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

Company Introduction


The company is based in Třinec, near Ostrava, the third largest city in the Czech Republic. The R&D teams are located in Brno and Prague.


Development activities are realized by experienced team of workers in the unique Center for Intelligent Energy. This facility was built with total investment costs of USD 1 mil. is used for the development of devices that meet the current and future needs of 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.


The company closely coope­rates with the prestigious universities, including the UWB Pilsen, CTU Prague, BUT Brno and VSB-TUO Ostrava.


Our products and solutions are currently used in more than 40 countries around the world.


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

+420 558 558 311