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  1. Snapperhead

    New OffGrid Victron - Possible Ground Loop ?

    Thanks heaps for your input Mike . . . This is a newly installed system (and supposedly compliant) for separate and dedicated circuits within my home. It only runs my house lighting, water pumps and fridge. These circuits are all separate from the main DB-1 and consist of hard wired outlets into...
  2. Snapperhead

    Inverter Ground/Neutral Bonding

    @TexanSun Thanks for clearing this up..... Could you please cast your eye over my recent post re: "grounding loop" and let me know what you think. I'd really appreciate your input :)
  3. Snapperhead

    New OffGrid Victron - Possible Ground Loop ?

    Testing has shown my Generator is in fact NOT Earth/Neutral tied as suspected… Still no advice re above sub board bonding and safe way to use shore power for charging ???
  4. Snapperhead

    Off-grid grounding with transfer switch

    I found this helpul for a similar setup >> https://diysolarforum.com/resources/grounding-made-simpler-part-1-ac-houshold-grounding.157/
  5. Snapperhead

    Inverter Ground/Neutral Bonding

    I found this to be a great source of info on this exact topic, and have a question regarding this open also.... https://diysolarforum.com/resources/grounding-made-simpler-part-1-ac-houshold-grounding.157/
  6. Snapperhead

    New OffGrid Victron - Possible Ground Loop ?

    System Specs: (see pic #1) Quattro II 230v 48v/5K/70 2.64kW PV 3S2P 2x BSL LiFePo4 48v Connected via CAN-Bus) Cerbo GX Victron MPPT 150/60 (connected via V.E Direct)
  7. Snapperhead

    New OffGrid Victron - Possible Ground Loop ?

    Hi AC Power guru’s….. I know this topic has been done to death, and I have been reading posts till my eyes are bleeding… But I can’t find a definitive answer to my specific question. Most posts relate to boating with shore power anomaly’s, RV Vans with their chassis dilemmas or complicated...
  8. Snapperhead

    Grid Tie Victron ESS with DIY LiFePO4 Battery in Australia - Regulatory Issues?

    Am I correct in assuming that Victron now had CEC approval in Australia for the MP II grid code A/477.2:2020 with new Appendix M approval ??? I assume this due to the details within the changelog of the MP Firmware 510 that states >>> **Enabled the appendix M. gridcodes of AS/NZS4777 for...
  9. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    More Console Settings :)
  10. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    @sunshine_eggo Hooraah . . . Hit 100% SoC for over an hour today, and it brought up some interesting questions I'm sure you can explain to help my learning curve ? I appreciate your input and guidance so far.. ? Changes made & Questions >> Over the last few sunny days I spent much time top...
  11. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    Still no 100% SoC.... :cry: However battery is now top balanced and doing what a nice LiFePo4 should do. After top balancing the pack for over 10 hours the DVCC & BMS Max Charge Voltage was returned down from 56.8v to 55.2v Cell Delta went from >150mv to 10mv (over 32x cells) so I'm guessing...
  12. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    That looks like an amazing diagnostic tool..... I'll set one up tonight at work if all goes well. Did you have any trouble setting the Y axis ranges ? This info should contrast some of the disparity's nicely and give an indication of where to have a closer look. On first blush.... What to you...
  13. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    Yes, I understand the cause of some of the variance, such as cable losses and anomaly’s of certain reporting thresholds etc…. But when my measured pack terminal voltage is more than 3 Volts higher than the BMS recorded pack voltage, I don’t understand…. Or why the preset max charge voltage...
  14. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    Thanks n2aws . . Good to know ?? I was wondering if the voltage imbalance between packs may be contributing to my weird range of voltage reference points … or confusing the Cerbo ? But if it’s not a factor…. I’ll keep looking ??
  15. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    Well said.... Yes this is so very true and often misinterpreted. However I'm pretty sure my setup doesn't have, and isn't supposed to have, any bulk/abs/float cycles at all due to it's ESS environment. So, I would normally sit the charge voltage at 55.2v and just cycle them down to a safe SoC...
  16. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    Yes, It's not that I want it to sit at unhealthy voltages all day. My end game is to cycle the battery's down to a safe SoC overnight and simply charge them and use them to assist high loads throughout the day only. But I'm simply testing the new setup at this point, and wanting to top balance...
  17. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    From your experience, is it best practice to have both batteries cabled separately back to a buss bar (via two pairs of 3x metre 4AWG cable lengths), which is then cabled separatley to both Inverter & MPPT ? (It could be wired with one 2 metre 2AWG) What happens if these two separate battery...
  18. Snapperhead

    BSLBATT battery questions and answers

    @BSL Batttery SOLAR NA - Try them on messenger. They appear to be somewhat more responsive there...... And of course Whatsapp.
  19. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    Some voltages this morning during absorption (if this is actually hapenning ?) BMS Reported Voltages>> Batt_1 = 54.22v (Master) Batt_2 = 53.63v VRM = 53.63v MultiMeter Batt Terminals>> (DC Voltage bouncing arround between 55v - 59v - Trusty Fluke has AVG reading ability ? ) Batt_1 = 56.8v...
  20. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    This mornings Data ? :coffee::coffee::coffee: :oops:
  21. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    Thanks for the info…. Do u know what type of BMS it is ? And where I can get some more detailed specs ? What could be causing the gradual decline in voltage ? Even when in ‘Keep battery charged’ mode ? Any thoughts ?
  22. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    Thanks mate. With the help of this amazing crew …. I’m sure I’ll solve this one as I did the Grid Code issue supplying the house loads. Thanks again to you and others ???
  23. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    Then .... the voltage peaks at my desired value (56.8v on this occasion) with all 32x cells eventually within 30mv of each other ? Then .... after about 15 minutes the pack voltage starts to drop for no reason I can figure out. And it slowly settles down to a much lesser voltage and keeps...
  24. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    Here are the cable pics …. Cable data sheet is available if it helps ??
  25. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    Thanks for sharing your brain cells Solar Guru dudes..... I appreciate it very much btw ??✊ Ok, so I've been testing all day with MUCH coffee after Night Shift. Here is my results thus far >> I've increased the BMS "Pack Full Charge Voltage" (as per parameter pic attached) to 56.3v and it is...
  26. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    Yes, it appears from all angles that that would start the process of top balancing and see what it does from there..... So what's the best way to do this ? I realize not everyone has Victron, so I'm restricted to the paramteres of the mighty blue. Do I just increase the "Max Charge Voltage"...
  27. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    Yes, I have 16x cells per pack. I'll play with the Master BMS value and see how that influences things. I've heard 3.55v to be a pretty good voltage for top balancing (temporarily of course for the sake of top balancing). Andy from Off Grid Garage has done a very good video on this and a lower...
  28. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    This is what I'm seeing here.... Would this be normal @sunshine_eggo ?
  29. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    Ok great, this could be a nice start point to experiment for a solution.... So just to be 100% on the same page, I'd be adjusting this "Max Charge Voltage" within the BMS parameters right ? And then making sure the DVCC "CVL" is de-activated or above this new BMS value ? I'm also assuming...
  30. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    Thanks EggDude.... Yes I've kept an eye on the cell voltages, and they all appear within 30mv of each other when balanced or even as little as 10mv or less when being discharged..... The most they ever appear apart is about 100mv during the rapid charging first thing in the morning. Do you think...
  31. Snapperhead

    The all allusive 100% SoC - Is it fiction ?

    Hi Solar experts..... I need some fresh perspective on why a battery refuses to show 100% SoC even under the most favourable conditions. First a little about the setup in question..... Two(2) parallel LiFePo4 48v 5.12kWh 100Ah BSL racks (via CAN-Bus) fed by Victron MPPT 450/100 TR (via...
  32. Snapperhead

    'Off-Grid' meets 'Grid' - Sort Of - SkyBox Installed ? ** victron ESS Dilemma**

    Thanks ?? I’ve got my eyes on a pair of the new Jakiper 230Ah rack mounted 48v LiFePo4 units…. They reviewed really well by ‘Andy’s off grid Garage’ here in Oz That should provide me with a few days of zero sunshine up here in the mountain fog ? I have mostly hijacked someone else’s post in...
  33. Snapperhead

    'Off-Grid' meets 'Grid' - Sort Of - SkyBox Installed ? ** victron ESS Dilemma**

    You’re correct…. I just nailed it with a change in grid code. It’s doing exactly what it is supposed to now with respect to it’s parameters within the ESS environment. Finally ! From here it’s just testing and tweaking to get all the variables playing nicely together to get me through the night...
  34. Snapperhead

    'Off-Grid' meets 'Grid' - Sort Of - SkyBox Installed ? ** victron ESS Dilemma**

    Thanks for your reply 3418, Yes, my AC-Coupled setup is just a pre-existing system in parallel on the AC-In of the Multiplus.... and just feeds the house loads, then exports all excess (5kW Max Export here in Australia). I notice this AC-Coupled PV Inverter does assist with the Critical Loads...

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