Steca Solarix

Alpha, Gamma, Sigma, Omega


The Steca Solarix is the world's most widely used charge controller in systems between 8 and 30 A (up to 900 Wp).

With the well-known Steca-AtonIC state of charge determination, the controller enables ideal battery protection via programmed software. The software includes a self-learning algorithm that displays the battery's state of charge and adapts to the capacity and age of the battery. The charge controller combines the advantages of a shunt and series controller through Steca's own switching concept: the hybrid actuator. The unit safety was increased by a combination of electronic and electromechanical protective devices.


Product features

  • Shunt topology with MOSFETs
  • MicroSD slot for data logging of all minute values
  • State of charge determination with Steca AtonIC (SOC)
  • Automatic detection of voltage
  • PWM control
  • Multistage charging technology
  • Load disconnection depending on SOC
  • Automatic load reconnection
  • Temperature compensation
  • Negative earthing of one or positive earthing of several terminals possible
  • MicroSD slot for data logging of all minute values
  • Integrated self test
  • Monthly equalisation charge

Electronic protection functions

  • Overcharge protection
  • Deep discharge protection
  • Reverse polarity protection of module and battery
  • Reverse polarity protection by internal fuse
  • Automatic electronic fuse
  • Short circuit protection of load and module
  • Overvoltage protection at module input
  • Open circuit protection without battery
  • Reverse current protection at night
  • Overtemperature and overload protection
  • Battery overvoltage shutdown


  • Multi-coloured LED
  • 2 LEDs show operating states
  • for operation, state of charge, fault messages


  • Configuration by jumpers


  • External temperature sensor
  • Alarm contact


  • Approved by the World Bank for Bangladesh, China, Laos, Nepal, Sri Lanka, Uganda and Indonesia
  • Approved for 'ONE' projects in Morocco
  • ThermieB: SUP-995-96
  • Fit for use in tropical areas (DIN IEC 68 part 2-30)
  • Compliant with European Standards (CE)
  • RoHS compliant
  • UL listing in 1999
  • Made in Germany
  • Developed in Germany
  • Manufactured according to ISO 9001 and ISO 14001


  •  Steca Solarix productdatasheet DE · pdf · 0,204 MB
  •  Steca Solarix productdatasheet EN · pdf · 0.220 MB
  •  Steca Solarix manual DE · pdf · 0.262 MB
  •  Steca Solarix manual EN · pdf · 0.257 MB
  •  Steca Solarix manual ES · pdf · 0.261 MB
  •  Steca Solarix manual FR · pdf · 0.265 MB
  •  Steca Solarix manual IT · pdf · 0.268 MB
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