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 TR 0301

3 inputs, 1 output

  • Compact, multipart designer casing
  • Graphical LCD display with backlighting
  • Animated representation of the systems and operating states
  • Non-verbal menu navigation
Steca TR0301 picture
Steca TR0301 picture 3D
TR A301 Produktbild Homepage
Steca TR0301 picture
Steca TR0301 picture 3D
TR A301 Produktbild Homepage


The Steca TR 0301 was the first controller on the market to be equipped with a graphic display, on which an animated solar circuit of a solar energy system fully indicates the operating status of the system.

The clearly arranged display ensures easy operation using pictograms. The controller was jointly designed with an internationally renowned design centre. The controller is used for monitoring and controlling solar thermal systems with one collector array and one storage tank. In addition, the controller performs important system monitoring and safety functions to ensure safe and long-lasting operation of the entire system. The numerous additional functions of the Steca TR 0301 also include a maximum storage tank temperature function, a tube collector function, an anti-freeze function, a holiday and storage recool function as well as a choice of temperature indications in either degrees Celsius (°C) or Fahrenheit (°F). The operational safety of the system is supported by a sophisticated fault diagnosis. The multi-coloured LCD backlighting ensures quick and safe location of occurring errors and facilitates quick troubleshooting.


Technical drawing: Steca TR 0301 3 inputs, 1 output

Product features

  • Compact, multipart designer casing
  • Maximum storage tank temperature
  • High level of operational safety through fault diagnosis
  • Temperature display °C / °F
  • Collector overtemperature disconnection
  • Spring clamp terminals allow rapid and easy installation


  • Graphical LCD display with backlighting
  • Animated representation of the systems and operating states


  • Non-verbal menu navigation
  • Side switch for manual, auto, off


  • Holiday (storage tank recooling)
  • Interval / tube collector
  • Anti-freeze
  • Display storage tank top



  •  Steca TR 0301 certificate CE · pdf · 0.857 MB

Product data sheet

  •  Steca TR 0301 productdatasheet DE · pdf · 0,229 MB
  •  Steca TR 0301 productdatasheet EN · pdf · 0.229 MB
  •  Steca TR 0301 productdatasheet ES · pdf · 0,230 MB
  •  Steca TR 0301 productdatasheet FR · pdf · 0,229 MB


  •  Steca TR 0301 manual DE · pdf · 2.011 MB
  •  Steca TR 0301 manual EN · pdf · 2.010 MB
  •  Steca TR 0301 manual ES · pdf · 2.013 MB
  •  Steca TR 0301 manual FR · pdf · 2.028 MB
  •  Steca TR 0301 manual IT · pdf · 2.009 MB
  •  Steca TR 0301 manual PL · pdf · 3.630 MB
  •  Steca TR 0301 manual PT · pdf · 2.014 MB
  •  Steca TR 0301 manual SE · pdf · 0.358 MB

Product pics, technical drawings, etc.

  •  Steca TR 0301 product pic 3D · jpg, 300 DPI, high quality · 1.632 MB
  •  Steca TR 0301 product pic 3D · jpg, 72 DPI, web quality · 0.476 MB
  •  Steca TR 0301 product pic · jpg, 300 DPI, high quality · 2.038 MB
  •  Steca TR 0301 product pic · jpg, 72 DPI, web quality · 0.600 MB
  •  Steca TR 0301 product pic drawing · jpg, 300 DPI, high quality · 0.441 MB
  •  Steca TR 0301 product pic drawing · jpg, 72 DPI, web quality · 0.233 MB

Technical data

 TR 0301
System voltage
230 V AC (± 15 %), 50 Hz
System voltage optional
115 V AC (± 15 %), 60 Hz
1.07 W
Temperature control class
Energy efficiency
1 %
Number of inputs
3 x temperature (Pt1000)
Number of outputs
1 x switch output relay (R1), max. 800 W (230 V)
Turn-on temperature difference
8 K
Turn-off temperature difference
4 K
Ambient temperature
0 °C … +45 °C
Degree of protection
IP 20 / DIN 40050
Dimensions (X x Y x Z)
134 x 137 x 38 mm [0.00 x 0.00 x 0.00 inch]
250 g [0.00 oz]
Solar system, collector, single-family house

Solar thermal systems

Solar thermal systems convert solar irradiation into heat so that it can be used to heat domestic hot water or for back-up heating.more
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