You could run a heating element at full power on 208V by adding a center tap connected to neutral. For something fancy like an EV charger, you would probably ne

You could run a heating element at full power on 208V by adding a center tap connected to neutral. For something fancy like an EV charger, you would probably need dual 120V AC/DC converters, which isn't worth the effort, given that constant-current loads run at 86% power (208/240), compared to resistive loads at 75% power (208/240 squared).