Added: I wouldn't trust the ENDAMP function (at face value) unless you are using a WBjr. The WBjr sees exactly what goes into the bank (Already calculating for background loads) so you get an accurate ENDAMP. Without it, as I had lived for a couple years without one, you have to add a few amps to the ENDAMP number to get a rough estimate. I figure that when everything is idle in the house it still consumes 2-3a, so I setup the ENDAMPS to be 8 rather than 5. Since purchasing the WBjr it is safe to bring it back to 5.
I also like having the WBjr because it allows you to fully use your system as soon as you wake up because you do not need to compensate for heavy background loads (possibly over-charging your LFP pack) as it knows what is going in/out of the bank.
In other words.... ME = Happy camper!