Steca has long stood for ideas and innovations as an electronic manufacturing services (EMS) provider and manufacturer of Steca brand product lines in solar electronics and battery charging systems. Our capability and personal responsibility allow us all to create high-quality individual electronic products and to distribute them on a global scale. Simple business processes, fair partnerships and transparent communication are perceptible and contribute to our joint success.

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As a leading supplier of products for the solar electronics industry, we set the international standard for the regulation and control of solar energy systems. In the three market segments PV grid connected, PV off grid and Solar thermal, the Steca brand is synonymous with innovation and vision. In conception, development, production and marketing, the company is committed to the highest quality standards.

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Steca battery charging technology stands out from the start thanks to its high quality and durability. For decades we have been developing efficient and user-friendly charging technology in cooperation with leading battery manufacturers and institutes in order to ensure that you can use your batteries safely.

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Steca Solarix PRS

PRS 1010, PRS 1515, PRS 2020, PRS 3030

  • Easy to use charge controller
  • LED display
  • Automatic battery voltage detection
  • Full load protection
  • Low self consumption
Steca Solarix PRS picture
Steca Solarix PRS picture 3D
Steca Solarix PRS Produktbild Homepage
Steca Solarix PRS picture
Steca Solarix PRS picture 3D
Steca Solarix PRS Produktbild Homepage


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 give 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.


Technical drawing: Steca Solarix PRS PRS 1010, PRS 1515, PRS 2020, PRS 3030

Product features

  • Serial topology with MOSFETs
  • Automatic detection of voltage
  • Voltage regulation
  • PWM control
  • Multistage charging technology
  • Current compensated load disconnection
  • 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 (≤36 V),load 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
  • Load disconnection on battery overvoltage


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


  • Evening or 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 EU
  • Manufactured according to ISO 9001 and ISO 14001


  • Steca PA RC100



  •  Steca Solarix PRS certificate CE · pdf · 0.803 MB

Product data sheet

  •  Steca Solarix PRS productdatasheet DE · pdf · 0,248 MB
  •  Steca Solarix PRS productdatasheet EN · pdf · 0.248 MB
  •  Steca Solarix PRS productdatasheet ES · pdf · 0,249 MB
  •  Steca Solarix PRS productdatasheet FR · pdf · 0,249 MB


  •  Steca Solarix PRS manual DE · pdf · 0.409 MB
  •  Steca Solarix PRS manual EN · pdf · 0.395 MB
  •  Steca Solarix PRS manual ES · pdf · 0.396 MB
  •  Steca Solarix PRS manual FR · pdf · 0.395 MB
  •  Steca Solarix PRS manual IT · pdf · 0.392 MB

Product pics, technical drawings, etc.

  •  Steca Solarix PRS product pic 3D · jpg, 300 DPI, high quality · 0.067 MB
  •  Steca Solarix PRS product pic 3D · jpg, 72 DPI, web quality · 0.067 MB
  •  Steca Solarix PRS product pic · jpg, 300 DPI, high quality · 0.068 MB
  •  Steca Solarix PRS product pic · jpg, 72 DPI, web quality · 0.068 MB
  •  Steca Solarix PRS product pic drawing · jpg, 300 DPI, high quality · 0.279 MB
  •  Steca Solarix PRS product pic drawing · jpg, 72 DPI, web quality · 0.148 MB

Technical data

 PRS 1010PRS 1515PRS 2020PRS 3030
Characterisation of the operating performance
System voltage
12 V (24 V)
Own consumption
< 4 mA
DC input side
Open circuit voltage solar module (at minimum operating temperature)
< 47 V
Module current
10 A
15 A
20 A
30 A
DC output side
Load current
10 A
15 A
20 A
30 A
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)
Battery side
Battery voltage
9 V … 17 V (17.1 V … 34 V)
End-of-charge voltage
13.9 V (27.8 V)
Boost charge voltage
14.4 V (28.8 V)
Equalisation charge
14.7 V (29.4 V)
Set battery type
Operating conditions
Ambient temperature
-25 °C … +50 °C
Fitting and construction
Terminal (fine / single wire)
16 mm² / 25 mm² - AWG 6 / 4
Degree of protection
IP 31
Dimensions (X x Y x Z)
187 x 96 x 45 mm
345 g
  • Technical data at 25 °C / 77 °F
  • adjustable via Steca PA RC100: reconnection voltage, deep discharge protection, end of charge voltage, boost charge voltage, equalisation charge, battery type
  • Inverters must not be connected to the load output.
SOC, state of charge, determination, charging technology

Steca‘s charging technology

SOC means the current 'state of charge' of the battery. This is given as a percentage.more
Night light systems, special application, Solar Home Systems, greece

Night light systems

Special use of solar home systems for street lights, bus stops and other automatic night lights.more
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