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  1. L

    Charging rate question

    Sounds like if I want to push more than 50A total I'll need to put an external BMS on the circuit to be safe. Thanks for the help and advice!
  2. L

    Charging rate question

    In my system I have 2 banks of 4 Chins 12v 100ah batteries. The Chins manuals specify a 50A charging limit (set, I presume, by the BMS). Here's my question: Since I have two of these banks in parallel, can I push 100A to the battery system? Or do I need to stick to the 50A across the whole...
  3. L

    Battery bank early cut off

    Got it. Thank you so much!
  4. L

    Battery bank early cut off

    Got it. So, my last question (I think) is this: Let's say I got em' balanced in series properly on each bank (which I did), how then do I balance the banks against each other if I'm adding new banks to an existing setup? Do I have to take the whole thing down, do a top balance of all three banks...
  5. L

    Battery bank early cut off

    Ah, so I am definitely running up against the battery capacity. Okay, so that's one question solved--I will get those settings changed PDQ. On the balancing issue, how does one balance banks against one another when adding into an existing setup?
  6. L

    Battery bank early cut off

    Each individual battery has an internal BMS, and that's what I'm working with. Unfortunately, they don't have bluetooth functionality. Should I be getting an external BMS as well? If so, what would you recommend? To answer your question: The inverter low-voltage cut-off was set at 44v the first...
  7. L

    Battery bank early cut off

    Hello, all -- I've got my first system up and running, and it's been going like a champ for a few weeks. I've been gradually adding loads to find the limits of my overnight discharge ability, and I shouldn't have found it yet...but I have. I've got a 48v system with 3 strings of 3 340v panels...
  8. L

    Series and Parallel for batteries

    Follow-up: If it is something I ought to consider, is there a good brand I oughta look at? I'm seeing a lot of Daly BMSs around at a relatively high price point, and then a lot of others at lower price points. Is there a good resource for what BMSs provide good reliability and value-for-money?
  9. L

    Series and Parallel for batteries

    Ah, fusing! Hadn't thought of that. Where can I find info on how to size the fuses? Rather than these being 3.48v prizmatics, these are batteries (most of them CHINS 12v--can't remember the name of the 24v), and they do have bms's in the individual batteries, but I had not thought of BMSs for...
  10. L

    Series and Parallel for batteries

    Setting up my first off-grid system at 48v nominal, and trying to figure out how to wire the batteries in. I have 2 24v 100AH batteries, and 8 12v 100AH batteries. I know I need to wire the pair of 24v in series with each other to make one 48v batt. Similarly, I need to do 2 pairs of 4 12v in...
  11. L

    External Low temp cut-off

    LiFePO
  12. L

    External Low temp cut-off

    Putting together my 48v off-grid system, and have discovered that my all-in-one inverter/charge controller doesn't have low-temp cut-off, and two of my batteries also do not have low-temp cut-off. Obvs I will need to solve the low temp problem. First stage of the plan is some heat mats in the...
  13. L

    Shopping for the missing parts for a 24 or 48v

    Makes sense. Okay, so, 48w. Second 5000w or bigger inverter to run in parallel or as separate circuits (I can make either configuration work). The next obvious question: I gotta connect all this stuff together. How to I size the wires, figure out what kind of fusing do I need, etc.? (this is...
  14. L

    Shopping for the missing parts for a 24 or 48v

    As batteries are the most expensive part, I'm planning to build out on the installment plan. This first round of equipment buy will include 2 more 100ah/24w batteries, to double the size. By this time next year I hope to do another 4 rounds of buys of that size, or build my own out of prizmatics...
  15. L

    Shopping for the missing parts for a 24 or 48v

    Okie dokie, here's what I've got: 9x340v solar panels (72in long) 10x365v solar panels (60in long) One all-in-one inverter charge controller which'll handle the 9 panel array 2x24v 100ah LiFePO batteries I need to fill holes in this and come up with a design to power a cabin in northern...
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