I second that, easier to manage load below 1000W rating.
More than that, need to go 220V to avoid fire in house wiring.
Kinda like the turn key solution of the S7-LN and ( relatively ) low power.
S7 Board slots is nice design improvement over the S5 too.
Don't have to unscrew everything to get PCB access.
Glad they keep it that way for the S9