Recent content by HKZBob

  1. HKZBob

    Europe 230V 50Hz Solar System, need advise what is needed.

    Hello, I am located in Europe that why 230V 50Hz. Question what is the most common panel system voltage? From the panels shall I use a victron MPPT 100/20 for charging my battery bank. Is this the right way to go. And from the bank running an inverter to 230V. Or do I need a BMS in between...
  2. HKZBob

    Does the housing of Lifepo4 battery has a potential

    Is a resistance measurements from Cell1 plus to Cell2/3/4 plus terminal a way to identify the isolation quality that I have? Should be infinity high resistance?
  3. HKZBob

    Does the housing of Lifepo4 battery has a potential

    Thanks I have checked the battery isolation and it was mint. Then I have added two layers of 3M automotive double sided foam tape and stick the cells together with some light 2mm space in between. As you know that the case center is slightly bow. The outside ist wrapped us with blue PVC package...
  4. HKZBob

    Does the housing of Lifepo4 battery has a potential

    If you pack the cells in series as the photo is showing and you have not used isolation paper 1mm, would you dissasembly the RV Battery Pack and add the paper? Man I thought I was done with that project. I am very upset of my Lishen Lifepo4 battery developer. What make them think to put positive...
  5. HKZBob

    Does the housing of Lifepo4 battery has a potential

    Is this current on housing a leak current driven by the electrolyte filling in the milliampere value or can that be high risk if one housing touches another. Maybe Will can do test to check out if this is a high risk potential. Thanks PS I hope the moderator can pass this concern to him...
  6. HKZBob

    Does the housing of Lifepo4 battery has a potential

    Hello FOLKS, Short question, does the housing of a Lifepo4 battery cell has a potential. The means und the blue plastic is the AL case. Is that isolated or does it has a potential. Who knows about this? Greeting Bob
  7. HKZBob

    QUCC BMS 250A. Who knows this BMS

    Yes I bought it but the balancer function is very weak so I have added an active balancer.
  8. HKZBob

    Help Need a discharge protector cut off 50V

    Need a discharge protector cut off 50V-60V programable to operate a 12V contacter. I want to protect my batterie against Low Voltage discharge. I am not using a BMS. Using an IDST 8S charger for balanceing. My pack is 72V and I am using a 12V 250A contacter to switch the load. Now I want to...
  9. HKZBob

    How would you build a 250Amp précharge circuit

    This is a éducation project to use it in front of an inverter
  10. HKZBob

    How would you build a 250Amp précharge circuit

    Yes I took a low cost delay timer to retard the main contacter. Maenwhile the small contacter paraelle is précharge the circuit over an resistance. I use what I have in my toolbox. Greetings.
  11. HKZBob

    WTB 20s 72V 18650 BMS for contacter usage

    Hello Folks, Girls and Men's looking for a BMS for a 20s Setup. 72V out of 18650. Current max continues is 2c of 2900mA I have 400 Lions 3.7V available. I have already the contacter gas filled and Mega fuses. So I thought to go entry dollar level. Seperate Port. 20s in series is 84V but the...
  12. HKZBob

    Ali coulomb meter set up

    Hi All users of the AILI Meter. Is that true what the manual says. Attention that operation can not be restored. What does that mean. I am not getting it. Does it means what I set my full capacity it can be never adjusted or changed Thanks for the support Bob
  13. HKZBob

    Electric Go Kart with Solar Roof 2Pannels

    Hahaha 😀 You are so funny, I have no more space above.
  14. HKZBob

    Electric Go Kart with Solar Roof 2Pannels

    That I don't know yet. I don't have the batterie on hand How about a 12V System and using step up transformer to bump it up to the desired voltage. That is an alternative to big batterie packs. I can run several in paraelle to increase the current. The transformed 72V is supplieing the BLDC...
  15. HKZBob

    Electric Go Kart with Solar Roof 2Pannels

    I will secure each pack with strong diodes. So in case of disconnect it will only 0.5V remain on the batterie pack. I use rectifier diodes out of alternator. They take easy 50A.
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