I have been using FMA's 10s charger (a predecessor model of 10xp) for over 7 years with great success. The DC power to each 10s charger is a 350w AC-2-DC converter. Three of such converters run in parallel against a single 110v AC. I can charge 3 10s packs in parallel very reliably. Triple redundancy is also a big plus with this setup.
