Steca Solarix PRS2020 20A 12/24V Solar Charge Controller

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Steca Solarix PRS2020 20A 12/24V Solar Charge Controller

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Steca Solarix PRS2020 20A 12/24V Solar Charge Controller

The simplicity and high performance of the Steca Solarix PRS solar charge controller make it particularly appealing. At the same time, it offers a modern design and a convenient display, all at an extremely attractive price.

Several LEDs in various colours emulate a tank display, which gives information on the battery's state of charge. Here, Steca’s latest algorithms are employed, resulting in optimal battery maintenance. The Solarix PRS charge controllers are equipped with an electronic fuse, thus making optimal protection possible. They operate on the serial principle, and separate the solar module from the battery in order to protect it against overcharging.

For larger projects, the charge controllers can also be equipped with special functions: e.g. with night light function and selectable charging plateau and deep-discharge protection voltages.

Features of the Steca Solarix PRS2020 20A 12/24V Solar Charge Controller

  • Series controller
  • Automatic detection of voltage
  • Voltage and current regulation
  • PWM control
  • Multistage charging technology
  • Current compensated load disconnection
  • Automatic load reconnection
  • Temperature compensation
  • Common positive grounding or negative grounding on one terminal
  • Integrated self test
  • Monthly maintenance charge

Electronic Protection Functions

  • Overcharge protection
  • Deep discharge protection
  • Reverse polarity protection of load, module and battery
  • 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


  • Multifunction LED display
  • Multi-coloured LED
  • 5 LEDs show operating states
    • For operation, state of charge, fault messages


  • Night light function pre-set in the factory or adjustable via Steca PA RC 100
  • Parameterisation of function values via Steca PA RC 100 


  • Compliant with European Standards (CE)
  • RoHS compliant
  • Made in Germany
  • Developed in Germany
  • Manufactured according to ISO 9001 and ISO 14001
Technical Dataat 25 °C / 77 °F PRS1010 PRS1515 PRS2020 PRS3030
System voltage 12 V (24 V)
Own consumption < 4 mA

DC Input Side
Open Circuit Voltage Solar Module < 47 V
Module Current 10 A 15 A 20 A 30 A
DC Output Side
Battery Voltage 9 V ... 17 V (17.1 V ... 34 V)
Load Current10 A15 A20 A30 A
End of Charge Voltage 13.9 V (27.8 V)
Boost Charge Voltage 14.4 V (28.8 V)
Equaloisation Charge 14.7 V (29.4 V)
Reconnection voltage (LVR) 12.4 V … 12.7 V (24.8 V … 25.4 V)
Deep discharge protection (LVD) 11.2 V … 11.6 V (22.4 V … 23.2 V)

Operating Conditions
Ambient temperature -25 °C … +50 °C

Fitting and construction
Terminal (fine / single wire) 16 mm² / 25 mm² - AWG 6 / 4
Degree of Protections IP 32
Dimension 187 x 96 x 45 mm
Weight 345 g


Note: Specifications and pricing of the Steca Solarix PRS2020 20A 12/24V Solar Charge Controller subject to change without notice. Illustrations and descriptions of the Steca PRS2020 do not claim to be complete or exhaustive.

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