Pure Sine Wave Inverters best quality manufacturers?

My 300 watt GoPower has powered my fridge just fine in transit. I used a transfer switch on the branch circuit needed instead of powering up the entire panel.

https://www.donrowe.com/KISAE-TS15A-Automatic-Transfer-Switch-p/ts15a.htm

I prefer separate components. Easier to bypass and replace when something fails.