Whilst I'm aware that these are again, necessary evils to prevent data loss I think It's a good idea to field as much info as possible so that we can see the whole picture.
In the vast majority of cases I think that people will sync when necessary without making a special trip home just for that one purpose, not every time there is a small change like iCloud does.
A 500KVA transformer based UPS whilst idling might consume 36KW. These will in 90% of installs will be paralleled, probably 4 units but up to 8. So that's 144KW per set. 2 of these sets will very likely feed a downstream static switch, that in turn feeds a bank of servers, (that will have again multiple redundancies).
288KW with no load on them.
(This set will make up only a fraction of a large data centre).
I'll forget cooling requirements, security guards, IT staff, losses through cable and switchgear and other factors.
What I'm saying is that there is a price to pay for this 'always on' that we enjoy. Just don't lets pretend that we're Ok because we're using green power.
Matt I agree with you.