SOLARWATT has more than 25 years of experience in producing solar modules. In 1998, the company presented the world’s first glass-glass module. Since then, the Dresden-based company has become the European market leader in this product segment.
All SOLARWATT glass-glass modules are manufactured in Dresden and are very lightweight, extremely durable, and long-lasting. They are built with 2mm thick glass panes protecting the sensitive solar cells from both sides. Glass-glass modules offer an excellent price-performance ratio. The returns per Euro invested are more than twice as high as conventional modules over the long lifetime of the glass-glass modules. The performance of this technology has been proven by accelerated aging tests such as the "Damp Heat Test" (DHT). Glass-glass modules suffer only about 0.6 percent performance loss after 5,000 hours. Under the same conditions, the power loss of a conventional glass-foil module is more than half the nominal power.
Product advantages: robust and durable
The modules are suitable for installations on pitched and flat roofs. They can also be used for demanding roof shapes and are optimized for installations to the existing roofing. The different module types enable the use of almost any roof for supplying self-produced solar power.
In the conventional glass-foil module construction, the solar cells lay outside the composite material and are protected only by a polymer coating from behind. When the module is under pressure, the cells are stretched leading to cracks. The resulting dead cell areas lead to a significant reduction of module performance over time. In contrast to glass, foil is permeable to oxygen and water vapor and ages demonstrably during the service life of a solar module. This leads to degradation of the cells and reduce their performance. In contrast, the solar cells of glass-glass modules are embedded in the neutral axis of the composite of transparent EVA film and glass. The cells are only stressed by bending, which is no problem for them. The two glass panes also protect the cells from possible environmental influences. Neither moisture nor oxygen can reach the cells and cause premature aging. All this means that they last one third longer than glass-foil modules. These are generational modules reliably generating power for decades.
In a world where extreme weather with storms and hail occurs ever more frequently, the durability of solar modules against volatile conditions becomes increasingly important. SOLARWATT glass-glass modules exceeded the requirements of the IEC hail impact tests several times over. Instead of the required 25 mm hailstones, SOLARWATT modules were tested with 45 mm stones at a speed of 23 m/second. The modules passed with excellence. With its thermally hardened 2 mm glass, SOLARWATT is the only module manufacturer to meet the requirements of hail class 4. SOLARWATT glass-glass modules are more resistant than other modules to large hailstorms and other extreme weather conditions.
Since products in the premium segment are not only characterized by innovative technologies, but also by comprehensive service, SOLARWATT offers a full service package for its glass-glass modules. The company offers a product and performance guarantee of 30 years, because the product value is self-evident. To offer the greatest possible service to system owners, the customer-friendly product warranty essentially only excludes the consequences of improper handling. The performance guarantee ensures that the glass-glass modules still have 87 percent of their rated output after 30 years. In addition, further costs are borne, e.g. for the transport of defective modules or installation in case the modules should need to be replaced.
Some things cannot be covered by guarantees. This is why not only our glass-glass module customers, but also customers of our batteries, receive an additional 5-year free insurance - the SOLARWATT FullCoverage. This all-round insurance offers protection against weather damage, loss of yield in the event of defects, theft and vandalism as well as reduced yield if the solar system unexpectedly fails to deliver the predicted amount of electricity.
In-Roof modules replace tiles
The product portfolio also includes the innovative in-roof solution – EasyIn. It replaces the roof tiles and offers an esthetic alternative to the typical mounted PV system. Owners of an in-roof solar system receive a self-financing roof producing clean, free solar power. The proven glass-glass technology and a patented framing system ensure that EasyIn is just as robust and long-lasting as a tiled roof.
The Vision 60M black glass-glass module, which is black throughout, is equipped with nonglare front glass. This glass allows solar systems in areas where sunlight must not be reflected, such as in densely built-up housing estates, where glare effects are particularly disturbing. The glass conforms to the recommendations of the European Aviation Safety Agency (EASA), so that it can also be installed on buildings near airports.
Overhead modules produce energy and provide shade
A veranda covered with solar modules or a carport with a solar roof - the frameless Vision 36M glass-glass modules from SOLARWATT provide an eye-catcher. Due to the transparent areas around the individual solar cells, they provide several features at once: they generate electricity, allow light to pass through and provide shade at the same time. The glass of the modules is slightly thicker (4 mm) so the design does not require a frame and is also suitable for overhead glazing. In 2014, the German Institute for Building Technology (DIBT) granted SOLARWATT the General Building Inspectorate Approval (AbZ) for the Vision 36 M glass module. The approval procedure for a framed glass-glass module with 60 cells is currently underway. Being granted the AbZ, the Vision series module is the first SOLARWATT glassglass module with standard dimensions for overhead glazing. It can be used in private and public areas without requiring separate approval.