The best thing to do in your case is to get a Kill-A-Watt and measure the consumption of each of your components at various times during playback.
Then you can take your electric bill and figure what the rates you are charged and input it into the Kill-A-Watt. It can give you an idea of what it would cost to run your system 24/7.
you could also do it the hard way and leave your system on 24/7 for a month and compare what you were charged.
I spoke to a guy who had Threshold SA-1 monoblocks and he kept them on 24/7 a long with the rest of his predominantly SS system and it added $25 to his first monthly bill after he got everything set-up.
Then you can take your electric bill and figure what the rates you are charged and input it into the Kill-A-Watt. It can give you an idea of what it would cost to run your system 24/7.
you could also do it the hard way and leave your system on 24/7 for a month and compare what you were charged.
I spoke to a guy who had Threshold SA-1 monoblocks and he kept them on 24/7 a long with the rest of his predominantly SS system and it added $25 to his first monthly bill after he got everything set-up.