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 2019 - invitation

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We are pleased to inform that we are taking part in the International Power Industry Fair ENERGETAB 2019 in Bielsko-Biala / Poland.

Date: 17 - 19 September 2019
Location: Booth A-25 more icon

GSM-R for Polish Railway

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TELZAS Sp. z o. o. signed with Nokia Solutions and Networks Sp. z o.o. the largest contract in its more than 40 years of history. We will provide power supply and monitoring systems to the GSM-R network being built for PKP Polish State Railways. The aim of the project is to modernize the communication network. more icon

New products



We have introduced a new DC & AC UPS systems in our offera. Click to view more information.

New racks and cabinets


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