In case you care, I use 2 techniques when actually using my electric BK. Since you have same PID you can probably do the same:
When I am going to be around to watch BK closely, I set it to manual mode 100%. Since I batch sparge, I do this at first run-off. Usually I'm about to a boil when the second sparge is done (I generally use 2 equal sparges).
If I'm not going to be watching closely (I'm always in the basement, but I may be tending to kids, racking something, eating, etc.) I set it to Auto around 200 degrees. I do this after first run off. I can then do whatever I need to do, and come back to the BK. It's usually holding steady at 200, then I'll flip to manual 100%. Only takes a few minutes to get boiling. This is what I really like about electric, I don't have to watch it like a hawk every second. (Disclaimer: pay attention, don't follow my example, etc.)
I can usually then turn the PID to manual 60% or so to maintain my boil in my insulated BK. It has a single layer of Reflectix on in. I probably need to add one more layer, as it's pretty warm to the touch when boiling - I may could cut it down to 50% or so. When I recirculated through my plate chiller to sanitize it, I bump it up to 75% to overcome the slight heat loss for about 5 minutes, then turn it back down to 60%.
Electric brewing rules! It took me about a year of piecing together info before I built mine, but I can't imagine it any other way. I'm sure you will enjoy it.
