To be fair... German electricity prices are round about 6 or 7 times that (I am paying about 24cents/kwh).
But still... Sony announced that the "secondary chip" was supposed to allow just that... and now it really doesn't do it... yet. The standby mode is still buggy for me (haven't tried recently, so it could be fixed by now). Adding downloads via the website of PSN doesn't lead to the console actually downloading it, only when switching it on does it start... which is a bit... backwards it seems (PS3 can do it, when you enable PS+ auto update).
Didn't have a problem like that with mine... Downloads seem to be working pretty well when the consolde is off, by adding them on the iphone app for example. Maybe there's something you need to set up on the PS4 to allow that?