Recent content by musashi1707

  1. M

    Top balancing 280ah REPT cells is one cell bad?

    I see you're asking him but personally I discharged using the tester with the fan/heatsink on it, at.. 17 amps if i remember correctly? So that would be under .1C on the 280, i think (new to all this). My test on the potentially bad cell came out to over 280 amp hours. I think I stopped the...
  2. M

    Are my panels broken? My charge controller? Low wattage..

    I am realizing that solar panels are a more flexible affair than I had previously thought. If I can get 90% efficiency out of the panels then I would be satisfied, but at 45% I figure I have work to do. After I make the modification to the temperature settings that Substrate mentioned above...
  3. M

    Are my panels broken? My charge controller? Low wattage..

    Good information, I am still digesting much of it. Your idea about connecting two lead acids in series is brilliant and I think something I can do. So the method would be to take two 12v lead acid batteries to a lower SOC, then, series connect them to achieve approximately 24-26 volts. Then I...
  4. M

    Are my panels broken? My charge controller? Low wattage..

    Update: After having read your provided thread, I will be changing gears in my diagnostic method due to the complexity of panel diagnostics. I was of the mind to try to rule out the panels as a failure point first so that I could then diagnose the charge controller and wiring. Instead, now I...
  5. M

    Are my panels broken? My charge controller? Low wattage..

    In order: Yes I did say I'm reading about 31 volts open current (if i understand open current correctly), perhaps as much as 33. The Voc rating is 37.8 V. Can you tell me, I take it voc means when there is no load on the panels, just the wires voltage being tested straight out of the panels...
  6. M

    Are my panels broken? My charge controller? Low wattage..

    For a point blank question, perhaps someone who knows can answer.. If a panel is rated for 30.8 volts, and a multimeter shows 31 volts on the panel and.. A panel is rated for a current of 8.5 amps, and a multimeter shows a short circuit amps of 7.5 (sun at slight angle, a little dirt on the...
  7. M

    Are my panels broken? My charge controller? Low wattage..

    This is very helpful, and thank you. I think you are absolutely correct. I have not yet connected the temperature sensor. I am wondering if this and the setting you mention are part of it. I have an update, which is that I significantly shortened the 14awg CCA wire from the solar panel, and...
  8. M

    Are my panels broken? My charge controller? Low wattage..

    Because I discharged the battery at about 40 amps for about 4+ hours, it has no constant charging source at this time (solar is not connected yet, doing testing when I am present at the location). I don't have a pic handy, no. I may be able to get one uploaded in the next couple of days...
  9. M

    Are my panels broken? My charge controller? Low wattage..

    That's the charging voltage, sorry, and it's a guesstimate of the voltage because that's the only number I didn't make note of. My battery is definitely at low SOC, and adding a large load to the battery makes no difference whatsoever. Believe me when I say that the voltage/amperages that we're...
  10. M

    Are my panels broken? My charge controller? Low wattage..

    Hi, I have two 260 watt panels, paralleled to a 40 amps epever tracerBN(mppt), connected to a diy 280ah lifepo4 battery. The battery is at a low SOC, it's a sunny California day at around noon. I'm getting 17 amps max :-\ I check the voltage at the panels, it reads approx 31 volts. (Vmpp =...
  11. M

    Exliporc 280Ah REPT batteries received 6-24-2021

    My time was right at 60 days and I'm near the port. My tracking as well had no change until I received the items. To be clear I ordered from Shenzen Starmax not Exi..
  12. M

    Bait and Switch AliExpress

    But alas I won't stay up too late on this topic, I'll only recommend a short read. "The benevolent nature of capitalism" I think it's a buck on Amazon. Time to counter some of that Marxist indoctrination you absorbed during college fellas, really. The doorbell is ringing and it ain't pretty ;-)
  13. M

    Bait and Switch AliExpress

    How do I know? because capitalism existed before corporations, and is independent of them. Technically it's independent of government too, innit?
  14. M

    Bait and Switch AliExpress

    Capitalism is not corporations controlling government.
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