+25 years in power electronics & renewable energy


Our advanced testing laboratories are able to replicate any temperature, voltage or electric requirement.



About us

As a leading specialist in power electronics including photovoltaic, wind and battery storage system technologies, Wind & Sun Technologies SL (WSTECH) along with its brands FeCon GmbH, Helios Systems, Island Grid and Wind and Sun Service develops and produces a whole range of solutions for the renewable energy, grid and energy storage sectors.

WSTECH’s extensive power electronics experience is embedded in all the products that the company brings to the market sharing the basic principles of high efficiency and reliability, low maintenance cost and long lifetime operation availability.

Our high technology R&D centre as well as the electronics manufacturing factory is located in Flensburg, Germany, while our head commercial office is based in Barcelona, Spain.

Technologies in Renewable Energy

We offer a range engagement for business models.
We will work with you to find the best energy solution.

  • Competitive price

    We achieve the best €/W ratio in the market because we control the entire life-cycle of our products, starting from the R&D up to field implementation.

  • Reducing Cost

    Leverage from our experience in order to control your expenses by getting the most from your equipment and services regarding longevity and reliability, product and service efficiency and management capabilities.

  • Customized solutions

    We offer the services you need so you can meet your business objectives for customer satisfaction to attain greater profitability.