I don't think everyone understands how much it cost to build your own with everything included in these power stations..I have built a couple playing around and have one right now built to be portable like a power station...
Smart battery box with all the goodies(outlets)..Napa $50
100ah LFP battery with ganfeng cells(Zooms)...........$310
600 watt PSW inverter(Giandel)........................$100
Cheap PWM Renogy controller...........................$30
That's right at $500 for a 600 watt power station..Add a 1K PSW inverter and an MPPT controller and it goes up almost $200..
It's not cheap to clone a power station..