This explains the type of problem my area has, and why I also prefer using voltage regulators. The smart meters used by my utility creates voltage irregularities that increase the risk of damage to sensitive electronics like Bitcoin Miners:

http://www.smartmetereducationnetwork.com/dirty-electricity-and-smart-meters.php

I'm not overreacting. I've had very serious problems that only a combination of surge protection and voltage regulation can solve. I'm not talking about health concerns, I'm talking about the voltage going out of an acceptable range, which in turn causes amperage to go outside of an acceptable range. If, for example, the voltage drops too low the amperage will go too high which will in turn cause the line to overheat. The voltage regulator prevents the type of power irregularities that can lead to fires.

This is the voltage regulator I use for my 120v devices:



Similar to the watt meter and surge protection issue, the company that makes these also makes a 240v version, but it's designed to handle European outlets, and because of the frequency difference it probably wouldn't work right.