I am curious about the charger included. It says 2 hour charge time for a 4kWh battery.
You can safely (continuously) draw 12A from a standard 120V outlet (USA). That is 1.4kW.
So maybe a bit longer than 2 hours for a full charge, but close.
Would be cool if the charger had a 240V option, or could even connect to level 2 EVSE (electric car supply equipment) for public charging. The J1772 standard is pretty straight forward. Only minor hand shaking required to get power from those.