Our products and systems generally use solar radiation to generate energy. Our high-efficiency solar modules achieve a real electrical output of over 200W per m2 at full sunlight (approx. 1000W/m2). The solar radiation mentioned is obtained in the midday hours everywhere on earth in the range of approx. -65 to +65° latitude, whereby in regions further away from the equator (e.g. Germany with approx. 50°) this value is only reached during the summer time. During winter time the solar radiation is reduced to approx. 80%. Due to the longer lasting days in the summer months June to August we have about the same average daily energy yield (= irradiation power times time) as near the equator. The diagram shows the monthly values of Hamburg and Vera Cruz (Mexico) in comparison. In Germany we have a clearly lower energy yield during the winter. During summer we can certainly keep up with sunny regions. So in our latitudes solar is worthwhile!
In diffuse daylight (cloudy or shaded areas) and in indoor areas with artificial light, the irradiation values are dramatically lower, as shown in the following table for typical irradiation areas. This is in contrast to the logarithmic perception of light by humans. Nevertheless, solar cells can also be used under these conditions. The devices operating with the solar cells require a correspondingly low current. A feature of our high-efficiency solar cells is their good performance at low light intensity which is why our small modules can also be used very well for indoor sensors and other applications in need of a power supply.
The core of our products and systems are solar modules, in which we install rear contact solar cells with 22-24% efficiency. These monocrystalline silicon cells are world leaders in terms of efficiency and are manufactured in a much more complex process than standard solar cells with a typical efficiency of 15 – 19%. They are therefore significantly more expensive, but also have other advantages such as good low-light performance, no degradation (no loss of efficiency) even after 20 years of solar radiation, no shading effect, homogeneous contact-free dark blue surface, etc. We embed these solar cells in a special material system developed by us consisting of fibreglass reinforcement on the back, polymer encapsulation on the front and reliable contacting. The resulting solar modules are ultra-light, semi-flexible and yet mechanically and climatically highly resilient. They also have a dirt-repellent surface and are almost degradation-free even after many years of outdoor use.
We embed these solar cells in a special material system developed by us consisting of fibreglass reinforcement on the back, polymer encapsulation on the front and reliable contacting. The resulting solar modules are ultra-light, semi-flexible and yet mechanically and climatically highly resilient. They also have a dirt-repellent surface and are almost degradation-free even after many years of outdoor use.
In addition to our own solar module designs, our solar products and power supply systems also use components such as batteries, electronic modules and cases, which are also developed or qualified by us. Here, we use state-of-the-art components and technologies to achieve maximum efficiency, performance and service life: high-quality Li-polymer batteries, MPP converters with up to 97% efficiency, semiconductor components with the lowest losses, etc. Our housings are made from UV-resistant, robust materials that are pure and therefore recyclable. To some extent, we also use novel plastics for this purpose, which are mixed with genuine wood or natural fibre components. Premium versions of our products are handmade in combination with unique materials such as cherry wood and natural cork. We are the first to combine natural materials in this form with solar energy. That way we contribute to sustainable production with unique design.