diy solar

diy solar

Recent content by Moonwalker

  1. M

    JK BMS to Multiplus Inverter gives SC protect error

    Have tried a 10ohm resistor across the BMS with a push button. However the BMS does not clear the error by itself. To clear the error have to push the button, enable Emergency and wait until the protection timeout while keeping the button pressed. Then I can disable emergency.
  2. M

    JK BMS max charging current

    I have limited the max charging current from shore power so total wont exceed the BMS limit. My BMS has CAN/484 bus so can connect it to Multiplus but probably wont do it as at 14.1V should not exceed any cell limits.
  3. M

    JK BMS to Multiplus Inverter gives SC protect error

    I have built a new battery with JK BMS (B2A8S20P) and installed on a boat. Everything works fine until the battery is disconnected. On reconnecting battery, the BMS gives a SC protect error. I traced the fault to the Multiplus Inverter - if disconnected the BMS works fine. Tried switching...
  4. M

    JK BMS max charging current

    I would like more info about the Max charging current on JK BMS. If it is exceeded does the BMS limit the current of cuts out charging?
  5. M

    2 BMS in Parallel

    Thanks for the detailed explanation and fuse ideas. Note about parallel cells - As you said 95% of market cells are not proper grade A. However with cells in parallel there is very little risk of stressing one cell unless they have a lot of capacity imbalance. Problems may occur if the total...
  6. M

    2 BMS in Parallel

    I am building a house battery for a boat consisting of 24 (280K) cells. It is a 12V system and onboard inverter is rated at 3kW so the max current is around 300A. I was looking at the JK smart BMS but the max current they have is 200A. Can I separate them in two batteries and connect them in...
  7. M

    Daly smart BMS current calibration

    My BMS (Bluetooth app) is showing a little discrepancy in the current reading. Charging at 9A it shows 9.3A on the app. Discharging at 7.6A shows -7.3A. Is there a way to calibrate it please?
  8. M

    Daly BMS off after long idle time

    Thanks it was the BMS entering sleep mode. Setting sleep waiting time to 15300s the BMS did not enter sleep mode and did not shut off after 2 weeks idle. So hopefully this is solved.
  9. M

    Daly BMS off after long idle time

    Cells are stable at around 3.3 V each. BMS shows - discharge MOS = ON - charge MOS = ON This only happens when battery is disconnected for a long time. Otherwise with frequent use the BMS works as it should.
  10. M

    Daly BMS off after long idle time

    With 'Idle' I mean fully disconnected. Bluetooth monitor shows it is fully charged but the output stays disconnected. Once I connect a charger for a few seconds the BMS starts working again.
  11. M

    Daly BMS off after long idle time

    I have Daly BMS with 4 cells for 12V battery. I am planning to install it as house battery on my boat however it is shutting off after around 2 weeks idle. It will need a little charging to turn On again. Is this normal for Daly BMS and is there a way to turn off this fault/feature?
  12. M

    New cells swelling

    That's my next question. So far I am testing the cells separately. After discharge there is still some swelling but less. So should I compress them on full charge or discharged? And should I try to compress-inn the swelling or leave some space where the cells can swell?
  13. M

    New cells swelling

    Ok thanks for the info. I will do some charge-discharge cycles and report back.
  14. M

    Our NEW GO-TO LiFePO4 vendor...09.20.21

    @Jenny Wu - Do you have warehouse in Europe?
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