DETERIORATION ESTIMATION DEVICE, METHOD, SOLAR SYSTEM, AND VEHICLE

A deterioration estimation device that is provided in an in-vehicle component (such as an ECU) mounted in a vehicle includes a processor, and the processor is configured to acquire information about a temperature variation of the in-vehicle component based on electric power generated by a solar panel mounted in the vehicle, and estimate deterioration of the in-vehicle component based on the acquired information about the temperature variation of the in-vehicle component.