ModemTec is reliable producer and supplier of comprehensive solutions in the field of  medium and low voltage lines diagnostics, power line communication, and other smart grid technologies. Metering International magazine placed ModemTec in TOP 50 world’s most important companies in the area of Smart Metering and Smart Grid.

Offered Solutions

Partial Discharge Diagnostic

Online diagnostic with PD Doctor system for low and medium voltage.

Medium Voltage PLC Communication

Communication over medium voltage lines up to 35 kV.

Low Voltage PLC Communication

Data transfers over existing power lines up to 1000 V.

PLC Cleaner for Smart Grids

Diagnostic tool to increase communication reliability.

Photovoltaic power plant diagnostics

Online diagnostics of photovoltaic panels and power plants.

About ModemTec


ModemTec is headquartered in Třinec, Czech Republic near Ostrava with additional R&D centers in Brno and Prague. Leadership is comprised of experienced professionals from the energy, technology, and business sectors.


Development activities are conducted by an experienced team at the state-of-the-art Center for Intelligent Energy – a $1 million R&D facility focused on innovative technologies for the energy sector including high-voltage electrical engineering.


ModemTec currently employs almost 50 employees. It has own production capabilities, competence for assembly and re­covery, and provides pre­mium service for its cu­sto­mers, including post-warranty service.


ModemTec partners with leading academic institutions on R&D including University of West Bohemia, Czech Technical University, Brno University of Technology, and VSB-Technical University of Ostrava.


Our products and solutions are currently used by leading utility companies. grid operators, and research institutions in more than 40 countries around the world.


ModemTec s.r.o.
Oldřichovice 738
739 61 Třinec
Czech Republic

+420 558 558 311