Not too many years back the PURE SINE WAVE models were sort of expensive. That's not so much true today.
I just never use a MODIFIED SINE TYPE Inverter where transformers and electronics are involved... I have a 600WATTs PSW AIMS Models that just cost $149 from AMAZON that works fine for as my duty INVERTER for all of those small wattage items we all want to use.
I ran two multi-head extension cords from this Inverter with one going to the Home Entertainment area and the second extension cord to the bedroom area. This gives me access to most of the things we like to always have on whether we are camping at electric sites or off the power grid.
Being a PURE SINE WAVE I do not have to worry now about what my family or visitors might plug into it.
My 600WATT PSW Inverter unit is ON all the time even when we are at Electric sites. Kinda neat to have several of my must have low wattage items being powered up no matter where we are at.
I have a couple of 300WATT MSW Inverters left over from the past and these are used only for powering up outside lights and such... Two things that I have lost using these MSW models was a 20-inch box fan and a Electric Blanket Controller. I was charging my computer using one time and the transformer brick was too hot to touch...
Its all second nature now - never worry about it anymore...
This is just me doing this - there is alot of others that doesn't seem to have any problems using their MSW model Inverters. I just never could make myself chance it after I burned up a few things...
Roy Ken