MPPT Integration Meeting Notes:

Open

MPPT Integration and HV/LV Circuitry

Custom MPPT:

• Hardware:

  • Power: current plan is to power off of the LV power (12V) if we find a better reason to power the MPPT off of the array then we can adjust the plan

    • The reason for this is that the Blackbody A are changed off of the 12V so it would be more elegant

  • HV:

    • Integrate custom MPPT into the HV system for pre-charge

  • Isolate LV from HV

  • Next gen:

    • Use 12 V fuse box for power and CAN

    • 12V → Isolated 12v → Hv system

• Firmware:

  • Implement pre-charge protection

Commercial MPPT:

• Hardware:

  • Powered off of CAN and 30V pre-charge

    • Minimum 6V

    • When testing it looked like it was drawing power from the array

  • HV:

    • Figure out if we can integrate both the commercial and custom MPPT into the HV system for pre-charge

  • Daybreak: Power off of 12V fuse box

    • Check to see if the CAN is isolated from the LV

    • If not:

      • We need an 12V isolator

• Firmware:

  • Understand given firmware and implement pre-charge protection

Questions for TPEE :

• Schematic?

• Is CAN isolated from LV?