That's what they call it when a new telescope first sees the sky... I think it applies just as well to a solar panel. This is the one you saw me building earlier.
In the early morning light (impatient, yes I know), it was producing 5.5 amps at 24 volts. That's 132 watts, actual. Not calculated, not predicted - actual.
And there was a big fat spark when I connected up the ammeter - do you have any idea how satisfying that is?