The Orion TR Smart manual I can find Victron's website has only one table for Wire/Fuse sizing. It distinguishes between 12v and 24v. I have the 12/12-30 in a different setup but plan to use the 12/12-18 in a new setup. Does anyone know if Victron possibly has a recommendation for downsizing wire Size/Fuse for the 18amp version? If not can anyone explain why the (up to) 16mm2 wire size and 60 amp fuse is required for all 12v versions regardless of output?