I don't think the above is correct.
You're first expression Q=CV describes the charge available from a fully charged capacitor.
But on the second expression,
1. when it's fully charged, it won't admit current.
2. The d.c. charging current is an inverse-exponential function over time. Rather than me typing the theory out in this Forum, you can read about the d.c. charging characteristics here: http://en.wikipedia.org/wiki/Capacitor
Taking this further, what you'd need to calculate are the losses over time from parasitic losses, coupled with any ripple losses, and then integrate (through the charging function) over time to calculate the average charging current.
I assume from your question, through, that this is a d.c. supply?
If the supply they are connected in is a.c., losses are a little more simple to calculate: simply use the parasitic resistance in parallel with the capacitive impedance to calculate your real and reactive power losses through them.
EUR ING Graham Kenyon CEng MIET TechIOSH
Principal and Proprietor,
G Kenyon Technology