Since there is no interest in feeding into the grid here, I would only ever use inverters with such an unclean grid. High-power AC DC chargers on the grid side … such as Eltek, Huawai or meanwell
You could then use a multi if you want to add PV on the AC out side later. Otherwise you would really have to use an RS 6000 … because I think the topic of grid conformity is not an issue in the Ukraine … they are then also HF inverters and cannot hum.
But if the grid frequency and / or the voltage drops, they also disconnect … so again the chargers with a very wide voltage input …
take a look at these Voltage …