99% of my stuff is Anker. I looked at the C1000 but the main reason I went with the EF D3 is because it does a much better job with inductive loads. I picked the EF over the Anker because in a power outage during a bad storm - I can yank the EF from the printer and run it to the basement to power my sump pump while I get the generator fired up.
I lost thousands of dollars worth of stuff in my basement ~6 months ago due to flooding - and I now have a triple sump setup with battery backup but the EcoFlow is a backup to the backup - I’m a bit paranoid over it now due to how much I lost. Most of the loss was priceless irreplaceable family stuff / sentimental stuff - but I also lost my treadmill, a 1/2hp chiller for my brewing, among other electronics and stuff I had down there.
Insurance made me whole on stuff that could be replaced but still, it sucked.
The C1000 would work perfectly for the printer alone, but is weak when it comes to inductive loads like motors.