2 outputs, 1 input temperature difference controller

The STR 1 includes everything that is needed for a basic thermal solar system. Apart from the controller for temperature differences an electronically controlled limitation of the storing temperature has been built in. Of course, it is possible to adjust hysteresis, temperature difference and max. storing temperature individually.
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3 inputs, 1 output temperature difference controller

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.
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3 inputs, 1 output temperature difference controller with pump speed controll

The Steca TR 0301sc controller is the speed-controllable version of the basic controller, the Steca TR 0301.
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6 inputs, 3 outputs temperature difference controller

This controller provides everything to operate your solar thermal system safely over a long service life. The Steca TR 0603 controller monitors and controls solar thermal systems with two differently oriented collector arrays and a maximum of two domestic hot water or buffer storage tanks.
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6 inputs, 3 outputs temperature difference controller

As a particular highlight, the Steca TR 0603mc stores the system's operational data on a SD card. The 40 pre-programmed systems and numerous additional functions allow universal use of the controller.
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7 inputs, 4 outputs temperature difference controller

The Steca TR 0704 system controller is a universal controller for solar energy and heating systems. In addition to a selection of pre-programmed basic systems, freely programmable individual system configurations can also be realised.
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