Development and engineering
Load study, roof assessment, layout design, yield estimate, technical proposal, and investment model support.
Vietnam solar EPC
Industrial rooftop solar built from development to operation.
Onix Energy develops, designs, constructs, and maintains rooftop PV plants for factories and commercial facilities across Vietnam.
20 MWpDeveloped industrial rooftop PV projects
10+ MWpConstructed in Vietnam
2 MWpInvested and owned rooftop plants
2020Established in Ho Chi Minh City
Solar solutions for factories, homes, and long-term assets
A good solar project is not only a set of panels on a roof. It needs the right roof assessment, equipment selection, electrical protection, installation method, monitoring plan, and after-sales response. Onix now serves industrial EPC projects while also providing practical residential and small commercial packages.
1
Industrial Applications
Technical and policy notes for self-consumption solar on Vietnamese factories, warehouses, and industrial roofs.
2Residential Rooftop Package
Practical 3-5 kW starting packages, sizing guide, roof checks, and typical family-use cases.
3Hybrid with Battery Storage
How storage supports backup power, self-consumption, weak-grid homes, and future energy management.
4Products and spare parts
Solar modules, inverters, rooftop mounting, battery-related accessories, monitoring, and spare parts.
Onix Video
See Onix project work in motion
The company video gives a quick view of rooftop solar construction, electrical rooms, equipment installation, and completed systems.
- Real project images from Vietnam rooftop solar sites.
- A practical view of mounting, inverter, cabinet, and rooftop workmanship.
- Useful as a first introduction before technical drawings and quotation.
EPC services for factory roofs
From site survey to grid connection, we focus on safe engineering, predictable delivery, and practical operation for industrial clients.
Procurement and construction
PV modules, inverters, mounting, electrical BOS, installation management, testing, commissioning, and documentation.
Operation and maintenance
Monitoring, troubleshooting, cleaning plans, inverter service, performance review, and lifecycle support.
Quick sizing guide
The table below is for early discussion only. Final system size depends on roof area, structure, shade, load profile, daytime usage, grid rules, and backup requirements.
| Use case | Typical system | Roof area | Typical monthly generation | Usually includes |
|---|---|---|---|---|
| Small home | 3-5 kWp grid-tied or hybrid | 20-35 m2 | 300-650 kWh | PV modules, inverter, mounting, AC/DC protection, monitoring |
| Villa or high-consumption home | 6-12 kWp with optional battery | 40-80 m2 | 650-1,500 kWh | Hybrid inverter option, battery cabinet, backup load design |
| Shop, office, small workshop | 15-50 kWp commercial rooftop | 90-300 m2 | 1,800-6,000 kWh | Three-phase inverter, monitoring, metering, electrical cabinet |
| Factory or warehouse | 60 kWp to MW-scale EPC | 360 m2 and above | Project-specific | Full EPC, safety plan, commissioning, O&M documentation |
Featured project experience
Onix has developed about 20 MWp of industrial rooftop solar projects and constructed more than 10 MWp in Vietnam.
Frequently asked questions
For a home system, send monthly electricity bill, roof photos, location, and whether backup power is required. For factory EPC, send roof layout, electricity bills, transformer information, operating hours, and any safety or construction restrictions.
Can Onix do both factory EPC and home systems?
Yes. Industrial EPC is the core business, and residential or small commercial systems can be provided as standardized packages.
Is a battery always necessary?
No. Grid-tied systems are usually simpler and lower cost. Batteries are useful when the client needs backup power.
What information is needed for a quotation?
Roof photos or drawings, electricity bills, location, roof type, expected backup loads, and the preferred investment model.