Abstract: Methods, systems, and technologies for preconditioning an interior/cabin of a vehicle using a control system and an HVAC system. The preconditioning can include heating or cooling the interior/cabin to a desired temperature or temperature range, and/or maintaining the interior/cabin at the desired temperature or temperature range once reached, e.g., prior to departure/operation of an associated vehicle. The preconditioning can be initiated and/or controlled based on an estimated or selected departure time, and/or can be performed in multiple phases that use different operation of the HVAC system to manage heat transfer and power use. The preconditioning can also be adjusted based on a rate of battery charging to facilitate a desired battery charge prior to departure.