Across the world it would be very hard to put a number to that question. Also, there are different forms of 'waste', depending how you view it. There's transmission losses, and there's people leaving...
No reliable estimates are available for the total amount, but it is substantial in the US and around the world.It should be noted that electrical generation is inherently "wasteful," because...
One charger with no load does not use much energy, but it is 100% waste. When you consider the aggregate effect of thousands or even millions of tiny waste loads, it can add up to a lot of wasted...