Spare part system for maintaining availability of spare parts for an electric power supply system

A spare part system for maintaining availability of spare parts for an electric power supply system, wherein the spare part system comprises:

• a first set of spare parts having a first remaining lifespan time;
• a second set of spare parts having a second remaining lifespan time being shorter than the first remaining lifespan time;
• a monitoring system for monitoring the status of the first set of spare parts and the second set of spare parts;
• wherein the monitoring system comprises:
• a monitoring unit located together with the first set of spare parts and the second set of spare parts;
• wherein the monitoring unit comprises a sensor and a communication unit;
• a monitoring central provided in communication with the communication unit of the monitoring unit;
• wherein the monitoring unit is configured to send a message to the monitoring central if a condition is present,
• wherein the monitoring unit comprises a power supply, wherein the power supply is defined with a minimum expected operation time for which the power supply is capable of powering the monitoring unit and the minimum expected operation time for the power supply is 1-3 times the second remaining lifespan time.