7.5.2 Test procedure The SOC loss a

7.5.2 Test procedure The SOC loss at storage behaviour shall be measured with a complete battery system. During the storage period, all battery system terminals shall be disconnected (e.g. voltage class B connections, voltage class A connection, cooling). The service disconnect device, if any, shall be disconnected. The SOC loss at storage of the battery system shall be measured after a 720 h (30 d) rest period at 45 °C ambient temperature with an initial SOC of 50 % or higher, if agreed between supplier and customer. The remaining SOC after the storage period shall be determined by a 1C discharge for high-power battery systems or a C/3 discharge for high-energy battery systems. The SOC loss at storage test shall be performed in a temperature controlled test chamber according to the test sequence in Table 17. Temperature: 45 °C. Standard cycle: To ensure that each test is done with the battery system in the same initial condition, an SC (see 6.2) shall be performed prior to the SOC loss at storage test.Discharge rate: Discharge the high-power battery system to 50 % SOC at 1 C rate or Discharge the high-energy battery system to 50 % SOC at C/3 rate. A higher SOC value can be agreed between supplier and customer.Rest period: 720 h (30 d).Auxiliary energy: During the storage period, all connections at the battery system are disconnected. Service disconnect: The service disconnect device