6.6c, 8.8c, 10.10c

The Steca Solsum is one of the most sold charge controllers on the market. It is optimally suited for use in solar home systems with load currents of up to 10 A at 12 V/24 V and up to 240 Wp module output.

The Solsum C generation has a completely protected circuit board and is distinguished by its clear display, which uses two LEDs. This generation of charge controllers has also been conceived to allow the controllers to be made and repaired on-site in large projects.

Product features

  • Shunt controller
  • Voltage regulation
  • Automatic detection of voltage
  • PWM control
  • Multistage charging technology
  • Load disconnection depending on voltage
  • Automatic load reconnection
  • Temperature compensation
  • Common positive or negative grounding on one terminal
  • Monthly maintenance 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


  • Approved by the World Bank for Bangladesh, China, Laos, Nepal, Sri Lanka, Uganda and Indonesia
  • Fit for use in tropical areas (DIN IEC 68 part 2-30)
  • Compliant with European Standards (CE)
  • RoHS compliant
  • Developed in Germany
  • Manufactured according to ISO 9001 and ISO 14001

  6.6c 8.8c 10.10c


System voltage 12/24 V
Own consumption < 4 mA
DC input side
Maximum open circuit voltage < 47 Vcc
Module current 6 Amp 8 Amp 10 Amp
DC output side
Load current 6 Amp 8 Amp 10 Amp
End of charge voltage 13,9 / 27,8 Vcc
Boost charge voltage 14,4 / 28,8 Vcc
Reconnection voltage ( LVR) 12,4 - 12,7 Vcc / - 22,4 - 25,2 Vcc
Deep discharge protection (LVD)  11,2 - 11,6 Vcc / 22,4 - 23,2 Vcc
Operating conditions      
Ambient temperature -25 ºC a + 60 ºC
Fiting and construction      
Terminal (fine / single wire) 4 mm2 / 6 mm2
Degree of protection IP 32
Dimensions 145 x 100 x 30 mm
Weight 150 gr.


Technical data at  25 ºC

Catálogo General 2020

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