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  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.
  16. HKZBob

    Electric Go Kart with Solar Roof 2Pannels

    Thanks for the hints. I am getting free 48V scooter Lion batteries. So if I have 4 of them I would charge them on 48V level with a 12V/ 48V DC DC step up transformer. Each pack will get their own step up. When I go in drive mode would like to use two cells in serial connection. 96V. This is the...
  17. HKZBob

    Electric Go Kart with Solar Roof 2Pannels

    My controller can take 32Amps and I am trying to go as much as possible to the upper voltage Level The good this is that the alternator motor is very durable using automotive grade copper with quality coating. Is has lots of inductance much copper thick winding. So but how do I charge my...
  18. HKZBob

    Electric Go Kart with Solar Roof 2Pannels

    Here motor concept.
  19. HKZBob

    Electric Go Kart with Solar Roof 2Pannels

    Dear Forum, I want to convert a gasoline Race Kart to an Solar Green Kart. I have two panels a 100W. 20V on hand. One panel will be used as a rear spoiler and the 2nd one shading the driver. Here my question. I want to power the Kart with scooter battery packs. 48V. I like to run the...
  20. HKZBob

    Daly BMS settings for protection parameters

    Do you have the UART PC interface setting. Can I connect the BMS directly to the PC without the battery connected. Thanks for the support.
  21. HKZBob

    Daly BMS settings for protection parameters

    Hi my app is in German, but I am Confused about SOC setting. How do you set up this value??? Thanks for the support Bob
  22. HKZBob

    Daly Smart 40A BMS Bluetooth App

    Hi Forum I have bought the Daly Smart 40A BMS. I have downloaded the APK but the translation to German it terrible. I assume the US APK Version is much better. How can I change the APK language or do I need an different apk. The Version I am using is V 1.7 Then the.adjudtment of SOC is not...
  23. HKZBob

    Meter used in videos, Will?

    The shunt is with no use.
  24. HKZBob

    Capacity Meter

    This is for over current protection
  25. HKZBob

    Capacity Meter

    I have no idea where to put this data
  26. HKZBob

    Meter used in videos, Will?

    Do you meant this one. Yes same calibration questions. Regards
  27. HKZBob

    Capacity Meter

    Does somebody know this Coulomb Meter. How can I set it up to 200Ah. This is my current SOC. My cells are fully charged and this meter measures in both directions. Regards
  28. HKZBob

    Ali coulomb meter set up

    Does somebody know this Coulomb Meter. How can I set it up to 200Ah. This is my current SOC. My cells are fully charged and this meter measures in both directions. Regards
  29. HKZBob

    Bought the 100A Digital Multimeter Voltage Tolerance

    Hi I have bought this Current Voltage meter as well that Will uses as well. The voltage display is 0,3V off the battery voltage. Do you have made the same experience. It this unit displays internal voltage incl. internal voltage drop off powering the coil Used external supply. No difference...
  30. HKZBob

    Active Equalizer (Balancer) and BMS.

    Thank you 1N4148 Gracie
  31. HKZBob

    Active Equalizer (Balancer) and BMS.

    Hi does someone has this Heltec 4s Balancer active at home. My Diode has passed away. I cannot see the SMD designation. Is this a S4 or M4 diode. Would be great if someone can check. Thanks Bob
  32. HKZBob

    200A Smart BMS from LLT Power

    Dear all, my name is Bob and I am although testing on a relay/contactor approach. My contactor is inert gas filled and shall conduct 250A is normally open and it pulls 350mA to pull on hight state. What is the current consumption of the contactor in this post. Then I have a precharge circuit...
  33. HKZBob

    Grade A cells, first charge a cell drifts 0,08V. Would you accept this ???

    Yes it will follow, I did already. So is the cell a grade A cell
  34. HKZBob

    Grade A cells, first charge a cell drifts 0,08V. Would you accept this ???

    Dear Forum, I have purchased 4 Lifepo4 cells 200Ah Grade A from N.... Official Store. When I opend the box the voltage level was Cell1: 3,271V Cell2: 3,274V Cell3: 3,271V Cell4: 3,273V Then I paraelled them and charged the up to 3,65V and rested them. Current dropped to Zero I did Top...
  35. HKZBob

    How would you build a 250Amp précharge circuit

    Hello Forum, I am building a 250A précharge due to the fact I am corona bored. The is nothing else to do. Here my project. It is a test board, sorry but not perfect. Using hot glue to makes things stick. To power my précharge circuit I am using a battery pack. Here my parts. For the delay...
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