Pellet silos are ideal storage containers for mobile heating. Mobile wood pellet silos are used, for example, for construction and temporary heating, for drying buildings or for heating marquees or halls. The pellets are fed into the furnace and burned as required. To ensure continuous heat generation, reliable monitoring of the level in the pellet silo is necessary. The silo level data is transmitted wirelessly to the central office to ensure timely replenishment of the fuel.