Steca Solsum

The Steca Solsum-Line continues the huge success of one of the most used SHS controllers. With a power range of up to 10 A at automatically recognized 12 V or 24 V it fits to a system sizes of maximum 240 W.

Full circuit board protection with LED display for simple recognition of battery status. Various connections make it possible to connect easily to solar panels, battery and load. The Steca Solsum works on PWM as a low loss series controller.

Solar charge controllers Steca Solsum 2525 and 4040 are newly developed products based on the internationally renowned controller family Solarix PRS. With increased module and load current, the controllers are now also suitable for even larger systems. 

Foto Solsum
Product Documentation

Product features

  • True sine wave voltage.
  • High overload capacity.
  • Integrated MPP tracker.
  • Multi-stage charge technology.
  • Monthly equalising charging.
  • Auxiliary contact for starting a generator.
  • Adjustable charging end voltages.
  • Battery type: gel / liquid lead battery.
  • Lightweight construction∙Easy installation.


Electronic protection functions

  • Overload protection.
  • Reverse polarity protection of modules, for battery via fuse.
  • Deep discharge protection.
  • Short-circuit protection for load.
  • Reverse current protection at night.
  • Overtemperature and overload protection.
  • Acoustic alarm∙PE connection.



  • Graphic LC display and three LEDs show operating states.



  • Simple menu-guided operation.
  • Button-based programming.



  • Current data is output via RS-232.



  • Interconnectable in parallel or in three phases (parallel kit required).



  • CE-compliant.
  • RoHS-compliant.
  • Manufactured under the terms of ISO 9001 and ISO 14001.
Tabla Steca Solsum