On a per-transaction basis? No.
Those costs specifically end up being reified in the fee those processors charge to their customers, so we can determine an upper limit to how much is spent on energy in that way.
Those costs specifically end up being reified in the fee those processors charge to their customers, so we can determine an upper limit to how much is spent on energy in that way.
We don't really know the relationship between transaction rate and electrical usage in a mature BTC system, because mining is mainly used to prevent double-spends and the minimum required mining rate to support a given transaction rate is a game-theoretical concern and not a technical one. We can only really observe what has happened so far in the Bitcoin ecosystem.