diy solar

diy solar

Recent content by MullerEnergy-Australia

  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

    It's Australian dollars and includes shipping. I'm definitely not saying it's cheap, but it's not as expensive as it may appear to international customers.
  3. MullerEnergy-Australia

    Active balancer, make it smart!?

    Good comments! The cell voltage measurements work fine and balancing does not cause any read errors on it. In my mind (and feel free to disagree) this isn't really an issue, regardless of whether the balancing is stopped for voltage measurements or not. While it's listed as a 5A balancer, this...
  4. MullerEnergy-Australia

    Active balancer, make it smart!?

    Sorry, I just saw this tag. Yes, it's possible, but only if you use an optocoupler. This ensures that you don't impact the BMS with the active balancer. Unfortunately, as I understand it, it's different with each BMS type, so I can't give a general answer. And when it comes to our type of BMS...
  5. 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...
  6. MullerEnergy-Australia

    BMS with PWM?

    Thanks very much for your input. We've measured the current at around 500A which is definitely high but it's not quite dividing-by-zero high. So in my mind, it's more of a question of how many and what type of MOSFETs (but please feel free to correct me). I did experiment with an inductor, but...
  7. MullerEnergy-Australia

    BMS with PWM?

    Unfortunately, I'm a little bit time-poor and while I'm a mechatronics engineer, it's somewhat outside of my comfort zone. Should you want to have a chat about some potential paid design work, please drop me an email on ruben@mullerenergy.com.au The reason why this is working a little bit...
  8. 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...
  9. MullerEnergy-Australia

    Beware @Michael B Caro

    I wish I had customers like you guys! I just had a customer going off at me because he hasn't received a charger he ordered last week (I have to admit that was mainly my fault, though the payment showed up as declined but it had actually come through). If you don't take action, there's no way...
  10. MullerEnergy-Australia

    Would you recommend grid tied solar to your friends?

    You been get it from about half that again. I've definitely seen A$2,199 for 6.6kW (DC, 5kW AC), which equates to US$0.24/W(DC). But you know what they say about paying peanuts and getting monkeys.
  11. MullerEnergy-Australia

    Would you recommend grid tied solar to your friends?

    Absolutely! In Australia, you can get fully installed prices (after a rebate that you don't have to worry about as the consumer) for well under US$0.50/W. Payback periods tend to be four years or less. I tell anyone that will listen to get solar!
  12. MullerEnergy-Australia

    Minor damage on new cells

    They are full of it. Was that Winnie? She's a serial liar. Ray comes to the same conclusion as me on Jidian. Definitely avoid!
  13. MullerEnergy-Australia

    Shenzhen Jidian Technology Co., Ltd. 272Ah 3.2v cell supplier

    I would strongly recommend NOT buying from them. Why? My own experiences are quite similar to Ray's:
  14. MullerEnergy-Australia

    Anyone bought from Shenzhen Jidan?

    I would strongly recommend NOT buying from them. Why? My own experiences are quite similar to Ray's:
  15. 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.
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