Power Systems & Electronics

Terma provides customized electronic systems for space missions as well as more standardized solutions such as Terma's well-proven modular power supply system.


Terma has developed and manufactured electronic units for space missions for more than three decades and has designed and manufactured spacecraft power system units for a number of missions, 

  • the Danish Ørsted satellite
  • XMM-Newton
  • Integral
  • Rosetta
  • Mars Express
  • Venus Express
  • BepiColumbo.

The Galileo Satellite Navigation System
Terma is also contracted to deliver the Power Conditioning and Distribution Unit for the first four satellites of the European Galileo satellite navigation system. 

Terma has supplied the Power Conditioning and Distribution Unit for the first four Galileo satellites (image courtesy: ESA)


Terma's Power Management and Distribution (PMAD) system is a flight-proven modular concept qualified for deep space and Earth orbit missions. The unique system maximizes power utilization in satellite missions.

The system scales to a power capacity of up to 3 kW and offers Autonomous Maximum Power Point Tracking (MPPT), high power efficiency, and half the weight of traditional PMAD electronics.

The MPPT function is designed with the latest state-of-the-art power technology to enhance reliability and power-to-weight performance, while utilizing high frequency switched-mode power conversion technology to minimize unit mass. 

Test of a Power Conditioning and Distribution Unit at the Terma HQ in Lystrup, Denmark


Work on a Power Conditioning Unit at Terma HQ in Lystrup, Denmark

The Power Management and Distribution system architecture is modular, offering a unique opportunity for tailoring the design to mission-specific requirements, while at the same time still benefiting from a standardized and qualified solution. 

The enhanced flexibility and adaptability facilitates convenient assembly, integration, and testing of the satellite.

The MPPT function continuously optimizes the power available to the various payloads and subsystems on board the satellite. This function also improves the power management performance for missions with widely varying payload power consumption.

The improved margins on the satellite design may be traded with smaller solar panels, lower satellite mass, reduced launch constraints, etc.

The MPPT simplifies the design of the solar panels through reduced coupling between the power management system and the particular design options for the solar panels and the batteries.