Madrid’s paid parking zones are managed by the SER service and are divided into blue zones (maximum 4-hour parking) and green zones (designed for residents, but visitors can park for up to 2 hours).
There are also other paid parking options in Madrid such as deterrent zones near commuter train and metro stations, designed to reduce congestion in the city center. These are generally more affordable parking alternatives.
If you want to visit Madrid after picking up your camper van rental and don’t want the hassle of strict parking limits, try one of the car parks on the outskirts of the city, such as Plaza de Castilla, Avenida de Portugal, or near Méndez Álvaro, and use public transit to reach the center.