Amps and volts from EVSE are reported live? So if you use the JB's remote and use the "OutC-" button to reduce the amperage, the limit gets shown on the Page 2 numbers display right away?
I'm the JuiceBox whisperer...
I helped design the newer JBs and am the last guy standing in support of the old ones, so I can almost definitely help explain why it's saying 53
Unless it's hard-wired, you don't want to exceed 40 amps anyway (on a 14-50 outlet)! The "60" was just a unit maximum rating slapped on the label, but all JBs were built-to-order with cables usually rated for 32 amps. They usually started off set at 30 amps.
Yes to your first question, also the HV amp draw (D) changes right away.
I love my Juicebox Premium, my first L2 EVSE! It's built like a tank and has never given me a problem, only drawback is it's quite heavy and bulky for a portable EVSE(which was a main reason for buying it years ago). My(factory built) JB has a 14-50 plug but funny thing is it has a molded plug but only has 10 gauge wire, that and the metric equivalent of 10 gauge for it's orange J1772 cable! I always thought it was a lawsuit waiting to happen(if it indeed could put out more than 30a)......back then(as I'm sure you are well aware) JB seemed to be a more seat of the pants
company, more designed for techies like myself and other members on MNL than Joe Six Pack
Up until now I wasn't sure if JB limited the actual output current of my EVSE to 32a(max for it's J1772 cable) or not. Like I thought they did not and just rely on the user(myself) to not exceed the maximum of either my circuit, J1772 cable or input cable. Personally I like being in control and not having the JB nanny me, of course lawyers don't see it that way
My JB Premium has all options except WiFi which I was not interested in, I much prefer my little RF remote to having to use my cell phone.
I'll probably never exceed 30a with my JB(I'd have to replace both power cable and J1772 cable) so it doesn't really hurt it stops incrementing at 54a, just was surprised it did as the big sticker said 60, again not that I'd even use 1/2 that.
Oh not sure if you noticed as I updated it after I originally posted it, but I did add a bit more to the end of my post before this one, explaining a few more of your questions about the LeafDD screen.