I would avoid the userbenchmark site, the owners are heavily biased against AMD, so their benchmarks cannot be trusted

https://wiki.archlinux.org/title/Network_configuration#Revert_to_traditional_interface_names

What’s the average price during normal times? In Germany we are usually paying a fixed price, so fluctuations on the market do not reach the customers. However, this price is somewhere between 30 and 40c/kWh.