It’s a common misconception that DC-AC Inverters are capable of any single output exceeding 120V @ 10A. The maximum possible load on any inverter is dictated by the receptacle or hardwire terminal provided. Without exception all manufacturers outside of the US use 10A US IC receptacles or surface mount GFCIs. Only Xantrex/Schneider Electric, AIMs, Magnum, and Sigineer use 20A GFCIs receps from what I have seen. The end result is multiple 1200W receptacles but no inverters that have the correct gauge terminals to support a continuous 120V 5kW output.
Recommended wire size for a 12V 5000W pure sine inverter would have:
Wire cross-sectional area (A)
209.5kcmil
Wire gauge
0000 (4/0) AWG
Wire diameter (d)
0.4577in
Therefore, no 12V inverter on the market is capable of more than 1250W from any single IC receptacle except for the few with 4 posts instead of 2.
The AC terminal blocks on the amazon toys are questionable, with the renogy being the only one with a positive review but all using 12AWG stranded. As far as inverters go, there is no justification for mod sine or underrated designs.
Please be careful out there, as any inverter input terminals will dictate the maximum safe load that can be utilized and it rarely matches the label.
If you are an inverter manufacturer and you have a 2000W pure sine wave inverter that has 1/0AWG post input and 10AWG AC terminal block output you are on the right track and I would be happy to review your product.