Innovenergy_trunk/doc/controller_tests/Charge to min SOC -> Hold min SOC.md

# Charge to min SOC -> Hold min SOC

Initial State: Charge to min SOC
Target State: Hold min SOC

Test Procedure

1. The battery is discharged below 20% SOC
2. Min SOC is set to 20%
3. A production deficit is simulated by setting Grid setpoint to a negative value (-2000W)
4. Wait until the SOC stabilizes slightly above Min SOC

Expected Outcome

The system assumes the Charge to min SOC state and charges with high power (~2000W), until it reaches Min SOC.
Once it reaches Min SOC it does the following:

• it changes into the Hold min SOC state
• the SOC stabilizes between 20% and 20.5%
• the SOC does not fluctuate by more than 0.1% once it has stabilized
• charging power does not fluctuate by more than 250W once it has stabilized

Tested Outcome

The system reacted as expected and switched to Charge to min SOC and charged as fast as possible till reaching the Min SOC.
Once the Min SOC is reached, the battery switches to Hold min SOC, entering a stabilisation state for around 10 minutes where
the charging power remains positive and up to 270 W. After approximately 10 minutes, the battery reaches the final stabilised
state where the charging power fluctuates in range of +-75W. The SOC fluctuates between 20% and 21%, slighty favouring the later.