Recent content by 100 Proof

  1. 100 Proof

    Is it okay to exceed max V on an MPPT by 1.2v?

    You could also run 4 strings of 2 each if you want to use all the panels. ON EDIT: Nope. It looks like that would blow through the Amp rating. 2 strings of three is indeed the best setup for the AC300 with the panels you have specified.
  2. 100 Proof

    EVE-280 cells should these be clamped tight or spaced for expansion?

    Well then you will need to take the diameter of your threads, the material of the fasteners, the pitch of your threads, the number of fasteners you are using, and any lubricant properties involved and do some heavy math to figure it all out to get to 300kgf. It will likely be in the several...
  3. 100 Proof

    Ebike

    Did you get one on the air yet?
  4. 100 Proof

    Ebike

    I just finished a conversion. As followers of this forum will not be shocked to hear, I built my own 4P10S 36V battery out of 18650 cells. This is the conversion kit I bought. It was really straight forward. It took me about 3 hours to do mine, then once I was all learned up, 2 hours to convert...
  5. 100 Proof

    EVE-280 cells should these be clamped tight or spaced for expansion?

    Here are my busbars. Connection surfaces were meticulously prepped and the terminal connections torqued to 75 inch-pounds. Results- Minimal heating at 200 Amps continuous and plenty of compliance for expansion & contraction. What is your opinion of the "health" of this setup?
  6. 100 Proof

    EVE-280 cells should these be clamped tight or spaced for expansion?

    Mine are in a spring compression fixture and that's about the amount of expansion I see. Actually slightly less, but in that ballpark.
  7. 100 Proof

    Bus Bar Temperatures

    You might want to read this thread. https://diysolarforum.com/threads/psa-make-sure-to-properly-prepare-your-connections-to-aluminium-terminal-posts-in-order-to-ensure-low-contact-resistance.16019/
  8. 100 Proof

    Need some troubleshooting help [SOLVED!]

    As a follow-up, the problem has been solved! Upon further investigation, we found two of his three Battle Born batteries were exhibiting some odd results. After call to Battle Born, they wanted the batteries back, and determined that they had bad BMS's. They sent my friend two new batteries...
  9. 100 Proof

    Why is mppt better than pwm?

    That is a great article written in 2000! You should check out some of their newer ones too.
  10. 100 Proof

    Why is mppt better than pwm?

    From: https://www.leonics.com/support/article2_14j/articles2_14j_en.php "MPPT is DC to DC converter which operates by taking DC input from PV module, changing it to AC and converting it back to a different DC voltage and current to exactly match the PV module to the battery." The hardware is...
  11. 100 Proof

    Why is mppt better than pwm?

    From Victron's literature, "The MPPT charge controller is a DC to DC transformer that can transform power from a higher voltage to power at a lower voltage." and "A PWM controller is not a DC to DC transformer. The PWM controller is a switch which connects the solar panel to the battery." You...
  12. 100 Proof

    Why is mppt better than pwm?

    Nope. You can't step up the incoming Amps with an algorithm. You need hardware changes to do that. That is why legit MPPT charge controllers are more expensive, and typically larger and/or heavier than PWM controllers.
  13. 100 Proof

    Why is mppt better than pwm?

    I disagree that, "...mppt is an algorithm to modify the pwm technique...". You can't step up the incoming Amps with an algorithm. You need hardware changes to do that. That is why legit MPPT charge controllers are more expensive, and typically larger and/or heavier than PWM controllers.
  14. 100 Proof

    Tail current charge table

    Thanks! Took a minute, but I'm happy to finally see my original question answered!
  15. 100 Proof

    Why is mppt better than pwm?

    Except that if that if the "...nominal 12v panel that actually puts out 20v unregulated..." is rated at 10A Imp, you will never get more than that out of it with a PWM controller. With a legit MPPT controller, you have a shot at about 15ish Amps. Think of it this way: PWM- Amps in = Amps out...
Top