It's also possible that the MSW inverters that have given people problems were cheap Chinese trash and now all MSW inverters are getting tarred with the same brush.
Well....
Going back many years the first generations of industrial electronics gave everyone a lot of trouble
Slow switching speeds and really ugly wave forms made some motors run hot.
Under some special conditions of long runs of cable and large motors and drives you could get reflect waves causing voltage spikes that were killing motor insulation and burning the ends of the cable insulation.
These were the neanderthals of drives...
You know I cant even find pictures on google of the stuff I am talking about.
I have a board from a very early SILPAC in my locker at work.
Its so old, so early, the traces on the electronic boards were drawn and etched by hand probably in the 60s...
( dawn of the transistor age )
I am old enough to have worked on stuff with tubes in it.
Man things change fast.
This is the big guy from Creighton #9
It I think still is the deepest single rope skip hoist in the western Hemisphere
What you cant see are the twin Silpac drives from the 1960s that run it.
You can hear the hum and harmonic noises it makes...
It produced so much objectionable noise from harmonics on the AC power system and ground currents that when that motor turned I was scared to disconnect a ground in the building from unrelated equipment that just happened to be close to it because it might draw an arc.
Rest in peace Big guy....
Here's the grand old lady of electric truck fleet 910
Listen real good...
You can hear the howl of the ABB thyristor converter of another truck behind her running up to full power to do a brake test before they rolled off to do a days work.
Video taken on a 2 Megapixel Kodak digital camera....