It is one of the most up-to-date topics within the Solar Power Industry to improve the efficiency of that complex process of energy conversion. Every single tenth of a percent is welcome – although > 90 % is already state-of-the art for modern DC/AC converters.
Following this target, more and more producers of photovoltaic inverters are currently replacing standard components by high tech solutions providing the best possible electrical efficiency. One of those examples are the chokes in the EMI filters on both, the DC and the AC lines.
Nanocrystalline cores offer a permeability being five times higher than ferrites which results in significantly smaller build volume and – as a consequence – the copper resistance is reduced significantly, too – typically by about 50%!
It is a realistic option, to replace an existing 2-stage EMC filter based on conventional Ferrite chokes by a single-stage solution based on a nano-choke, which provides a similar attenuation but with lower losses.