I have this device and have been using it for a week now. This is my first pre-built portable battery system so I don't have much to compare it to, but so far it has been really solid. Everything feels really well thought-through and solid (the buttons don't feel cheap; even the plastic case feels pretty rugged).
Solar inputs are *definitely* a major weak point, but AC charging is VERY fast and the phantom drain has been really easy to manage with physical buttons to toggle the AC and DC outlets right from the front of the device.
I'm still working out how to panel this thing in order to optimize as much as the 300w input as possible. It is limited to 30v and 10a so that *really* constrains things -- this seems like an odd choice from Anker given how fast you can charge via AC.
It also uses xt60 connectors -- it isn't super hard to find adapters, but it definitely will add some complexity into the solar input setup.
No mention of how AC charging works on the site, but I’m guessing it has a power brick.
No power brick -- it is a standard C13 cord (same as a computer/server).
I've been testing it mostly for pass-through power in my office -- so far I'm really happy with it, but I'm taking it camping this weekend so that will be a bit more of a true test for my own use-case.
I'm not willing to disassemble this (I want to preserve as much of the 5yr warranty as possible) but barring a tear-down, if anyone is looking for additional details about this unit or how it performs feel free to let me know.