On the other hand, if you can, please consider using a more energy efficient alternative (and/or ensure you're getting the electricity from green sources) - the planet will warm up regardless of whether the electricity was cheap or expensive.

My total household usage averages around 4.5KWh/day so adding that 45W 24/7 server would add about 24% to overall load! It would need to be an important little server to justify the increase.