Solution for A/C Condensate Drain Line that doesn't require emptying a bucket of water every day?
While you can't have it drip off the balcony, you can turn it into a fine mist and blow it off. Even a fine sprayer would work fine, but you'll need a float switch to auto-activate it, and a pump.  On the plus side, this will air condition your balcony as well.

Home Depot has a  bucket-top misting fan that looks like it would solve your problem. You would need to hook it up to a battery or adapter.