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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Steca Elektronik GmbH

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

Mail: info@steca.com
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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 electronics,
Battery charging systems

Fon: +49-(0)8331-8558-100
Service: +49-(0)8331-8558-833
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Mail: info@stecasolar.com
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Constantly in the limelight: Feedback from experts, customers and the media

coolcept, inverter, limelight

Winner of multiple awards

The StecaGrid 3600 has already been in the limelight many times. The specialist journal Photon Profi describes it as the master of all classes, while the AIT (the Austrian Institute of Technology in Vienna) has confirmed its exceptionally high efficiency, and it has also won the Bavarian Energy Prize, awarded by the Bavarian Ministry of Economics to the best inverter in the world.

Simply unbeatable

It is not just among specialists in journals and institutions that the inverters in the coolcept series enjoy a high degree of positive feedback. The devices are also regularly recommended on www.photovoltaikforum.com. Opinions concur across the board: a high degree of efficiency, reliability, low weight, noiseless operation, free guarantee extension to seven years, low power loss – the list can be endlessly expanded, or to put it in two words: simply unbeatable!



press, confirmation, customers, test

Our customers are delighted

»Better to mount 10 STECAGRID than one... – you
can do it all by yourself, without a body-building course.
These things are unbelievably light!«

»Here, Steca has developed a completely new product,
which also provides protection against overheating due to
the simplicity of the components (Mosfets)..«

»So small, but with a Euro ETA efficiency of over 98%.
This alone puts them in a league of their own
above the other products which are always so highly
recommended ...«

»I would always choose these devices in preference to the
excessively priced inverters from ... – particularly since STECA
offers a 7-year guarantee which is also available via the
Internet.«

The press confirms

»...German competitor Steca Elektronik GmbH demonstrates just
how new market shares can be acquired with technical innovations.
The company‘s „Coolcept“ series [...] encompasses small
and light-weight single and three-phase devices in the lowest
performance class (under ten kilowatts) that are superior to those
of SMA in terms of their combination of high efficiency, compactness
and low cost. Steca‘s market share in this device class in
Germany continues to grow as SMA loses ground. ...«
Extract from article „The clueless market leader - SMA must reassume
technological leadership to survive“ (Photon, 4/2015)


»It met the great expectations. Thanks to its new,
innovative topology the StecaGrid 3000 can rightly call
itself the new champion of all classes.«

»It works with previously unheard of efficiency and can
be produced in largely automated and cost-effective
processes with a minimum number of parts.«

»... the Steca tops the test ranking and disproves the
dogma that small inverters are less efficient and have
higher production costs than large ones.«

»The new StecaGrid marks a new beginning for the
profitability of small systems.«



coolcept, inverter family

Product overview coolcept inverters

All single-phase and three-phase coolcept inverters are extraordinarily cool, efficient and durable. In addition, all devices are extremely lightweight and quiet. Nevertheless there are differences for planners and users.more
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coolcept, inverter, Topology

Steca's inverter topology coolcept

coolcept is Steca‘s new inverter topology that provides­ the highest peak efficiency. The patented coolcept topology is a global innovation that is only available from Steca.more
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