10 MWp Industrial Rooftop Solar | Engineering and PV Budget

10 MWp industrial solar: 10,000 kWp DC, 8,375 kW AC, 15,625 LONGi modules. English PV/LV reference BOQ has 78 lines; MV/EPC totals require separate verification.

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QUANGANHCONS | INDUSTRIAL EPC ENGINEERING

Industrial rooftop PV 10 MWp: equipment and EPC reference

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

QAC-SOL-EST-20261109-5A560DF4 · QAC Solar 8.21.0

10,000 kWpPV DC nameplate
8,375 kWTotal inverter AC
15,625 modulesLONGi 640 Wp modules

1. Applications and self-consumption

This is a multi-block industrial-scale solar development. Engineering must include multiple step-up units, MV feeders, protection selectivity, SCADA/EMS, metering and the grid-interface scope; never one 400 V main board. This is a PV self-consumption reference without battery storage, not a surveyed or previously built project.

2. Equipment nameplate and electrical configuration

Nominal capacity class 10 MWp
PV module 15,625 × LONGi Solar LR7-72HVH-640M, 640 Wp each
Installed DC 10,000 kWp
Inverters 67 × Sungrow SG125CX-P2
Combined AC 8,375 kW across 14 provisional groups
Strings 869, with MPPT allocation requiring verification
DC/AC ratio 1.19
Common VI/EN budget reference QAC-SOL-EST-20261109-5A560DF4 · 09 Nov 2026

3. Engineering calculations

PDC = 15,625 × 640 / 1,000 = 10,000 kWp. DC/AC = 10,000 / 8,375 = 1.19. Check module temperature, MPPT operating window, input currents, inverter derating, clipping and lightning protection on the actual topology.

Aggregate 400 V three-phase current at assumed PF 0.99 = 8,375 × 1,000/(√3 × 400 × 0.99) ≈ 12,210.38 A. This is not a permissible single-board design. It must be divided among real inverter feeders, protected collector boards and (where required) MV step-up sections.

4. Roof, protection and grid interface

Roof strength, wind anchoring, waterproofing, walkways, cable routes, fault-level study, feeder grading, protection relays, PCC metering, anti-islanding and zero-export controls need separate checks. The step-up stations, protected medium-voltage feeder network, remote control and utility interface have NOT been established by this LV-only snapshot.

5. Programme and acceptance

Prepare WBS: site survey and conceptual single-line diagram → engineering, utility and protection coordination → equipment procurement → phased safe PV installation → LV/MV and commissioning works where within contract → protection/insulation/earthing checks → as-built records and handover. Detailed durations depend on site, supplier lead time and approvals.

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. 10 MWp Solar estimate — view and download

Quote reference: QAC-SOL-EST-20261109-5A560DF4 · QAC Solar 8.21.0 · Pre-survey reference

Before VAT: 120,000,000,000 đ · Illustrative VAT 10%: 12,000,000,000 đ · With VAT: 132,000,000,000 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 1,039,735 915,872 123,863 2,515,180
2 1,203,679 1,037,456 166,223 2,299,440
3 1,403,179 1,215,564 187,614 2,568,780
4 1,270,934 1,100,318 170,616 2,425,400
5 1,178,108 1,076,075 102,034 2,568,780
6 1,024,202 934,992 89,210 2,479,000
7 961,687 881,868 79,819 2,515,180
8 1,193,153 1,074,314 118,839 2,568,780
9 970,054 899,270 70,785 2,479,000
10 1,069,039 952,889 116,151 2,515,180
11 1,052,472 935,191 117,282 2,479,000
12 1,150,729 1,025,438 125,292 2,515,180

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 1,507.5 0
1 0 1,507.5 0
2 0 1,507.5 0
3 0 1,507.5 0
4 0 1,507.5 0
5 0 1,507.5 0
6 304.4 1,507.5 304.4
7 2,240.2 3,768.8 2,240.2
8 4,047.9 6,281.3 4,047.9
9 5,687.3 6,281.3 5,687.3
10 6,533 6,281.3 6,281.3
11 6,923.4 6,281.3 6,281.3
12 6,851.9 4,187.5 4,187.5
13 4,366 6,281.3 4,366
14 3,776.5 6,281.3 3,776.5
15 2,853.5 6,281.3 2,853.5
16 1,683.7 6,281.3 1,683.7
17 384.1 6,281.3 384.1
18 0 2,931.3 0
19 0 2,931.3 0
20 0 2,931.3 0
21 0 2,931.3 0
22 0 1,507.5 0
23 0 1,507.5 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-connection rules. Module datasheet: LONGi LR7-72HVH. Inverter and relay selection must follow correct manufacturer revisions.

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

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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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