Steca Solarix 2020-x2

Dual battery charge controller


The Steca Solarix 2020-x2 is a state-of-the-art dual battery charge controller that is ideal for use in the leisure sector. It has a solar module input that is suitable for all 36-cell solar modules in 12 V systems and for all 72-cell crystalline solar modules in 24 V systems. Both the main battery and the starter battery are permanently and simultaneously charged by the solar module. In the process, 90 percent of the available power flows into the main battery, while the auxiliary battery is kept at the full charge level with 10 percent of the power.

The Steca PA LCD1 remote display can be used to change the distribution of the charging power. The charge controller has a powerful load output that is only fed from the main battery. The charge controller has a USB charging socket that can be used to charge smartphones and tablets. The Steca PA LCD1 remote display can be optionally connected.

Steca Solarix2020 x2 technische Zeichnung


Product features

  • Serial topology with MOSFETs
  • Automatic detection of voltage
  • Voltage and current regulation
  • PWM control
  • Multistage charging technology
  • Current compensated load disconnection
  • Automatic load reconnection
  • Temperature compensation
  • Positive earthing of one or negative earthing of several terminals possible
  • Integrated self test
  • Monthly equalisation charge
  • USB charge socket for smartphones and tablets

Electronic protection functions

  • Overcharge protection
  • Deep discharge protection
  • Reverse polarity protection of module (≤36 V),load and battery
  • Automatic electronic fuse
  • Short circuit protection of load and module
  • Open circuit protection without battery
  • Reverse current protection at night
  • Overtemperature and overload protection
  • Load disconnection on battery overvoltage


  • 4 LEDs show operating states


  • StecaLink Bus


  • Compliant with European Standards (CE)
  • RoHS compliant
  • Made in EU
  • Manufactured according to ISO 9001 and ISO 14001


  • Remote display Steca PA LCD1


  •  Steca Solarix 2020-x2 certificate CE · pdf · 0.786 MB
  •  Steca Solarix 2020-x2 productdatasheet DE · pdf · 0,996 MB
  •  Steca Solarix 2020-x2 productdatasheet EN · pdf · 0.996 MB
  •  Steca Solarix 2020-x2 manual DE · pdf · 0.614 MB
  •  Steca Solarix 2020-x2 manual EN · pdf · 0.440 MB
  •  Steca Solarix 2020-x2 manual ES · pdf · 0.446 MB
  •  Steca Solarix 2020-x2 manual FR · pdf · 0.447 MB
  •  Steca Solarix 2020-x2 manual IT · pdf · 0.442 MB
  •  Steca Solarix 2020-x2 manual NL · pdf · 0.437 MB
  •  Steca Solarix 2020-x2 manual PT · pdf · 0.446 MB
  •  Steca Solarix 2020-x2 product pic · jpg, 300 DPI, high quality · 1.576 MB
  •  Steca Solarix 2020-x2 product pic · jpg, 72 DPI, web quality · 0.547 MB
  •  Steca Solarix 2020-x2 product pic 3D · jpg, 300 DPI, high quality · 0.846 MB
  •  Steca Solarix 2020-x2 product pic 3D · jpg, 72 DPI, web quality · 0.284 MB
  •  Steca Solarix 2020-x2 product pic drawing · jpg, 300 DPI, high quality · 0.452 MB
  •  Steca Solarix 2020-x2 product pic drawing · jpg, 72 DPI, web quality · 0.252 MB

Technical data

 Solarix 2020-x2
Characterisation of the operating performance
System voltage
12 V (24 V)
Own consumption
22 mA
DC input side
Open circuit voltage solar module (at minimum operating temperature)
< 60 V
Module current
20 A
DC output side
Load current
20 A
USB charge socket
5 V / 1.5 A
Reconnection voltage (LVR)
12.5 V
Deep discharge protection (LVD)
11.7 V
Battery side
End-of-charge voltage
14.1 V (28.2 V)
Boost charge voltage
14.4 V (28.8 V)
Equalisation charge
15 V (30 V)
Set battery type
Main / auxiliary battery charging ratio
90 % / 10 %
Operating conditions
Ambient temperature
-10 °C … +60 °C
Fitting and construction
Terminal (fine / single wire)
6 mm² / 10 mm² - AWG 10 / 8
Degree of protection
IP 31
Dimensions (X x Y x Z)
190 x 120 x 57 mm
500 g
  • Technical data at 25 °C / 77 °F
  • adjustable via Steca PA LCD1: reconnection voltage, deep discharge protection, end of charge voltage, boost charge voltage, equalisation charge, battery type
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