Steca Solsum

5.0c, 8.0c, 6.6c, 8.8c, 10.10c


The Steca Solsum is one of the best-selling charge controllers of all time. It is ideally 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 printed circuit board and features an easy-to-understand display via two LEDs. This generation of charge controllers was also designed in such a way that the controllers can also be manufactured and repaired on site in large projects.


Product features

  • Shunt controller
  • Automatic detection of voltage
  • Voltage regulation
  • PWM control
  • Multistage charging technology
  • Load disconnection depending on voltage
  • Automatic load reconnection
  • Temperature compensation
  • Negative earthing of one or positive earthing of several terminals possible
  • 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


  • 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


  •  Steca Solsum productdatasheet DE · pdf · 0,257 MB
  •  Steca Solsum productdatasheet EN · pdf · 0.290 MB
  •  Steca Solsum manual DE · pdf · 0.143 MB
  •  Steca Solsum manual EN · pdf · 0.143 MB
  •  Steca Solsum manual ES · pdf · 0.145 MB
  •  Steca Solsum manual FR · pdf · 0.145 MB
  •  Steca Solsum manual IT · pdf · 0.140 MB
  •  Steca Solsum manual PT · pdf · 0.141 MB
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