Search results

  1. wattmatters

    SOC vs HV/LV delta and balancing….

    LiFePO4 can tolerate 3.8 V but it's not a recommended charge voltage - they are fully charged at 3.65 V. I charge my home LiFePO4 to an average of ~3.53 V.
  2. wattmatters

    SOC vs HV/LV delta and balancing….

    No. NMC is up to 4.3 V typically. My 64 pack voltage at 100% SOC is 440 V, which for 104 cells is an average of 4.23 V. Pack voltage last time I charged to 100% SOC:
  3. wattmatters

    MG4 51kWh LFP Battery Health

    The point of DC charging is speed. Cost and efficiency are subsidiary. If time was not the primary concern then you would AC charge every time, in which case cost trumps efficiency. Since DC charging is fast, then any sub-system will only be operating for a short time. But we have to also ask...
  4. wattmatters

    MG4 51kWh LFP Battery Health

    From the supply - the energy has to come from somewhere (first law of thermodynamics) and there is only one supply source - the charge port. If balancing was using a lot of energy it would show up in the charging energy consumption. The car tells you when it is balancing - it shows it on screen...
  5. wattmatters

    MG4 51kWh LFP Battery Health

    Balancing uses bugger all energy relative to a full pack recharge. Couple of handfuls of watt-hours.
  6. wattmatters

    OBD Data

    See here: https://www.mgevs.com/threads/api-integration.8381/page-6#post-279681
  7. wattmatters

    Solar battery and V2L

    If it's a bog standard 16S LFP battery, then it's not difficult - just need to connect the battery's terminals to a compatible battery charger designed for use with regular AC power input. Ensure the connection has a suitably rated fuse/DC breaker to protect the circuit components/wiring. I've...
  8. wattmatters

    SOC vs HV/LV delta and balancing….

    You can't discharge lower than 20% SOC with V2L.
  9. wattmatters

    Keeping track of my MG4 (efficiency)

    Collecting the data is not hard and compiling it isn't either. It helps to inform others curious to understand the nature of one owner's experience of charging an EV as well as dispel the usual 🐂:poop: bingo which inevitably populates social media.
  10. wattmatters

    SOC vs HV/LV delta and balancing….

    Depends on model location. In Australia MG4 does not use heat pump for heating so will draw more power.
  11. wattmatters

    SOC vs HV/LV delta and balancing….

    Run the aircon?
  12. wattmatters

    Keeping track of my MG4 (efficiency)

    Latest update.
  13. wattmatters

    MG4 in Australia

    2024 charge stats.
  14. wattmatters

    SOC vs HV/LV delta and balancing….

    Max - Min >= 0
  15. wattmatters

    V2G to be approved in Australia 2025

    V2G won't be using the car's inverter. It will need to be an approved inverter designed and approved for grid connection. Early models will be expensive but frankly it shouldn't cost a lot more than a regular hybrid grid-tied inverter which uses 400 V battery architecture and can talk with the...
  16. wattmatters

    Charging curve for MG4 SE SR

    Matches my own experience of fast charging past 55%, drops off rapidly.
  17. wattmatters

    SOC vs HV/LV delta and balancing….

    Balance charging at end of a charge session draws around 50-100 W:
  18. wattmatters

    MG4 in Australia

    We are, plus in the middle of the day our power is free so if you have the car at home you can charge for all but no cost. Today I have added 14 17 kWh of solar and 8 kWh of free grid energy to the car. +1
  19. wattmatters

    MG4 in Australia

    One big difference is the attitude towards cycling. Australia prioritises the convenience of drivers well above the safety of cyclists and pedestrians.
  20. wattmatters

    OBD Data

    Have you done a deep discharge and full AC recharge recently?
Back
Top Bottom