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QUANGANHCONS · SOLAR ENERGY · FACTORIES & COMMERCIAL BUILDINGS
Industrial Solar Rooftop EPC in Vietnam
Turn roof space and daytime demand into an investable solar project.
What this service covers
QuangAnhcons provides solar electrical engineering, procurement and construction services for factories, warehouses and commercial facilities in Vietnam. Start with electricity consumption and usable roof area, compare a preliminary configuration, then confirm structural suitability, connection conditions and a project-specific bill of quantities.
Discuss your project in English with our team. Our priority delivery area is Southern Vietnam; project location, access and mobilization are confirmed during quotation.
A defined scope from design to handover
Feasibility and system design
Review bills and interval demand, shading, roof drawings, access, inverter locations and electrical capacity. Compare self-consumption, export-limited and storage-ready options against the actual operating pattern.
Procurement and construction
Agree module and inverter specifications, mounting design, cable schedules, protective devices, monitoring and installation methods. Coordinate structural and fire-safety work with the responsible specialists.
Grid and factory integration
Define the point of common coupling, metering, export control, transformer loading, protection interfaces and shutdown windows. Coordinate connection submissions where included in the contract.
Commissioning and handover
Inspect and test the installed system, demonstrate monitoring and alarms, document the as-built arrangement and train the operating team. Record outstanding items before acceptance.
Engineering decisions that shape your project
Capacity: separate kWp DC from kW AC
PV capacity in kWp is the sum of module nameplate ratings under standard test conditions. Inverter kW AC is the conversion capacity. Their ratio affects clipping and inverter utilization; it is not a fixed rule for every roof. Usable area must exclude access corridors, roof edges, skylights, equipment and shaded zones.
Energy and savings: use a transparent model
Annual energy can be screened as E = P_DC × Y_specific. In an illustrative case, 500 kWp × 1,400 kWh/kWp/year = 700,000 kWh/year. At an assumed 85% self-consumption ratio, 595,000 kWh/year offsets purchased electricity. These are assumptions, not a site yield forecast. Use a location-specific model and interval demand before an investment decision.
Returns: distinguish avoided purchases from export revenue
Calculate avoided electricity cost using the applicable time-of-use periods and the energy actually consumed on site. Deduct maintenance, replacement provisions and other operating costs. Evaluate export revenue only where the project has a confirmed legal and commercial route. Simple payback is capital cost divided by annual net savings; it does not replace a discounted cash-flow analysis.
Roof, protection and operational interfaces
Check remaining roof life, structural loads, wind uplift, corrosion, safe access and waterproofing before fixing the array. Electrical design checks include temperature-corrected string voltage, inverter operating limits, cable ampacity and voltage drop, isolation, bonding, surge protection and anti-islanding. Ordinary grid-connected PV does not provide outage backup without the required storage, controls and electrical separation.
What belongs in the bill of quantities
| Work or material group | Measurement basis | What the offer should define |
|---|---|---|
| PV modules | Module / kWp DC | Selected rating, quantity, layout and product warranty |
| Inverters and AC connection | Unit / set | AC rating, operating limits, protection and monitoring |
| Mounting and roof interfaces | Set / m² / structural quantities | Approved roof-specific design; strengthening separated |
| DC and AC cabling | m / termination / circuit | Measured routes, installation method, supports and losses |
| Protection, earthing and monitoring | Set / point | Isolation, SPDs, metering, export control and communications |
| Installation and commissioning | Work package | Access equipment, tests, handover and agreed shutdowns |
From your brief to acceptance
- Submit roof drawings, location, electricity bills and operating hours.
- Review feasibility and compare capacity and connection options.
- Verify the roof, electrical installation and access constraints on site.
- Approve design, equipment, BOQ, exclusions and construction programme.
- Install, inspect and complete the agreed electrical and monitoring tests.
- Accept the system, receive operating documents and begin the warranty period.
Documents you should receive
- Design basis, array layout and single-line diagram
- Module/string schedule, inverter schedule and cable calculations
- Itemized BOQ with supply, installation and optional works separated
- Inspection and commissioning records with equipment identification
- As-built drawings, monitoring access and operating instructions
- Warranty schedule separating installation obligations from manufacturer terms
The quotation identifies included documents, review cycles, approvals, acceptance criteria, exclusions and warranty obligations.
Frequently asked questions
Can I obtain an initial estimate before a site survey?
Yes. Roof drawings, location, bills, connection information and an equipment brief can support a budget estimate. Structural suitability, actual routes and connection conditions remain subject to verification before a firm construction offer.
Does the solar calculator issue a final construction quotation?
No. It is a planning aid. Its capacity, energy, cost and schedule outputs depend on entered assumptions and available price data. The final offer follows engineering review and an agreed BOQ.
Can a battery be added later?
Potentially. Check inverter compatibility, AC/DC coupling, space, protection, communications and the operating objective at the initial design stage. Storage readiness does not mean every inverter can accept any battery.
What warranty applies?
Installation works can be quoted with a 12-month defects warranty from contractual acceptance. Module, inverter and battery manufacturer warranties are separate; their exclusions, labour coverage and claim process must be stated in the offer.
Technical reference framework
Relevant engineering references are selected for the contracted equipment and installation. Applicable Vietnamese requirements, local network conditions, manufacturer instructions and the agreed design basis determine project compliance; listing a standard is not a certification claim.
Send the information needed for a useful quotation
Start with the drawings and data you already have. We can identify what can be priced now and which points require verification.
- Site location and building use
- 12 months of electricity bills; interval load data if available
- Roof area, roof type, age and structural drawings
- Transformer capacity, single-line diagram and proposed connection point
- Operating days, daytime demand and any export restriction
- Target completion date and whether backup/storage is required
Contact QuangAnhcons
+84 919 758 191
sales@quanganhcgte.com
The email button opens your mail app with a service-specific brief. Attach drawings or share a viewable document link before sending.
Solar & storage planning tool
Use the planner below to compare an initial configuration. Review all assumptions, excluded works and price qualifications before using the result for a budget. Contact details are not needed to explore the calculation.
Choose Solar & storage for your property
From electricity needs to a preliminary system and budget. No contact details required.
Automatic pre-survey calculations
Enter your sizing input to see module area, access area, roof requirement, module mass, capacity and electrical configuration.