We are a leading manufacturer and supplier of uninterruptible power supply systems, as well as remote monitoring and supervisory systems. We provide the full range of services, starting from the definition of customer needs, through analysis and design, to equipment delivery and system implementation. Additionally, we support our customers with aftersales service, consulting and training.

Telzas is a part of a dynamically growing ETC Group. Our solutions were successfully implemented in telecommunications, IT, Internet services, data transmission, energetics  


We offer the design & manufacture of power supply and supervisory systems adjusted to individual needs of the clients. Over 30-year experience and individual approach to each client enable us to produce solutions that meet the requirements of our customers.

We offes services in area of up to 1kV (AC or DC) on sites in different phases of realization (renovated, exploited, newly built) in area: designing and consulting of technical documentation, power supply systems (including hybrid solutions: PV panels, wind turbines), HVAC, AC and DC distributives, remote monitoring 


ENERGETAB 2015 - invitation

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We sincerely invite you to visit our booth at the 28th International Fair for Energy - ENERGETAB 2015.

Date: September 15 – 17, 2015
Localization: Booth No N 21, Bielsko-Biala, Poland more icon

SDO power supply systems newly introduced to our range

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We have introduced a new product line: the SDO power supply systems based on high-efficient PDO 48/42-2000W rectifiers. This new rectifier offers 2kW power at the height of 1U.
With this technologically advanced module, we are able to design DC power systems with smaller size and weight. more icon

New products

Racks and cabinets

We have introduced a new product lines in our offer: SW indoor cabinets, SZ outdoor cabinets and TMPL racks for energy and telecommunications systems. Click to view more information.

5800W high-efficiency rectifiers

High-efficient PDG 48/120-5800W-02 rectifier module available now! Maximum efficiency of 96.2% reduce the cost of energy as well as heat dissipation on sites. See detailed information in the datasheet of SDG 2400