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  1. M

    First Alibaba lifepo4 purchase - Do NOT buy from **EVE Energy Co., Ltd.**

    Brief update for those interested, EVE (Alecia on Alibaba) said that the cells were repackaged by the forwarder before being given to the courier company for transport to my home address. I'm not sure I believe that as what would be the point of that and I don't think a few hours on the back of...
  2. M

    BMS + Balancer Lead Placement on Busbar

    Hi, thanks for both of your responses - that's very helpful. I like the idea of eliminating 1 set of cables that need to connect to the busbars by routing them via a molex connector - this is really good thinking. I've emailed Daly to see if they see any issues with that and to also check if I...
  3. M

    BMS + Balancer Lead Placement on Busbar

    There is no need to get defensive, I'm just trying to learn and get to the bottom of things. Having said that, if you can't explain your reasoning and instead end up appealing to spending a lot of money on expensive courses as if that was a valid argument then perhaps I should wait for someone...
  4. M

    BMS + Balancer Lead Placement on Busbar

    That's the thing though, 7AWG x2 is not enough to carry the 200A JK rate their BMS for, which is apparently a well known issue with many Chinese manufacturers where they cut costs on the cabling. Putting those undersized cables in silicone makes them less of a fire risk (doesn't completely...
  5. M

    BMS + Balancer Lead Placement on Busbar

    Thanks for the PDF - it looks very interesting. Could you clarify some of the other points for me though, I've unpacked them below like this: 1) Will's argument is that top balancing beats active balancing which I don't disagree with when you have grade A cells which I don't - mine are dented...
  6. M

    BMS + Balancer Lead Placement on Busbar

    Hi and thanks for your (very!) swift replay. Re Q2: Yes, the block format where you have the vertical bar on the left hand side will be slightly shorter than the remaining horizontal bars - I'm not sure if that's a problem for the BMS / Balancer or not. Re Q4: I initially wanted to use this...
  7. M

    BMS + Balancer Lead Placement on Busbar

    Hi There, I'm planning on making my own busbars for an S16 48V battery and a 12kW off-grid inverter. I can see that many battery manufacturers seem to have stopped placing BMS and Balancer leads directly on the cell terminals and instead, they seem to be now placing them in the middle of the...
  8. M

    First Alibaba lifepo4 purchase - Do NOT buy from **EVE Energy Co., Ltd.**

    It is precisely because they're a large company why I think they are intelligent and experienced enough to know how to package up a handful of cells. I don't understand your argument, since it was apparently worth their time and effort to agree to send me 16 good cells, sending me 16 bad ones...
  9. M

    First Alibaba lifepo4 purchase - Do NOT buy from **EVE Energy Co., Ltd.**

    That's right, they're the manufacturer - that's why I ordered my cells directly from them. I've already informed Eve of the issue but given how poor their customer service has been so far (e.g. they haven't been able to send me the tracking number for like 3 months...) and that some of the...
  10. M

    First Alibaba lifepo4 purchase - Do NOT buy from **EVE Energy Co., Ltd.**

    Hi All, Today I've received my first order from Alibaba and EVE Energy (https://evebatteryglobal.en.alibaba.com/?spm=a2700.12243863.0.0.2ce83e5fYxTya4) and it's been a complete disaster. I've ordered 16 of their new 6000 cycle 280Ah cells - unfortunately most of them have arrived damaged...
  11. M

    Growatt SPF 5000 ES & Battery Compatibility

    Yes, that's right, that's the plan however, I wonder whether the charging profile of the Inverter is not going to clash with the charging profile of the BMS...? How will the Inverter know how much voltage to supply to the BMS without there being some communication? Also, on a separate note I...
  12. M

    Hybrid Inverters & Grid Passthrough

    Thanks for this, that's very helpful. Yes, I guess you could say that. I suppose I'm still trying to get my head around various options etc.
  13. M

    Hybrid Inverters & Grid Passthrough

    Hi, thanks for clarifying that up for me. I suppose the 3rd option is to buy another unit or two and put them in parallel to get to a more reasonable 10-15kW... however, since each unit consumes around 60W this makes this approach rather unfeasible. A few other questions if I may: 1) Are there...
  14. M

    Hybrid Inverters & Grid Passthrough

    Hi All, I'm based in the UK and would like to buy a Growatt hybrid inverter to run a 2-4kW solar array together with a 5-10kWh battery bank in the 'grid support' mode, i.e. solar / battery first then the grid. I'm specifically looking at the SPF 5000ES model (5kW). Right now my grid connection...
  15. M

    Growatt SPF 5000 ES Wiring for 0 Export / Need help

    Hi, Sorry for a completely newb question but could someone please help me find a wiring diagram for how to connect the Growatt SPF 5000 ES to Utility Grid and set it to zero export? Thanks, Mark
  16. M

    Growatt SPF 5000 ES & Battery Compatibility

    Hi, I'm planning on getting the Growatt SPF 5000ES for my new solar setup but apparently there are some compatibility issues with certain lifepo4 batteries? I want to use a 48V battery with the new 6000 cycle EVE LF280K cells (16S) for my setup - link below for reference. I couldn't find...
  17. M

    AC Inverter / Prioritize Solar -> Battery -> Grid

    Hi All, I'm working on my first solar system and wanted to ask you to help me pick an inverter that would be able to automatically prioritize which data source gets used to power my house like this: solar panels -> battery pack -> the grid. Please note that I am not interested in exporting any...
  18. M

    MPPT for Non-Standard *51.2V* CATL LiFePO4 Battery Pack

    Amazing, thanks guys appreciate your help and expertise and yes, 20 years is probably on the optimistic side but with the CATL cells I should be alright. On a separate note, I note that the finished product is 2-3x more expensive than the batteries alone so maybe for my next project I'll build...
  19. M

    MPPT for Non-Standard *51.2V* CATL LiFePO4 Battery Pack

    Thanks for a swift replay! That's right, it's most likely 16 cells and I suspect the reason they did it that way was to get the unit to a full 5KWh (15x3.2V=48V x 100A=4800KWh so that's not enough but would have given them the 'standard' 48V). Do you think it's worth getting one of those 48V...
  20. M

    MPPT for Non-Standard *51.2V* CATL LiFePO4 Battery Pack

    Hi, I'm interested in purchasing my first solar battery pack (together with a handful of used 500W panels) and since I can't quite afford Tesla's PowerWall, I decided to go with a Chinese PowerWall instead :cool: . 1) I'm ready to pull the trigger on this bad boy since it comes with CATL cells...
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