mkc

Thanks @mark !  I just wanted to verify that 4'5" is the absolute minimum space a machine takes up when not used.  I completely understand needing to have room around it to use it, but I'm trying to figure out "storage" footprint when not in use (every inch helps!)
Michelle

The main power fuse on a Lenni is 3.15 amps which is the equivalent of about 400 watts.  You want a unit with zero delay and that is what dual conversion will give you.  Not to say you can’t get zero delay without dual conversion.  I’m not sure if the Lenni will tolerate a delay switching to a backup but I know the Millennium won’t.  If you are quilting along and the power goes out there is an excellent chance the needle is in the fabric, you will tear the quilt.  In my opinion buy the smallest dual conversion back up,  you just need it to keep the machine running until you can stop moving.  
 
Just my two cents
Nigel

The important take-away is adequate power (have seen it listed as 1000 VA pure sine wave for non-fabric advance, non-Quilt Path and 1500 VA pure sine wave for the bigger/more complex machines).
The models in the above graphic might be older.  Personally, we run APC equipment for our UPSes (we use them for computer networking equipment and security cameras).  I've had issues with loose-fitting connectors and poor customer support on CyberPower.

Congratulations!!!