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 PR 2020 IP

IP 65 Version

  • High End State of Charge control (SOC)
  • Professional battery care
  • Full grafical display
  • Automatic battery voltage detection
  • Full load protection
Steca PR 2020 IP picture 3D.jpg
Steca PR 2020 IP picture.jpg
Steca PR 2020 IP picture 3D.jpg
Steca PR 2020 IP picture.jpg


The functionality of the Steca PR 2020 IP is based on the Steca PR line of solar charge controllers. This is equipped with a a large display which shows the current state of charge (SOC) as a percentage and visually as a level meter. State of charge recognition forms the core of the charge controller. The auto-adaptive state of charge algorithm results in optimal battery maintenance and control. The Steca PR 2020 IP has been specially designed for operation in difficult environments with high salt, moisture and dust content.


Technical drawing: Steca PR 2020 IP IP 65 Version

Product features

  • Shunt topology with MOSFETs
  • State of charge determination with Steca AtonIC (SOC)
  • Automatic detection of voltage
  • PWM control
  • Multistage charging technology
  • Load disconnection depending on SOC
  • Automatic load reconnection
  • Temperature compensation
  • Negative earthing of one or positive earthing of several terminals possible
  • Integrated data logger (energy meter)
  • Evening, night light and daylight functions
  • Integrated self test
  • Monthly equalisation charge

Electronic protection functions

  • Overcharge protection
  • Deep discharge protection
  • Reverse polarity protection of module, 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


  • Graphical LC display
  • for operating parameters, fault messages, self test


  • Simple menu-driven operation
  • Programming by buttons
  • Manual load switch


  • Alarm contact (special version, needs to be mentioned on the purchase order)


  • Fit for use in tropical areas (DIN IEC 68 part 2-30)
  • Compliant with European Standards (CE)
  • RoHS compliant
  • Made in Germany
  • Manufactured according to ISO 9001 and ISO 14001


  • External temperature sensor Steca PA TS20IP10



  •  Steca PR 2020 IP certificate CE · pdf · 0.434 MB

Product data sheet

  •  Steca PR 2020 IP productdatasheet DE · pdf · 0,298 MB
  •  Steca PR 2020 IP productdatasheet EN · pdf · 0.299 MB
  •  Steca PR 2020 IP productdatasheet ES · pdf · 0,300 MB
  •  Steca PR 2020 IP productdatasheet FR · pdf · 0,300 MB


  •  Steca PR 2020 IP manual DE · pdf · 0.700 MB
  •  Steca PR 2020 IP manual EN · pdf · 0.685 MB

Product pics, technical drawings, etc.

  •  Steca PR 2020 IP product pic 3D · jpg, 300 DPI, high quality · 2.266 MB
  •  Steca PR 2020 IP product pic 3D · jpg, 72 DPI, web quality · 0.701 MB
  •  Steca PR 2020 IP product pic · jpg, 300 DPI, high quality · 2.935 MB
  •  Steca PR 2020 IP product pic · jpg, 72 DPI, web quality · 0.937 MB
  •  Steca PR 2020 IP product pic drawing · jpg, 300 DPI, high quality · 0.361 MB
  •  Steca PR 2020 IP product pic drawing · jpg, 72 DPI, web quality · 0.186 MB

Technical data

 2020 IP
Characterisation of the operating performance
System voltage
12 V (24 V)
Own consumption
12 mA
DC input side
Open circuit voltage solar module (at minimum operating temperature)
< 47 V
Module current
20 A
DC output side
Load current
20 A
Reconnection voltage (SOC / LVR)
> 50 % / 12.6 V (25.2 V)
Deep discharge protection < 30 % (SOC / LVD)
< 30 % / 11.1 V (22.2 V)
Battery side
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
liquid (adjustable via menu)
Operating conditions
Ambient temperature
-10 °C … +50 °C
Fitting and construction
Terminal (fine / single wire)
16 mm² / 25 mm² - AWG 6 / 4
Degree of protection
IP 65
Dimensions (X x Y x Z)
122 x 147 x 55 mm
410 g
  • Technical data at 25 °C / 77 °F
  • 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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