mine is ~50W and less than $3 USD a month!
Cries in German 0.44 USD per kWh ...
Paying 27,23 USD for my 85W NAS (which I need to bring down badly ...) per month. Waiting for a new bill on solar power on your balcony early 2024. Lookin into buying 800W panels and a battery. Should help bring down the operational cost tremendeously.