To achieve the buck/Enhance characteristic, all of that is needed is 2 different switches so which the AC enter is usually connected to one of many two primary faucets, although the load is linked to the other, Therefore utilizing the principal transformer's Major windings as an autotransformer. From Java 11 https://raymondcxqiz.jts-blog.com/32798035/the-smart-trick-of-uninterruptible-power-supply-ups-that-no-one-is-discussing