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Neb

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Everything posted by Neb

  1. I will also change it if it turns out that the method I've used is wrong Sent from my iPhone using Tapatalk
  2. That's cool. I need a scientific explanation about why my circuit is not going to work because this disagreement was about my banks being out of balance because of the method of wiring them together I've wired my batts as the diagram shows. There are 4 pieces of cable all within 2mm tolerance in the length labeled R2 There are 2 pieces also within 2mm tolerance in the length labeled R1 I know I may seem argumentative but that's not what this is about, I know you guys have more experience than me, I also know that you can't go wrong with the method of equal length jumpers and bus bar. I was chatting to an electronics engineer (both my neighbors are electrical engineers) and he showed me mathematically that if all the batteries see the same resistance then it's as well balanced as the equal jumper method (maybe with even less cable) PS yes I'm happy with the 0 Vdrop[emoji6] Sent from my iPhone using Tapatalk
  3. Sent from my iPhone using Tapatalk
  4. The total V drop across all my cable is 30mv @ 50A Sent from my iPhone using Tapatalk
  5. Why do we assume that the length of the positive lead needs to be the same as the negative when these cables are outside the circuit? Sent from my iPhone using Tapatalk
  6. Those different lengths have no effect, all the batteries see that cable length Sent from my iPhone using Tapatalk
  7. Those different lengths have no effect, all the batteries see that cable length Sent from my iPhone using Tapatalk
  8. Sorry, that was a mistake. Sent from my iPhone using Tapatalk
  9. Thanks superdiy. I agree with you on this. R1 and R2 in my diagram are just values to indicate the different lengths of cable. I measured my cables with lugs to be within 1-2mm difference but tried to get them exact. Sent from my iPhone using Tapatalk
  10. Not a problem, I'm here to learn When you talk about equal length cable referring to the method in the diagrams above, did you use lab equipment to measure the resistance? I understand what you are saying about small differences in resistance but surely it also applies to the above circuit as much as it applies to my circuit? I still see my circuit as balanced because each string sees the "same (without lab equipment) resistance", the initial advice was to change the way I've wired the batteries together and use bus bar and equal length cable. I.e. More cable, more resistance. If we are going to start talking about measuring the ohms in our "equal length cable" with lab sensitive equipment then surely this applies to everyone with "equal length" cable between strings and not just me ? Just asking ? Sent from my iPhone using Tapatalk
  11. Shot Don. Sent from my iPhone using Tapatalk
  12. Thanks Mark. Sent from my iPhone using Tapatalk
  13. Yeah, will try do that. But so far it makes sense or not? You can replace R1 and R2 with whatever value you want, the result will still be equal resistance for each string? Unless of course I could be wrong. Sent from my iPhone using Tapatalk would a battery balancer deal with the slight variation in equal length cable (I'm sure there's always a slight variation when crimping lugs onto equal length cable?)
  14. Here's a diagram to show the resistance at each battery string, shown as a circuit with values for cable resistance as R1 and R2, I'm only using 2 different length cables. The total resistance for each string is R5 I agree that I need balancers and fuses but I'm struggling to understand why I would need busbar and equal length cable when the resistance in my circuit is all the same for each string? Sent from my iPhone using Tapatalk
  15. Hi Zkrige In Flow manager, set the following. Smart Grid. Allow feed in to grid? No Allow AC to charge batteries? No In battery manager set the following. DOD with Grid? 50% DOD without grid? 50% Discharge only at night? No Hope this helps, that's of course only if you haven't tried this already? Cheers Ben Sent from my iPhone using Tapatalk
  16. Sent from my iPhone using Tapatalk
  17. All relevant cables are the same length, fuses are on the wall next to Imeon, I'm just waiting for the battery balancers. No busbar used here Sent from my iPhone using Tapatalk
  18. Sent from my iPhone using Tapatalk
  19. Hey guys. So I finally got some battery power to match, it's going well, been off-grid for a week now. We have 16 x 200Ah Gel Vrla Agm, 4 strings. Sent from my iPhone using Tapatalk
  20. This was at 17:00 with 2 more hours of sun. Sent from my iPhone using Tapatalk
  21. Sent from my iPhone using Tapatalk
  22. The difference this makes is huge. Sent from my iPhone using Tapatalk
  23. Rearranged my 2 strings to illuminate partial shadowing Sent from my iPhone using Tapatalk
  24. Sent from my iPhone using Tapatalk
  25. Hi Chris. The other thing to consider, the electricity department hates these systems. If your PV modules are visible you can expect a visit from them. If your system is going to be a stand-alone off-grid setup then you should have minimal hassle. My setup still has an old analogue meter that's located inside my property, the Authotities are now forcing me to change to a prepaid meter. I'm being harassed and forced to do things that benefit them and not me. They are treating me like a criminal. Funny thing is, if you read the papers it looks like they are encouraging solar and energy efficient systems, don't be fooled, they only encourage it if it belongs to them. I'm now looking at adding a few more panels, getting a massive lithium bank and going off grid completely. If you or anybody ever have hassles like this you need to let an energy manager like Ikapa Power Management handle the situation, they know all the laws and have the ability to audit your account and rectify any over billing etc, don't allow anyone to bully you. Sent from my iPhone using Tapatalk
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