Let's get something straight - the fact that most players I know use cheats to get past the carry weight limit in Fallout 4, Fallout 3, Skyrim, and many other games (Witcher included), is just showing how dated the idea of carry weight is.
The command 'tgm' for God Mode also makes you immune to encumbrance from having too much in your inventory. Before we get started, in order to get past the carry weight limit in the game, you can open the console (~) on PC (sorry console, there is no helping you), and do the following: