At the moment there is very little available to electrify an RV. The few heavy vehicle application currently available to the driving public are marketed for short travel distances applications (school buses, local deliveries,,,) and then requires several hours if not over night to recharge.
As mentioned poor aerodynamics of an RV is a very big down check for a potential application. The very small potential market, as compared to daily drivers, isn't helping either. Give it another decade or two. More likely to see a class B followed by a class C then maybe an A after the heavy truck market and acquitted recharging stations are firmly established.