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.




The success of a project is determined by well thought out and coordinated processes, combined with the expertise, flexibility and experience of a modern service company. Steca has mastered these different steps and processes and guarantees completion to deadlines, consistent high quality and an excellent price-performance ratio.


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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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We would be glad to hear about your ideas and questions related to our company, our products and services - send us a message, we will get back to you right away.
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Steca Elektronik GmbH

Fon: +49-(0)8331-8558-0
Fax: +49-(0)-8331-8558-131

Mail: info@steca.com
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Electronics services
Electronics, Development Services

Fon: +49-(0)8331-8558-240
Fax: +49-(0)-8331-8558-131

Mail: Michael.Ackers@steca.com
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Solar and Energy
Solar electronics,
Battery charging systems

Fon: +49-(0)8331-8558-100
Service: +49-(0)8331-8558-833
Fax: +49-(0)-8331-8558-132
Mail: info@stecasolar.com
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Domestic hot water controllers

Heating controller, Domestic hot water, Domestic hot water technology, Domestic hot water controllers

High performance technology for maximum convenience

Heating drinking water energy-efficiently and hygienically is the responsibility of demand-dependent fresh water technology. It considerably reduces the risk of contamination and legionella multiplication.

If fresh water is withdrawn, the domestic hot water controller detects the removal and has the discharge pump withdraw hot water from the buffer storage tank via the plate heat exchanger. The plate heat exchanger heats the water using the continuous flow heater principle. The domestic hot water controller controls the pump speed of the discharge pump so that the hot water temperature is kept constant at the value set even if the withdrawal quantity changes.

This intelligent control system guarantees low return temperatures to the buffer storage tank and unrestricted hot water comfort.

Fresh water technology is the ideal addition to all heating systems which use buffer storage tanks: e.g. solar thermal systems, wood-fired boilers, heat pumps and water heating stoves.



Steca TF B001

Domestic hot water controller (compact)
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Steca TF B202

Domestic hot water controller (compact)
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Steca TF A603 MC+

Domestic hot water controller (stand-alone)
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Steca TF A603 MCK+ / TF A603 KS+

Domestic hot water controllers (cascaded)
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Fresh water technology, fresh water, fresh water controller

Fresh water technology

Direct, fresh and hygienic drinking water heating using the continuous-flow water heating principle: In a fresh water station, the hot water is only heated when it is actually required.more
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Steca, fresh water laboratory, Test stand, 4-way fresh water cascade

Steca fresh water laboratory

In the Steca fresh water laboratory stand-alone and cascadable fresh water stations of various capacities can be tested and optimised using different thermodynamic influences and different parameter values.more
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