A method for determining a value representative of the remaining useful life, RUL, of a capacitor, the method comprising the following operations: repeating for several iterations 1 to k, k being an integer greater than 1: acquiring environment measurements that are representative of the environment of the capacitor at a current iteration; based on previous environment measurements acquired at previous iterations 1 to k−1 before the current iteration, and on the received environment measurements at iteration k, calculating at least one aging model; based on the at least one calculated aging model, determining the value representative of the RUL of the capacitor.