IMHO- either HF or LF is acceptable- if you run them within their limits...
I have a 12kw 230v LF (36kw for 20 seconds) which will be running my house and the shed (when the house is finished)- mostly because of large loads that have extended starting times (a mill and lathe being the worst offenders- the lathe in particular can take several seconds to 'get up to speed'...)
In the meantime, I have been using the 12v 8kw (16kw for 500mS) HF one to run the shed and the caravan- and it works just fine on the welder and plasma cutter- its been running 24/7 since 2020, and was originally fitted to my 'work' ute to power tools with (hence the 12v) back in 2014 but as the caravans internal circuits (lights, waterpumps, inbuilt TV etc are all 12v, it made more sense to pull it out of the ute (especially now I am 'almost fully retired) and stick with that during the shed, and now the house's construction- the big Sigineer 48v LF one won't be installed until the house is finished...
Having installed, used and repaired thousands (tens?? hundreds???) of inverters over 40 years plus of doing offgrid, marine and motorhome (RV) installs- I can't think of a single case of one failing with HV DC on the output... and the majority of those by far were HF (LF really only make sense for home based systems- LF is just too big and heavy for mobile applications...)
To compare- my HF 8kw can be picked up in one hand (about 12kg) where the 12kw took three people to lift it int the cab of the tilt-tray, and I unloaded it using the winch and pulleys!!! (72kg)
This
![1716600554530.png 1716600554530.png](https://diysolarforum.com/data/attachments/217/217462-4b745bafecb3f3c92fda71ea827714f8.jpg)
versus this...
![1716600630879.png 1716600630879.png](https://diysolarforum.com/data/attachments/217/217463-ae5c54f194bb96e3fab404fae8d03b75.jpg)
Only 4kw between them- but yeah, one hell of a weight penalty...
(I still have lying around an old 1200w LF inverter from my first offgrid house back in the 1980's- its about the size (and weight) of a besser brick!!! the same HF inverter is smaller than a box of tissues, and not much more than that in weight....)
There are advantages and disadvantages to both- HF is a lot more 'economical' to run in standby mode or when output currents are low (the idle current of LF is even today horrible in comparison)- but LF is definitely superior when it comes to handling 'peak' loads (especially when dealing with larger electric motors starting 'loaded' for example- large A/C, water pumps working against a 'head' and the like)
The nonsense the OP quoted in their original post from utube (and yes, it is spreading fast, unfortunately, I have seen several almost identical posts saying almost the exact same thing) is complete garbage, but unfortunately 'youtube university' is where many get their information from, despite it so often being completely wrong....