European/Australian generators

Your country seems to be in a bit of a bind at the moment .
It should improve once the current political term ends.
There are a lot of inverter generators even at 110 volts default should not matter.
I would look for 60 hz and at least 3500 watts ,that will easily recharge a stark.
A bit of online research should get you there.
.https://www.cummins.com/generators/onan-p4500i-inverter-portable-generator
This type of thing would be the go unfortunately it says currently not available.
4500w would be good if it has( idle down)meaning it only runs as hard as it needs too for the amount
of current you are drawing and will be far more economical to run.
Pricing was 2500 us dollars that was before the tariffs .
There is a mountain of options here and they are cheap in australia.

Here is a decent one:

Oh boy, tariff talk has made its way into forum discussions again... truth is most have no idea since they get educated from msm.

Truth is that generator linked above used to be over $1000. I price shopped it for months before going a different route. Thanks to tariffs it's as cheap as $915 now (???).

The 3-4 years of sky high bidenflation was much worse, especially for those that worked hard to save.

Back on topic, that maxpeedingrods is the best bet for charging 240 as long as you don't mind potentially annoying your neighbors in the pits. Otherwise there are some lithium generator options for about double the price but only bring the Stark battery back up about 50% before the lithium gens need to be recharged themselves.