Methods and systems are provided for adjusting operation of multiple accessories of a vehicle using a single control user interface in communication with a single modular accessory controller of the vehicle. In one example, a system may include a modular accessory controller for a vehicle electrically coupled to a battery and two or more accessories of the vehicle and a control interface in communication with the modular accessory controller and including a plurality of buttons for providing user input for operating each of the two or more accessories of the vehicle.