About ONS Enerji
ONS Enerji Sistemleri is an energy technology company that brings together more than thirty years of engineering expertise in voltage regulator, transformer and UPS manufacturing with long-standing investment and management experience across several industries.
Our founding story
Our technical foundation rests on the deep experience of our founding partner, who has been manufacturing voltage regulators, transformers and uninterruptible power supplies (UPS) for more than thirty years. Years spent in the factory, in the field and on projects allow us to analyse the needs of different industries accurately and to design our products for long service life and operational safety.
On the corporate management and investment side, we draw on the experience of our Chairman of the Board, Orhan Eraslan, who has founded and led companies in trade, industry, construction and manufacturing since 1996. This background gives our company a strong footing in planning large-scale projects, managing investment decisions and building a sound corporate structure.
ONS Enerji Sistemleri was founded by uniting these two strong foundations under an independent brand. By combining our engineering depth with investment vision, transparent communication and a project-specific approach, we aim to be a trusted solution partner in domestic and international markets.
Engineering foundation
Over thirty years of manufacturing expertise in voltage regulators, transformers and UPS systems.
Investment and management experience
Our Chairman’s entrepreneurial journey in trade, industry and construction began.
ONS Enerji Sistemleri
Engineering and investment expertise united under an independent energy brand.
- 30+ years of manufacturing experience
- 30 years of investment and management experience
- 5 product groups
- 1P · 3P single- and three-phase solutions
Message from our Chairman
Throughout a business career that began in 1996, I have taken part in founding and growing many companies in trade, industry, construction and manufacturing. The investments we have made across different sectors have given us valuable experience in planning, financing and corporate management.
At a time when technology is rapidly transforming industry, we decided to bring our investment and management experience into the energy sector. We founded ONS Enerji Sistemleri with this vision, together with our founding partner, who has more than thirty years of experience in regulator, transformer and UPS manufacturing.
Our goal is to build a manufacturing brand with a voice on the world stage that represents our country with distinction in international markets, without ever compromising on quality. I thank our customers, business partners and colleagues for the trust they place in us along the way.
Our milestones
Key steps in our journey in the industry.
- Foundation
Engineering foundation
Over thirty years of manufacturing expertise in voltage regulators, transformers and UPS systems.
- 1996
Investment and management experience
Our Chairman’s entrepreneurial journey in trade, industry and construction began.
- Today
ONS Enerji Sistemleri
Engineering and investment expertise united under an independent energy brand.
Our mission
To reduce failures, downtime and quality loss caused by voltage fluctuation, and to provide customers with reliable, sustainable power solutions sized to the real needs of their load.
Our values
- Engineering honesty
- Transparency
- Sustainable quality
- Fast and clear communication
Our approach
- 01
We design as a manufacturer
We do not stop at off-the-shelf values; kVA, voltage, phase and enclosure follow your load.
- 02
We listen first, then size
Wrong sizing means both cost and failure. So we first understand your load and your grid.
- 03
We share knowledge
Through technical guides, selection tools and open communication, we reach the right decision together.
- 04
We think local and international
We aim to serve domestic and overseas projects with multilingual communication.
What we manufacture
Project-specific solutions across our core product groups.
Servo Voltage Regulator
Servo-motor-controlled voltage regulator that stabilizes voltage smoothly and with high precision.
Static Voltage Regulator
Electronically switched regulator with no moving parts, correcting voltage within milliseconds.
Autotransformer
Single-winding transformer that raises or lowers voltage economically and efficiently.
Isolation Transformer
Transformer with electrically separate windings, providing safety and noise filtering.
Uninterruptible Power Supply (UPS)
Uninterruptible power supply that keeps the load running on battery power during a power outage.
Four steps from needs analysis to delivery
We are with you at every step, from needs analysis to delivery.
Needs analysis
We review your load, voltage, phase and environment data together.
Sizing and quotation
We define kVA and technical specifications and prepare a clear quote.
Manufacturing and inspection
We build and inspect the unit to specification.
Delivery and support
We provide technical support through shipment and commissioning.
Sectors served
We manufacture solutions sized for loads across many industries.
- CNC & machining
- Textile
- Plastics & injection
- Food & packaging
- Medical devices & laboratories
- Elevators & pools
- Automation & panels
- Machine builders (OEM)
- Marine
- Metal, foundry & steel
- Automotive & supply industry
- Mining & quarrying
- Cement, construction & concrete
- Chemicals & pharmaceuticals
- Paper & printing
- Wood & furniture
- Glass & ceramics
- Agriculture & irrigation
- Renewable energy
- Data centers & telecom
- HVAC & refrigeration
- Hotels, malls & commercial buildings
- Oil, gas & petrochemical
- Public & municipal facilities
- Electronics manufacturing & testing
- Aviation & airports
- Railway & rail systems
- Water & wastewater treatment
- Pump & compressor stations
- Lighting & street lighting
- Hospitals & healthcare facilities
- Retail & supermarket chains
- Cold storage & logistics
- Leather & footwear
- Marble & natural stone
- Tire & rubber
- Education & research institutions
- Studio, broadcast & events
- Imported machinery & equipment setup
- Power plants & substations
- Construction sites & temporary power
Our products are insured for 2 years
In case of burn-out or failure, a payout can be claimed under the insurance cover. Scope and conditions follow the policy terms.
Frequently Asked Questions
The most common questions about selecting regulators and transformers, custom manufacturing and the quotation process.
01What is a voltage regulator and what does it do?
A voltage regulator is an automatic protection device that keeps the voltage supplied to equipment close to its nominal value when mains voltage rises or drops. It protects machines, electronic boards and drives from failures and lifetime loss caused by voltage fluctuation.
02What is the difference between a servo and a static regulator?
A servo regulator corrects voltage steplessly and precisely with a servo-driven variac, but more slowly. A static regulator corrects in steps using electronic switches, very fast and with no moving parts. The choice depends on the load’s accuracy and speed needs.
03Are your products covered by insurance?
Yes. ONS Enerji products are covered by insurance for 2 years; in case of burn-out or failure, a payout can be claimed under the insurance cover. Scope, exclusions and the claim process follow the policy terms; please contact us for details.
04What is the difference between an autotransformer and an isolation transformer?
An autotransformer shares one winding between input and output; it is economical and efficient but gives no galvanic isolation. An isolation transformer has two electrically separate windings, providing safety and noise filtering.
05Do you manufacture custom kVA or voltage ratings?
Yes. We size and manufacture regulators and transformers to your load, input/output voltage and phase configuration. Simply share your details through the quote form.
06What information is needed for a quote?
Application, total load power (kW/kVA), input and output voltage, number of phases, quantity and desired lead time. You can submit the form even with incomplete data; our engineers will get back to you.
Let’s define the right solution for your project
Share your load data and operating conditions; we will confirm kVA, voltage and protection needs together with our engineers.