Some assumptions have to be made, but it should be pretty likely to work fine.
Car alternators can output at least 50 amps generally (700watts). Small (5000btu) Window air conditioners uses about 450w, even if the conversion is horrible, it'd still be at least 80% efficient, so 560 watts would be available for the window air conditioner to run from.
Why would anyone wish for Tesla to fail? Unfathomable