Hi,
The power is always provided through the triac, so is implicitly "dimmed" even if the channel is at full. Betapack2 does not have a bypass or "non-dim" circuit. The test output level is hard-coded in the design - it's notionally "@FUL" but this is not the same as direct undimmed AC.
This is not recommended as explained above this is still a notionally "dimmed" output and will be chopped by the output triac, even if only to 1-2% - i.e. it's not clean AC. Your LED fixtures will almost certainly use a switched-mode powersupply, which will not take kindly to an "unclean" AC supply.
Unfortunately you need to get installed some "hard power" (i.e. normal mains AC) outlets, correctly protected for overcurrent and overload (and probably with RCD), into your venue, with which to supply your LEDs. (I do sympathise, I've had to do the same thing - my main venue has Betapack1 and Betapack2).
Google is your friend. I just searched and found them straight away. Zero88 will not provide these to you and you need to self-certify that you are competent to use the information from a safety point of view. ...but you will find what I describe above and your electrician friend should conclude the same.