I’m an environmentalist from Serbia, Belgrade, big electric vehicle enthusiast, and I can offer you 3 locations along your route! First one in Belgrade (I put it on the map) , second one 35 km south from Belgrade in Ralja (my weekend house) and third location 160 km south from Belgrade in Ćuprija – all those places along your route 🙂 I have a garage in all my houses and a place for you to stay + wifi. Naturally you are very welcome.
Have a great trip! 🙂