Been thinking of posting the same comment. Well done.The SS Growatt 5000ES has lots of features that are useful for DIY solar/battery/grid sharing that some of us want. You can run up to 430 volts of solar into it at up to 18 amps so each additional 5000ES that you add gives you everything you need to add another 6kW of solar to your system. (e.g. 6KW west facing roof, 6kW east facing roof, 6kW south facing roof. You can even run the inverters off solar alone or solar with grid sharing without batteries for self consumption. As for the "European Model", in the settings you can select 240 volts and 60 Hz. Signature Solar already addressed the AT issue by working with the Growatt team to have the NG bond removed before promoting it with an AT for split phase in the North American market. They are addressing the concerns that some have brought up. The one that I am now running with an AT is working flawlessly and there are no current flowing through the ground bus-bar to the ground rod. I will add another one in the spring when I increase my new solar to 12kW. My opinion is that the 5000 people/units who have bought these 240 volt 5000ES(US version from SS) did so because thy have specific requirements that these can meet for a low price. D. Pos likes them because they work for him. Two of them with one AT gives him full use of his solar capacity and has the added benefit of increasing the surge capacity, more like a low frequency inverter. I also have a 12kW split phase Aims inverter with a grid pass through and the ability to absorb huge inrush currents but its now priced at 4500$ US. When I'm done I will have spent 3 X $900 GW 5000ES/US + 1 X $350 (AT) or $3050 for 15kW of 240/split phase self consumption solar power.
So now you know why someone would choose the 5000ES US product over your LV6048. Two of those for the same price as 3 of the 5000ES and an AT would only give you 12kW without the added headroom for large inrush currents.
It would make more sense to say that you don't have a requirement for the 5000ES in your application than saying "What I don't understand, is why anyone would buy the ES and mess with these auto transformers at all". How do you think low frequency inverters make 240/120 split phase in the first place for the NA market? They just use a transformer with a center tap (an internal AT).
You forgot to mention Grid Sharing, another plus for those without batteries or when your batteries are low but the sun is out.