG-E

2000A bus, CB#3, 1000A

NOBSG-E-U

‘CBA’

2000A

UTLSG-E

‘CBA’

3000A bus, CB#7, 2000A

UTLSG-E-U

‘CB1’

3000A

G Transformer

15kVΔ :400/230Y

2MVA

ESSESS ESS ESS ESS ESS ESS ESS

Transition Boxes @ PV Arrays

1000A

Wiley Electronics ACE Box

Transition box from module PV WIRE conductors to THWN-2 insulated conductors One transition box per inverter

Use 20A fuses

TO PV

MODULES

INVERTER

TRANSITION BOX DETAIL

To building electrical distribution system

- - - + + + EG

C C

SMC 7000HV -11 Inverters

PROJECT:

DESCRIPTION:

DWG BY: TSI CHK BY:

DATE: 07/18/11

SCALE: AS NOTED

SHEET No.

NOB

MPS

1 2 3

TRANSITION BOX A1

SUNNY TOWER ASUNNY TOWER B

TRANSITION BOX B3 TRANSITION BOX A2 TRANSITION BOX A3

TRANSITION BOX A4

TRANSITION BOX A5 TRANSITION BOX A6

TRANSITION BOX B2

TRANSITION BOX B1

SEE VIEW 1 BE1.08

TRANSITION BOX

@ PV ARRAY

MC-4

CONNECTOR

SCHEMATIC OF PV STRING WIRING

N.T.S.

BACKSIDE OF

SUNPOWER 320W MODULE

MC-4

CONNECTOR

MC-4

CONNECTOR

MC-4

CONNECTOR

MC-4

CONNECTOR

MC-4

CONNECTOR

MC-4

CONNECTOR

N.T.S.

NOB1

PROJECT:

DESCRIPTION:

DWG BY: TSI CHK BY:

DATE: 07/18/11

SCALE: AS NOTED

SHEET No.

Panelboard MDP

400A, 400/230VAC

25kA Interrupt (Existing) Sheet E6-602

30A, 3P

Inverter breakers 38, 40, 42

UTLSB-U

1600A bus, CB#1, 400A CB, 65kAIC

UTLSG-U

‘CB#11’

3000A bus, 1000A CB, 65kAIC

UTLSG-E-U

‘CB#3’

3000A bus, 3000A

G Transformer

15kVΔ :400/230Y

2MVA

Room MQ110

Sunny Tower A Located on rooftop

Exterior AC Disconnect

Square D HU363RB

100A, 600VAC,

isolated neutral, NEMA 3R

(provided by others)

Sunny Tower “A” 6 x SMC 5000A Inverters

(3 used/3 spare)

INV

ESS ESS ESS

Transition Boxes @ PV Arrays

Array

6-PV wire 4 mm2, #8G bare

¾” RGS, 6#10 THWN-2, #8 EGC

1 1/4" RGS, 4#4 THWN-2, 1#6 G

Conduit & Conductor requirements Conduit & WireDescriptionLabel

B A

General notes:

-See sheet BE2.07 for PV array layouts & location -See sheet BE2.08 for Sunny towers, inverters, disconnects & DAS equipment layout -See sheet BE6.01 for Data Acquisition Plan

Sunny tower A configuration:

48 Sunpower SPR 320E-WHT-D PV Modules One array per inverter; Three arrays total Each array comprised of 2 strings of eight modules or 16 modules per inverter Voc =518 , Isc = 6.24A Location: rooftop Positive Ground

400A

TRANSITION BOX DETAIL

To building electrical distribution system

Wiley Electronics ACE Box

Transition box from module PV WIRE conductors to THWN-2 insulated conductors One transition box per inverter

Use 20A fuses

TO PV

MODULES

INVERTER

- - - + + + EG

SMC 5000A Inverters

PROJECT:

DESCRIPTION:

DWG BY: TSI CHK BY:

DATE: 07/18/11

SCALE: AS NOTED

SHEET No.

MSGQ

12 111

222222211111111

2222222

THRU ROOF INTO STAIRWELL

1111 1111

22222222

EXTERIOR AC DISCONNECT

(TOWER "A")

A SEE BE2.08

SUNNY TOWER "A"

10'-111 4" [3333mm]

9'-41 8" [2849mm]

TRANSITION BOX A2

TRANSITION BOX A3

MAINTAIN 4' MIN. WORKING SPACE

PER NEC 2008 ARTICLE 110.26

TRANSITION BOX

@ PV ARRAY

MC-4

CONNECTOR

SCHEMATIC OF PV STRING WIRING

N.T.S.

BACKSIDE OF

SUNPOWER 320W MODULE

MC-4

CONNECTOR

MC-4

CONNECTOR

MC-4

CONNECTOR

MC-4

CONNECTOR

MC-4

CONNECTOR

MC-4

CONNECTOR

Scale: N.T.S.

MSGQ1

PROJECT:

DESCRIPTION:

DWG BY: TSI CHK BY:

DATE: 07/18/11

SCALE: AS NOTED

SHEET No.

MSGQ

INV

Sunny Tower B in elect.

room

INV

Sunny Tower C in elect.

room

INV

Sunny Tower A in elect.

room

INV

ESS

Transition Boxes @ PV Arrays

Switchboard WHU SEC2

800A, 400/230VAC

42kA Interrupt (Existing) Sheet E7-602

80A, 3P

800A

80A, 3P

Tower A – breaker 67, 69, 71

Tower B – breaker 73, 75, UTLSB-U

1600A bus, CB#5, 800A

UTLSG-U

‘CB3’

3000A bus, CB#3, 3000A

40A, 3P

80A, 3PTower C – breaker 79, 81, 83

Wall mounted inverters-breaker 74, 76, 78

40A, SP

AC Panel Board Square D NF418L1C 125A,3 ph, 400/230VAC MLO, NEMA 1

(provided by others)

40A, SP

G Transformer

15kVΔ :400/230Y

2MVA

Array

6-PV wire 4 mm2, #8G bare

¾” RGS, 6#10 THWN-2, #8 EGC

2" RGS, 4#1/0 THWN-2, #6 G

1 ¼” RGS, 4#4 THWN-2, #6 G

1" RGS, 6#8 THWN-2, #6 G

Conduit & Conductor requirements Conduit & WireDescriptionLabel

B A

C D E

C C

NOTE:

Inverters D2 & D3 are powered by PV arrays on the Parking Structure

General notes:

-See sheet BE3.07 for PV array layouts & location -See sheet BE3.08 for Sunny towers, inverters & disconnects.

-See sheet BE6.01 for Data Acquisition Plan

Sunny tower A,B,C configuration:

144 Sunpower SPR 320E-WHT-D PV Modules One array per inverter; Six arrays total Each array comprised of three strings of eight modules, or 24 modules per inverter Voc =518V, Isc = 6.24A Location: rooftop Positive Ground

Inverter D1 configuration:

24 Sunpower SPR 320E-WHT-D PV Modules One array per inverter; One array total Each array comprised of three strings of eight modules, or 24 modules per inverte Voc = 518, Isc = 6.24A Location: rooftop Positive Ground

ESS ESS ESS ESS ESS ESS ESS ESS ESS ESS ESS

ESS ESS ESS ESS ESS ESS ESS

Inverters D1, D2, D3 mounted on wall in elect. room of WHE

TRANSITION BOX DETAIL

ESS ESS

AC COMBINER PANEL DETAIL

N R S T G

To building electrical distribution system

SMC 7000HV -11 Inverters

SMC 7000HV -11 Inverters SMC 7000HV -11 Inverters

SMC 7000HV -11 Inverters

Wiley Electronics ACE Box

Transition box from module PV WIRE conductors to THWN-2 insulated conductors One transition box per inverter

Use 20A fuses

TO PV

MODULES

INVERTER

- - - + + + EG

PROJECT:

DESCRIPTION:

DWG BY: TSI CHK BY:

DATE: 07/18/11

SCALE: AS NOTED

SHEET No.

WHE

2 22

3 3

2 3

INVERTERS IN MEZZ. LEVEL ROOM

THRU ROOF INTO MEZZTHRU WALL INTO MEZZ

TRANSITION BOX C4 TRANSITION BOX C3 TRANSITION BOX C2

TRANSITION BOX C5TRANSITION BOX C6

TRANSITION BOX D1

TRANSITION BOX C1 TRANSITION BOX B6 TRANSITION BOX B5

TRANSITION BOX B3 TRANSITION BOX B4

TRANSITION

BOX B1

TRANSITION BOX A6 TRANSITION BOX A5 TRANSITION BOX A4 TRANSITION BOX A3 TRANSITION BOX A2

TRANSITION BOX A1

TRANSITION BOX B2

UNDERGROUND CONDUIT WITH

DC CONDUCTERS FROM PARKING CANOPY

EXTERIOR JUNCTION BOX FOR

TRANSITION FROM UNDERGROUND

TO ABOVE GROUND CONDUIT

TO BE FIELD LOCATED

TRANSITION BOX

@ PV ARRAY

MC-4

CONNECTOR

SCHEMATIC OF PV STRING WIRING

N.T.S.

BACKSIDE OF

SUNPOWER 320W MODULE

MC-4

CONNECTOR

MC-4

CONNECTOR

MC-4

CONNECTOR

MC-4

CONNECTOR

MC-4

CONNECTOR

MC-4

CONNECTOR

Scale: N.T.S.

WAREHOUSE1 PROJECT:

DESCRIPTION:

DWG BY: TSI CHK BY:

DATE: 07/18/11

SCALE: AS NOTED

SHEET No.

WHE

C breakers 74, 76, 78E

Use RGS conduit above ground. Convert to PVC conduit underground from Parking Canopy to WHE Building if allowed by electrical specifications

Under ground

Above ground

D2 D3

Transition Boxes @ PV Arrays

INV

40A, SP

AC Panel Board Square D NF418L1C 125A,3 ph, 400/230VAC MLO, NEMA 1

(provided by others)

40A, SP

ESS

Inverters D1, D2, D3 mounted on wall in elect. room of WHE

NOTE:

Inverter D1 powered by the modules on

Warehouse

ESS ESS

Array

6- PV Wire, 4mm2, #8G bare 3/4” RGS, 6#10 THWN-2, #8 EGC (above ground) 2” PVC, 6#8 THWN-2, #8 G (underground) -SINGLE CONDUIT 1” RGS, 6#10 THWN-2, #8 EGC (above ground) -TWO SEPERATE CONDUITS

1 1/2” RGS, 4#2 THWN-2, #6 G

1" RGS, 6#8 THWN-2, #6 G

Conduit & Conductor requirements Conduit & WireDescriptionLabel

B A

E F

Switchboard WHU SEC2

800A, 400/230VAC

42kA Interrupt (Existing) Sheet E7-602

80A, 3P

800A

80A, 3P

UTLSB-U

1600A bus, CB#5, 800A

UTLSG-U

‘CB3’

3000A bus, CB#3, 3000A

40A, 3P

80A, 3P

G Transformer

15kVΔ :400/230Y

2MVA

General notes:

-See sheet BE5.07 for PV array layouts & location -See sheet BE4.08 for Sunny towers, inverters & disconnects -See sheet BE6.01 for Data Acquisition Plan

Sunny tower D configuration:

48 Sunpower SPR 320E-WHT-D PV Modules One array per inverter; two arrays total Each array comprised of three strings of eight modules or 24 modules per inverter Voc = 518A , Isc = 6.24A Location: rooftop Positive Ground

TRANSITION BOX DETAIL

Transition from above ground RGS conduit to underground PVC conduit at Parking Canopy

Transition from above ground RGS conduit to underground PVC conduit at Parking Canopy Junction box to be field located

To building electrical distribution system

Wiley Electronics ACE Box

Transition box from module PV WIRE conductors to THWN-2 insulated conductors One transition box per inverter

Use 20A fuses

TO PV

MODULES

INVERTER

- - - + + + EG

SMC 7000HV -11 Inverters

SEPERATE CONDUITS

PROJECT:

DESCRIPTION:

DWG BY: TSI CHK BY:

DATE: 07/18/11

SCALE: AS NOTED

SHEET No.

PARKING STRUCTURE

2 x 34" RGS CONDUIT

THRU ROOF TO COLUMN BELOW

1 1 1 1 1 1 1 2 2

3 3 3 3 3 3 3

2 2 22 22

1 1 1 1 1 1 1 1

2 22 2 22 223 3 3 3 3 3 3 3

TRANSITION BOX D2

TRANSITION BOX D3

TRANSITION BOX

@ PV ARRAY

MC-4

CONNECTOR

SCHEMATIC OF PV STRING WIRING

N.T.S.

BACKSIDE OF

SUNPOWER 320W MODULE

MC-4

CONNECTOR

MC-4

CONNECTOR

MC-4

CONNECTOR

MC-4

CONNECTOR

MC-4

CONNECTOR

MC-4

CONNECTOR

Scale: N.T.S.

PARKING STRUCTURE1

PROJECT:

DESCRIPTION:

DWG BY: TSI CHK BY:

DATE: 07/18/11

SCALE: AS NOTED

SHEET No.

PARKING STRUCTURE

INV

Sunny Tower A in elect.

room

INV

ESS

Transition Boxes @ PV Arrays

ESSESS ESS ESS ESS

INV

ESS ESS ESS

Transition Boxes @ PV Arrays

Panelboard UBPU

400A, 400/230VAC

65kA Interrupt (Existing) Sheet E8-605

80A, 3P

30A, 3P

Tower A – breaker 19, 21, 23

Tower B – breaker 25, 27, 29

UTLSB-U

‘CB#2’

1600A bus, 400A

UTLSG-U

‘CB#11’

3000A bus, 1000A

UTLSG-E-U

‘CB2’

3000A

G Transformer

15kVΔ :400/230Y

2MVA

Electrical Room – UTL-101 tie in point

UTL-

AC Disconnect Square D HU363

100A, 600VAC, isolated neutral, NEMA 1

(provided by others) AC Disconnect Square D HU363

100A, 600VAC,

isolated neutral, NEMA 1 (provided by others)

30A, SP

AC Combiner Panel Square D NF418L1C

125 A, 230/400 VAC,

isolated neutral, NEMA 1 (provided by others)

30A, SP

Stand alone Inverters mounted on wall in elect.

room

Array

EGC

6-PV wire 6 mm2

¾” RGS, 6#10 THWN-2, #8 EGC

2" RGS, 4#1/0 THWN-2, #6 G

4" FMC, 2#8 THWN-2, #6 G FOR EACH INVERTER

4" RGS, 6#8 THWN-2, #6 G

#6 BARE COPPER, SEE DRAWING BE4.04

Conduit & Conductor requirements Conduit & WireDescriptionLabel

B A

C D

General notes:

-See sheet BE4.07 for PV array layouts & location -See sheet BE4.08 for Sunny towers, inverters & disconnects -See sheet BE.CD06 for Data Acquisition Plan

Sunny Tower A configuration:

144 SunpowerSPR 320E-WHT-D PV Modules One array per inverter; Six arrays total;

Each array comprised of three strings of eight modules or 24 modules per inverter Voc =518V, Isc = 6.24A Location: rooftop Positive Ground

Stand alone inverter (B1, B2 & B3) configuration:

48 Sunpower SPR 320E-WHT-D PV Modules One array per inverter; Two arrays total Each array comprised of 2 strings of eight modules or 16 modules per inverter Voc =518 , Isc = 6.24A Location: rooftop Positive Ground

400A

TRANSITION BOX DETAIL

AC COMBINER PANEL DETAIL

N R S T G

To building electrical distribution system

Wiley Electronics ACE Box

Transition box from module PV WIRE conductors to THWN-2 insulated conductors One transition box per inverter

TO PV

MODULES

INVERTER

- - - + + + EG

SMC 5000A InvertersSMC 7000HV -11 Inverters

Dots indicate insulated terminals to convert from THWN-2 to PV wire inside Sunny Towers.

Add Sunclix connectors to PV wire for ESS connection.

Dots indicate insulated terminals to convert from THWN-2 to PV wire inside Sunny Towers.

Add Sunclix connectors to PV wire for ESS connection. Wireway "B"

50A, SP BREAKERS ON "L"

L1 , L

2, L

3, N

, P E

L, N, PE

Wireway "B"

Individual conduits

FSingle Conduit

PROJECT:

DESCRIPTION:

DWG BY: TSI CHK BY:

DATE: 07/18/11

SCALE: AS NOTED

SHEET No.

UTIL

MPS

REVISED: 12/30/11 -ISSUE FOR CONSTRUCTION

ALL SCALES BASED ON FULL SIZED DRAWING 24"x36"

SUNNY TOWER "A"

WITH WEB BOX

INVERTER D1

SUNNY TOWER "B"

MSGQ

SUNNY TOWER "A"

WHE

SUNNY TOWER "A" SUNNY TOWER "B" SUNNY TOWER "C"

INVERTER D2 INVERTER D3

MEZZANINEROOFROOF

INVERTER B1

UTL

SUNNY TOWER "A"

INVERTER B2 INVERTER B3

ROOM 102

WIND

SENSOR

IRRADIANCE

SENSOR

AMBIENT

TEMP

MODULE

TEMP

SUNNY

SENSOR

POWER

INJECTOR

230V

AC OUTLET

NOB

LOBBY

ROUTER

SUNNY

MATRIX

DISPLAY

FTP FILE

SERVER

UPS

230V

AC OUTLET

DATA- CAT5 NETWORK CABLE, SHIELDED, TWISTED PAIR,

INSULATED, MINIMUM AWG #24,

MAX LENGTH BETWEEN WEB BOX AND ROUTER IS 100M

DATA- RS 485 CABLE, FOUR CONDUCTOR,

SHIELDED, TWISTED PAIR, UV RESISTANT,

MAX LENGTH BETWEEN DEVICES IS 1,200M

DATA- SAME AS B

MAX LENGTH BETWEEN POWER INJECTOR AND SENSOR BOX IS 150M

CABLES SUPPLIED WITH SENSOR KITSD

AC POWER CORD SUPPLIED WITH EQUIPMENTE

E A

B B

UTL ROOF

MAX LENGTH 1,200M

MAX LENGTH 1,200MMAX LENGTH 1,200M

NOTE:

ALL DATA COMMUNICATION CABLES TO BE INSTALLED

IN CONDUIT PER REQUIREMENTS OF ELECTRICAL SPECIFICATIONS

PROJECT:

DESCRIPTION:

DWG BY: TSI CHK BY:

DATE: 07/18/11

SCALE: AS NOTED

SHEET No.

DATA ACQUISITION SYSTEM

File details come from the government source that posted it. Updated Jul 31, 2026.