At the beginning of 2021, we at ADLER developed and certified our own range of gPV fuses, satisfying the increasing demand on higher fuse
calibers. A strategy mainly focused to reduce the quantity of string combiner
boxes used in a PV Utility scale installation.
After a extensive engineering and development work during the
last few years, our engineers decided to use the normalized, IEC-compliant 22x58 mm fuse sizes instead of the other common sizes, such as the 120x27 mm, which, beside its
longed design of 127 mm, exhibited poor thermal performance inside combiner boxes.
The final size of 22x58 allowed the best physical
material properties for that kind of fuse within this size and covers
fuse-ratings from 35 A up to 80 A at 1.500 Vdc and it is UL-certified.
In the development of such innovative, new products,
we worked closely together with string-combiner box manufacturers and thanks to
these active collaborations, we reached an important conclusion: technical
studies show that our products reduces the need of combiner boxes by three
It seems paradoxical, since less combiner boxes would mean
less business for these manufacturers, but in fact, it is an opportunity to
refresh this market and helps to strengthen the Central Architecture. We are
sure, that this will bring new capabilities to these manufacturers and additionally
diversifying and pushing new businesses around the combiner box market.
The Central Architecture is still the predominant way to project current PV plants, and the engineering, EPC’s and the whole chain of suppliers are continuously improving its efficiency and reducing costs. So, ADLER’s new products will ensure the global electrical efficiency and keep making the Central Architecture as the main resource-conscious way to setup a PV Utility scale plant.