Assessing Performance or State or Load Condition of a Battery Storage

A method of determining an assessment indicator for assessing at least one of a performance, a state, and a load condition of a battery storage, the method comprising:

• obtaining a series of measurements of at least one physical parameter of the battery storage, the measurements corresponding to successive points of time of a time segment, wherein the at least one physical parameter includes at least one of voltage and current;
• inputting the series of measurements to an encoder of an autoencoder;
• receiving a reconstructed series of measurements from a decoder of the autoencoder;
• calculating a value of a reconstruction error based on the series of measurements and the reconstructed series of measurements;
• and
• determining an assessment indicator for assessing at least one of a performance, a state, and a load condition of the battery storage based on the calculated value of the reconstruction error.