ONVALLA provides solar rooftop as a one-stop service for homes, businesses and industry: consulting, site survey, system design, installation, permit applications, system inspection and after-sales service, for on-grid, off-grid and hybrid systems. ONVALLA uses Tier 1 solar panels and inverters from world-class brands such as Huawei and SolarEdge, installed by an experienced engineering team.
What Does the One-Stop Service Include?
- Solar installation for both public-sector and private-sector customers
- System consulting, site survey, design and installation from start to finish
- Assessment and calculation of electricity use, with an investment plan
- Preparation and submission of permit documents, and follow-up with the authorities
- After-sales service, inspection, panel cleaning and maintenance
Warranty Coverage
| Item | Warranty |
|---|---|
| Solar panels | 25 years |
| Inverter | 10 years |
| Installation work | 2–5 years |
| Overall quality warranty | Up to 25 years |
For full details, see solar warranty and after-sales.
How Is a Solar Rooftop Installed?
- Planning and suitability assessment: check the roof’s position and angle, hours of sunlight and how much sun reaches the roof.
- Base system installation: the roof mounting structure and the electrical transmission system, connected to the building’s electrical system.
- Panel installation: panels are fixed to the mounting structure and connected to the electrical system.
- Inverter installation: choose an inverter matched to the array capacity and the building’s electrical system; install it in a well-ventilated place away from heat sources such as air-conditioner units; connect it correctly and safely.
- Testing: check system parameters such as current, voltage and power to confirm they are within normal ranges.
Why Solar Rooftop?
- Lower energy costs, because sunlight is free and inexhaustible
- Environmentally friendly, with no greenhouse gas emissions in operation
- Adds value to homes and business properties
- Supports sustainable energy use and reduces reliance on fossil fuels
- Pays back within a few years and keeps saving for the life of the system; see how to calculate system size and payback
Why Choose ONVALLA?
- Consulting and installation supervised by professional engineers
- Products and installation materials that meet international standards, including Trina Solar panels
- A professional installation team
- Advice throughout the life of the system
- Inspection, panel cleaning and maintenance services
Frequently Asked Questions
Does ONVALLA handle the permits?
Yes. ONVALLA prepares and submits the permit documents and follows them up. See the permit process.
Which inverter brands does ONVALLA use?
World-class brands such as Huawei and SolarEdge.
Does ONVALLA install systems for factories?
Yes. ONVALLA installs solar for homes, businesses and industry, including large rooftop projects; see the 800.06 kWp rooftop project in Chonburi.
See the solar page or request a quotation.
