Yes, I noticed yesterday that the output is limited to 50.0 V on the 5015, as I got the production testing pack to “fully charged”, but it is also limited on the 5020 to the same voltage, so “technically” you can’t fully charge your 12S pack with it, but you can get your cells to 4.15 V which is pretty much full. There isn’t much more energy you can into them at the top end voltages.
Also should help a little bit the pack durability by not cramming it right to the top, which I already was doing on my 10S (charging to 4.17 V / cell on it). Works for my use.
Not sure if I’d want to sell that unit, because possible liability with the safety certifications, but would consider it for personal use. Otherwise excellent power/price -ratio (assuming it performs to spec). Too big IMO for portable-carry charger, but might work decently for desktop use.
Here’s a quick rendering of the comparative sizes of the PSUs. From top:
MW LRS-350
MW SE-600
NVVV S-1200
Here’s an actual image of the two Mean Well units on top each other.
The SE-600 is already a pretty chonky boi in it’s size and I still need to attach the DPS-buck regulator to it. Probably gonna try to attach it in length direction. It’s gonna be pretty dang long unit, but I think it would still fit into my travel pack that way without eating too much space.
I wouldn’t recommend the DPS-bucks (at least 5015 or 5020) for anything higher than 12S, as the output voltage is limited indeed to 50.0 V.
Gonna be pretty big and you need to still ensure you get good airflow if you do double+ stack the PSUs. Not a problem with the MW SE-600 or NVVV S-1200, as they are “blow-through” ventilated, but problem for the LRS-350, as the fan pulls in from the top and exhausts from back.
DPS5015 and 5020 spec "Input voltage range: 6.00-60.00V ", but you need 55 V input at least to get the 50.0 V output, so configuring the PSUs to output 55-57 V would be the sweet spot.
Expensive (200€ @ Mouser), worse power/price -ratio than the LRS-350 or SE-600, but better form factor than the S-1200 or SE-600 for that matter. Also a blow-through airflow. Might make a better portable power charger thanks to it’s higher power and form factor, but at a higher cost.
I’ll keep my eyes on this unit at least for a test unit. 
LitePlacer has been bolted to the table and I have made the hole for the up-looking camera and mounted it. It hasn’t been calibrated in case you’re wondering that it looks crooked. Need to do some office work today.
but excited
