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These are the actions needed to achieve a certain relay state:

OFF->ON:

1. set HV_POS_RELAY_EN

2. set HV_NEG_RELAY_EN

3. set HV_SOLAR_RELAY_EN

For ON->OFF or ON->Fault, we can just open all at once (set *_EN to low)

CAN Messages

BMS Status:

• 16-bit fault bitset corresponding to ENUM above

• 8-bit relay state (OFF/ON)

• 8-bit Fan status fault bitset for Fan1 + 2

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