diy solar

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  • Post in thread: Balance charging 14 BYD packs with ISDT Hobby Chargers

    Well I did get a stable 3.5 vpc after power was removed. However, as soon as my load got turned on, the cell voltage dove down to 3.3 - 3.4 in literally minutes. So I conclude that other than top balancing there is not much point to go up to 3.5+ vpc. Would you agree?
  • Post in thread: Cheap 4kwh LiFePO4 batteries from Battery Hookup

    Oh wow. You said: "We are really talking about scenarios during initial setup/testing. I would't look to a RC style charger for any type of permanent setup. " So what would be chargers to match the afore mentioned power supplies for a permanent setup charging 24 v BYD batteries with four or...
  • Post in thread: Cheap 4kwh LiFePO4 batteries from Battery Hookup

    Yeah, that is rapidly dawning on me. So what's the answer to bottom balance BYD cells within a 1-2 day period?
  • Post in thread: Balance charging 14 BYD packs with ISDT Hobby Chargers

    The ISDT T8 balance charger is the only one that I know of that can be used for automatic top balancing of LFP batteries. You set the HVC and it just grinds away, in my case for 28 hrs, charging up one cell at a time to the HVC level and keeps the cells there. In contrast, my prior charge...
  • Post in thread: Cheap 4kwh LiFePO4 batteries from Battery Hookup

    Thanks so much, DarkStar. That is way cool. Great videos also. I like the different charging method your T8 and Q8 charger uses. The ToolkitRC just stops charging once once the first cell reaches the HVC level. It makes way more sense for a charger to hold the cell that reaches 3.6 v first...
  • Post in thread: Cheap 4kwh LiFePO4 batteries from Battery Hookup

    Of course, you are correct. Even at only 3 KwH capacity these are a good deal. Maybe I can still get closer to 4 KwH. We'll see.
  • Post in thread: Cheap 4kwh LiFePO4 batteries from Battery Hookup

    KBWaldron: have you made any more progress on your plans of Nov. 20. Your plans make much more sense to me now after a month of learning. Your plan to tie each corresponding cell together is the same idea that David Poz is using in his recent video. But OMG all those wires make my head hurt...
  • Post in thread: Wiring size charts, applicable to AC and DC?

    As an electrical novice, wire sizing has been one of the things I have paid a lot of attention to in my internet research. I have not used scientific data sources for this research, but have relied on "apparently reputable" company sources. Can anyone explain these confusing results? Item 1...
  • Post in thread: Chargery BMS now with Low Temp Cutoff

    Thanks for all the excellent information on the Chargery BMS. I have watched the vids and read the manual from chargery. Non of this material mentions how a solar charge controller works with the Chargery BMS. How is such a solar charge controller connected to the Chargery BMS? What happens...
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