150 kWp Industrial Rooftop Solar | EPC Design and Budget

Industrial rooftop PV 150 kWp: 150.4 kWp DC, 125 kW AC, 235 LONGi modules, 78-line English budget BOQ. Indicative pre-survey estimate only.

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QUANGANHCONS | INDUSTRIAL EPC ENGINEERING

Industrial rooftop PV 150 kWp: equipment and EPC reference

A structured technical reference for factories evaluating rooftop PV, site electrical interfaces and EPC budgets.

QAC-SOL-EST-20261109-3EFF6678 · QAC Solar 8.21.0

150.4 kWpPV DC nameplate
125 kWTotal inverter AC
235 modulesLONGi 640 Wp modules

1. Applications and self-consumption

Final parameters depend on the actual site load, approved PCC topology, roof structure and installation routes.

2. Equipment nameplate and electrical configuration

Industrial PV on factory rooftops; verify the existing 400 V board, inverter feeder and export-limiting CT at the actual PCC. The purpose is to help factory owners review a self-consumption, grid-connected solar PV concept without battery storage. It is not evidence of a completed project or a utility-approved design.

DC 150.4 kWp
AC 125 kW
Modules 235 × 640 Wp

3. Engineering calculations

DC capacity = 235 × 640/1,000 = 150.4 kWp. DC/AC ratio = 150.4/125 = 1.2. Check inverter clipping, MPPT loading and temperature-adjusted string voltages with the actual datasheet.

Three-phase aggregate AC current at 400 V and assumed power factor 0.99: I = 125 × 1,000/(√3 × 400 × 0.99) ≈ 182.24 A, a mathematical aggregate only, not a single switchboard feeder selection. Confirm inverter maximum AC current, cable ampacity and fault-duty requirements independently.

4. Roof, protection and grid interface

Verify Voc at minimum cell temperature, Vmp at maximum cell temperature, string current per MPPT, DC isolators, SPD, AC fault current, feeder discrimination, earthing, roof anchoring, wind uplift, waterproofing, emergency access and safe commissioning. The utility PCC, transformer/MSB capacity and site demand profile must be confirmed before procurement or construction.

5. Programme and acceptance

Site survey → design and PCC protection review → procurement approval → safe roof preparation and PV/DC/AC installation → commissioning of protection, insulation, earthing and export-limiting controls → as-built documentation, operating instructions and handover. WBS durations and dependencies require a project-specific site baseline.

Indicative WBS/Gantt (no fixed dates)

1. Demand monitoring and survey

2. Electrical/PCC and roof design

3. Purchasing and HSE

4. Rooftop installation/DC/AC wiring

5. Commissioning and handover

6. 150 kWp Solar estimate — view and download

Quote reference: QAC-SOL-EST-20261109-3EFF6678 · QAC Solar 8.21.0 · Pre-survey reference

Before VAT: 1,804,800,000 đ · Illustrative VAT 10%: 180,480,000 đ · With VAT: 1,985,280,000 đ

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Preview matching source-locked PDF below. This is a preliminary budget; unit prices can be rounded and the actual utility/MV scope requires independent verification.

7. 12-month production and a representative 24-hour day

Example only, not surveyed production or measured load: PVGIS 5.3/ERA5 2023 HCMC (10.8231,106.6297), 10° south-facing, PVGIS loss 14% once, AC limits applied per configuration. Hypothetical factory operates Mon–Sat: 75% AC daytime load, 50% lunch, 35% evening, 18% overnight/Sundays; zero export assumed.

Monthly energy (kWh)Monthly energy (kWh) — Available PV, Direct PV self-use
Month Available PV Direct PV self-use
Month PV kWh Self-use kWh Curtailed kWh Load kWh
1 15,638 13,755 1,882 37,540
2 18,103 15,570 2,533 34,320
3 21,104 18,236 2,867 38,340
4 19,115 16,522 2,593 36,200
5 17,719 16,166 1,553 38,340
6 15,404 14,049 1,355 37,000
7 14,464 13,249 1,215 37,540
8 17,945 16,140 1,805 38,340
9 14,590 13,514 1,076 37,000
10 16,078 14,316 1,763 37,540
11 15,829 14,047 1,782 37,000
12 17,307 15,402 1,905 37,540

Representative day: 15 Mar 2023

Power over 24 hours (kW)Power over 24 hours (kW) — PV output, Assumed factory load, Direct PV self-use
Hour (UTC+7) PV output Assumed factory load Direct PV self-use
Show 24-hour loads and assumptions
Hour ICT PV kW Load kW Self-use kW
0 0 22.5 0
1 0 22.5 0
2 0 22.5 0
3 0 22.5 0
4 0 22.5 0
5 0 22.5 0
6 4.6 22.5 4.6
7 33.7 56.3 33.7
8 60.9 93.8 60.9
9 85.5 93.8 85.5
10 98.3 93.8 93.8
11 104.1 93.8 93.8
12 103.1 62.5 62.5
13 65.7 93.8 65.7
14 56.8 93.8 56.8
15 42.9 93.8 42.9
16 25.3 93.8 25.3
17 5.8 93.8 5.8
18 0 43.8 0
19 0 43.8 0
20 0 43.8 0
21 0 43.8 0
22 0 22.5 0
23 0 22.5 0

JRC PVGIS 5.3 ERA5 2023 · QAC-SOLAR-INDUSTRIAL-HCM-2023-R1

8. Rooftop PV installation and equipment images

Images already in the QAC content library; not photographs of this exact system.

Industrial PV reference image 1
Industrial PV reference image 2
Industrial PV reference image 3

9. Standards, checkpoints and FAQ

Assess IEC 62548-1, IEC 60364-7-712 and applicable Vietnamese electrical, structural, fire and grid rules. LONGi PV module datasheet is an equipment reference, not a design approval.

Standalone English searchable PDF and formula-backed Excel for QAC-SOL-EST-20261109-3EFF6678 will only be linked after the VI/EN single-snapshot and site engineering checks pass. The full itemised BOQ is available for online reading in the table above.

Read the Vietnamese reference profile or the existing bilingual estimate PDF library.

Confirm MPPT and cold Voc/Isc, AC/DC SPD and selectivity, earthing, roof/wind, utility interface and fire safety before construction.

Is this a final turnkey MV EPC quotation?

No. Only the priced BOQ scope is included. MV collector, new substation and PCC upgrades must be validated separately.

10. Construction video and related solutions

Watch PV installation video on YouTube

Video reference only, not project-completion evidence.

Industrial rooftop solar · Solar estimate library · Substation services

11. Estimate another solar system

QUANGANHCONS · SOLAR EPC

Choose Solar & storage for your property

From electricity needs to a preliminary system and budget. No contact details required.

Technical settings & supply scope

Preliminary defaults are selected. Adjust the roof, equipment, connection and cable routes here.

Battery energy storage (optional)

Capacity is rounded to whole modules/cabinets. Backup defaults: SOC 90% to 10%, SOH 90%, discharge efficiency 95%, power derating 10%. Adjust these assumptions through the assistant when data is available. Backup is priced separately; compatibility and transfer time remain unverified.

Scope and budget basis

Preliminary quantities and rates follow the entered configuration and require survey/design confirmation. Basic scope includes standard rails, clamps and module attachments on a suitable existing structure. Select raised frames, foundations, reinforcement, storage or a new transformer to price additions.

Roof height is measured from ground; rack clearance is separate, above the roof/ground surface. Area and row pitch are layout estimates, not approved drawings or wind, structural, waterproofing or fire assessments. VAT follows the quote configuration and requires contract/invoice confirmation.

Automatic pre-survey calculations

Enter your sizing input to see module area, access area, roof requirement, module mass, capacity and electrical configuration.

Developed and operated by QuangAnhcons. Preliminary results require site survey and written confirmation before ordering or construction.

Solar 8.21.0 · QAC-UI-QUOTE 1.1.1

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