Limitless Energy by ONVALLA
Clean Energy Solutions for Business: Solar Cells and EV Charging
Limitless Energy is ONVALLA’s clean energy brand. We design, install and look after solar PV systems and EV charging stations for homes, commercial buildings and factories across Thailand.
16,724 kW
Solar capacity installed, 2021–2025
29,635
Solar panels installed
3,189 kW
EV charger capacity installed, 2023–2025 (28 units)
ISO
9001 · 14001 · 45001 certified company
About Limitless Energy
What is Limitless Energy?
Limitless Energy (พลังงานไร้ขีดจำกัด) is the clean energy business of ONVALLA Co., Ltd., a subsidiary of ALLA Public Company Limited. It covers the whole life of a renewable energy system: design, installation and ongoing care.
The brand grew from one belief: clean energy is the key to a better future. Our slogan says the same thing: Clean energy drives the future.
In short
- What we do: solar PV systems (panels, inverters, batteries, mounting and accessories), smart monitoring and EV charging stations.
- Who it is for: homes, condominiums, offices, commercial buildings, factories and fleets.
- How we work: one team from consultation, site survey and design to installation, commissioning and after-sales service.
- Where: projects throughout Thailand, run from ONVALLA in Lam Luk Ka, Pathum Thani.
Clean energy drives the future
Our solutions
Two Clean Energy Solutions, One Partner
Generate your own electricity from the sun, then use it to charge electric vehicles on site. Choose one solution or combine both.
Solar PV
Solar Cell Systems
Rooftop and ground solar systems sized to your consumption, roof and budget, with monitoring from day one.
- On-grid, off-grid and hybrid systems
- Trina Solar modules; SolaX, Huawei and SolarEdge inverters
- Mounting, cabling and protection devices
- Real-time monitoring on web and mobile
EV charging
EV Charging Stations
AC wallboxes for homes, AC posts for workplaces and DC fast chargers for public and fleet sites.
- Schneider Electric EVlink and Grasen chargers
- AC from 3.7 kW up to DC 200 kW
- OCPP back-end, RFID and app-based billing
- Site survey, installation and maintenance
Brands
Equipment From Brands We Represent
We specify proven equipment and install it as one complete system.
Solar PV modules
Trina Solar
Tier 1 solar modules from a company listed on the STAR Market of the Shanghai Stock Exchange.
Authorized dealer
SolaX Power
Hybrid and on-grid inverters and energy storage for residential and C&I systems.
Inverters & storage
Huawei
Solar inverters and energy storage for commercial, industrial and on/off-grid applications.
Inverters & optimizers
SolarEdge
Inverters with module-level power optimizers and monitoring.
Authorized distributor
Schneider Electric
EVlink Home, EVlink Pro AC and EVlink Pro DC chargers for homes, businesses and public sites.
Authorized distributor
Grasen
AC wallboxes and DC fast chargers with CCS2, CHAdeMO and GB/T connectors.
Brand names and logos belong to their owners.
From design to ongoing care
How a Limitless Energy Project Works
One team stays with your project at every stage, from the first conversation to long-term service.
- Consultation & site survey We learn your energy use and goals, then check the roof, site and electrical system.
- Design & investment planning We size the system, plan the installation and estimate investment, savings and payback.
- Permits, installation & commissioning We handle permits and approvals, install the system and test it before handover.
- Monitoring & after-sales Real-time monitoring, preventive and corrective maintenance, and technical support.
Our installation impact
Solar Systems We Installed, 2021–2025
Combined figures for the solar PV systems Limitless Energy installed between 2021 and 2025.
16,724 kW
Solar capacity installed (29,635 panels)
27,469 MWh/year
Electricity generated
19.23 ktCO₂/year
CO₂ emissions reduced
874,025 trees/year
Tree equivalent
Figures from ONVALLA’s installation records. Generation and CO₂ values are yearly estimates for the installed systems.
Project references
Clean Energy Projects We Have Delivered
Solar rooftops for factories and buildings, and EV charging for organizations.
Solar rooftop · Rayong · 2022
1,760.35 kWp rooftop system
EV charging
Kasikornbank
Our customers
Trusted by Organizations Across Sectors
Energy utilities, manufacturers, logistics companies, universities and public agencies.
Backed by ONVALLA
Why Choose Limitless Energy?
Limitless Energy brings ONVALLA’s engineering, project management and after-sales service from the industrial equipment business to clean energy.
- Part of the ALLA group. ONVALLA Co., Ltd. is a subsidiary of ALLA Public Company Limited.
- Certified management systems. ISO 9001, ISO 14001 and ISO 45001.
- Complete service. Design, permits, installation, commissioning, monitoring and maintenance from one team.
- Proven brands. Equipment from Trina Solar, SolaX, Huawei, SolarEdge, Schneider Electric and Grasen.
Our brand values
- Trustworthy
- Innovative
- Sustainable
- Progressive
- Eco-conscious
Limitless Energy catalogue
Browse our 2025 product catalogue online.
Knowledge
Clean Energy Articles
FAQ
Frequently Asked Questions
What is Limitless Energy?
Limitless Energy is the clean energy brand of ONVALLA Co., Ltd., a subsidiary of ALLA Public Company Limited. It designs, installs and maintains solar PV systems and EV charging stations in Thailand.
What does Limitless Energy install?
Solar PV systems (modules, inverters, batteries, mounting and accessories), solar monitoring, and EV chargers from home AC wallboxes up to DC fast chargers, for residential, commercial and industrial sites.
Which brands does Limitless Energy work with?
Trina Solar modules; SolaX Power (authorized dealer), Huawei and SolarEdge inverters; and Schneider Electric and Grasen EV chargers, for which ONVALLA is an authorized distributor.
Can I install solar panels and EV chargers together?
Yes. We can design a solar system and an EV charging station as one project, so the chargers can use electricity generated on your own roof.
Does Limitless Energy provide after-sales service?
Yes. After handover we provide system monitoring, preventive and corrective maintenance and technical support.
How do I request a quotation?
Call (+66) 02-193 5380-5, email info@onvalla.com, chat with us on LINE (@onvalla) or send the form on the Contact Us page.
Ready to Switch to Clean Energy?
Tell us about your site and your energy goals. Our team will recommend the right solar or EV charging solution and prepare a quotation.
Sales
(+66) 02-193 5380-5 · info@onvalla.com
Service
(+66) 091-771 0311-13 · LINE @onvalla