Charging a campervan battery from a public EV charge station?
The charger itself - the part that takes 120 V or 240 V AC and produces battery-voltage DC - could be whatever off-the-shelf automotive/RV charger that you want to use. Personally, I would just look for ordinary 120 V 15 A plug-ins (or the local equivalent if you are not in North America, such as 16 A @ 240 V in some places), and wait longer ...