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  1. MullerEnergy-Australia

    Admin privileges for JBD for everyone (for Android users at least)!

    We know it's really annoying that JBD took away admin rights on the Android app by default, but there is a way around it. All you need to do is log in with an account that has admin privileges and you'll get additional menus with all the settings that you require. We had JBD create one for us...
  2. MullerEnergy-Australia

    New 250A Smart BMS with 5A Active Balancer

    I hope this is okay, given that there is no longer a commercial corner on here. But I just wanted to share our new 250A JBD Smart BMS that has a built-in optocoupler that outputs a signal to a supplied 5A Heltec active balancer, so it turns on and off when the on-board passive balancer does...
  3. MullerEnergy-Australia

    BMS with PWM?

    Before I go reinventing the wheel, I thought I'd use the hive brain to make sure I'm not missing something obvious! So we're developing a hybrid starter battery that uses super caps to start the car and LiFePO4 cells to ensure the caps are charged. However, we also have a second low-voltage...
  4. MullerEnergy-Australia

    Daly BMS MOSFET details?

    Does anyone know what MOSFETs are used in a 4s LiFePO4 250A Smart Daly BMS (or similar model)? I want to do a stupid experiment and want to confirm it has a decent chance of survival.
  5. MullerEnergy-Australia

    Is there any reason not to do this in a car: DC-AC-DC over DC-DC?

    I just wanted to confirm I'm not missing anything. Assuming you have a LiFePO4 battery and an AC charger, is there any reason not to hook up an inverter and connect the AC charger to it, rather than having a dedicated DC-DC charger? The only two things I can see are the following: Convenience...
  6. MullerEnergy-Australia

    What BMS with on/off switch?

    I'm in need of a 100A 4s LiFePO4 BMS where I can turn off discharging at times (I don't mind if this turns off charging too or not) by using an external on/off switch. Are there many options? The Overkill BMS seems to support this, but I haven't found a JBD BMS that does (even though overkill...
  7. MullerEnergy-Australia

    Australia: 202Ah Lishen cells A$190, 272Ah Lishen cells A$250

    Cells are sold with an Australian warranty and come with an Australian invoice. The cells are located in north-western Sydney and can either be picked up or shipped Australia wide. The 202Ah cells generally test in the 206Ah to 210Ah range and the 272Ah cells in the 280 to 286Ah range. Come...
  8. MullerEnergy-Australia

    16s parallel BMS needed (120A+)

    I need to put four 48V batteries in parallel, any suggestions what BMS I can use? I would strongly prefer if it didn't need ethernet to connect to each other. Thanks!
  9. MullerEnergy-Australia

    Active balancer or not?

    I'm getting the following made by a Chinese manufacturer and I'm very much in two minds if I should get them to put a 5A active balancer in or not, what are your thoughts? Cost is a touch over US$1000. 50x custom 12V 200Ah (202Ah Lishen cells) 4WD/Camper battery with a whole bunch of connectors...
  10. MullerEnergy-Australia

    What refund would you ask for?

    I ordered 32x 272Ah Lishen cells and after being told a number of times that they're grade A, I was not impressed when I received them. Now I'm looking to tell prospective customers that they have cosmetic defects, which will reduce my revenue. How much money should I claim for in the Alibaba...
  11. MullerEnergy-Australia

    Defective Daly BMS or user error?

    I've sold a client 16x 272Ah Lishen batteries and when he asked me what BMS to get, I recommended that he get a 150A Daly Smart BMS. So now he installed the Lishens, they have a voltage of around 53V, which is pretty good, however we can't get the BMS to work when the inverter is on. To turn on...
  12. MullerEnergy-Australia

    BMS with built-in relay?

    I just came across this BMS (I'm not affiliated) that seems to have a somewhat reasonable balancing current, as well as something that looks like a built-in relay. I don't have any experience with this type of BMS at all, but it looks like a pretty good solution to me. Has anyone used this one...
  13. MullerEnergy-Australia

    Negotiating with Chinese vendors

    While I'm still a bit of a novice in the world of Alibaba, I've now got 6 orders under my belt (over 100kWh total) so I've got a little bit of experience now. One thing that really surprises me is how little room for negotiation there generally seems to be. I try every time after I receive a...
  14. MullerEnergy-Australia

    Electrolyte leaking?

    I'm being offered these Victpower 400Ah batteries for a very good price. However these white spots worry me slightly. Do you think they're leaking electrolyte or something more benign? That label behind also looks much darker than the other one at the bottom of the photo.
  15. MullerEnergy-Australia

    Australia: 272Ah Lishen LiFePO4

    I've got 20x 272Ah (they test at 280Ah) Lishen for sale. Brand new. Cost is A$272 or a small discount for 4 or more. I've also got 200A 4s Daly Smart BMS with Bluetooth and USB. Pickup would be from Carlingford (North West Sydney) or Woy Woy (Central coast). Any questions, just ask away!
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