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EugeneS

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Everything posted by EugeneS

  1. What do you mean by "counting down units"? Is your balance being reduced with the amount that you are exporting? If so, then you need to set the inverter to "Zero Export" in order to not send units into the grid and you may need to set a trickle feed in order for the inverter to constantly pull a small amount of electricity from the grid (usually around 50w).
  2. Hi @Kha2, it seems as if your issue was resolved, but part of the topic thread has been lost - I assume the user that posted deleted it or his account. Can you recall how it was fixed and perhaps provide me with some assistance?
  3. Thanks all, the 9 panels were installed yesterday. All seems good so far. Was overcast when we connected them and reading was at 410v. I have peace of mind with the 9 panels and think I'm still generating more than what I need.
  4. @ASH_JHBThis is a perfect example of personal bias. It is no use you have enough panels to generate power for a small country, but nowhere to store it. Nor is it of any use to have storage space for enough power for a small country without having a way to generate power. And the third, my point above, it is no use you have enough power generated or stored to power a small country, but only 1 length of 3mm copper wire (and batteries have this limitation too in terms of the amount of power it can supply at any given time). I would argue that the first consideration should be what your peak requirement is and ensuring that the system (inverter and batteries) can handle that, then you can start deciding how much power you can generate and how much of it you want to / can store. Your average consumption seems to be around 2,5KW per hour, with peaks around 5,5KW and lows around 1KW. So if your panels could generate 3KW, then during idle times when you're consuming 1KW, the balance can be stored to battery. If you have 1x 5KW battery with a 1C rating, you can pull 5KW from the battery, however if you have 1x 5KW battery with 0.5C rating then you can only pull 2,5KW from battery. Thus why I said you will need 2x Hubbles or 4x Pylontech in order to pull the full 8KW through the inverter from battery. So now you can decide, do you want to generate more power from panels to fill the batteries faster (increasing the 3KW in above example) or do you want more batteries to store more power for use during the night. (assuming that you've taken care of peak requirements)
  5. I've read some of the responses here and don't necessarily agree with all them, BUT I also admit that I'm not an expert. What I think you are lacking in your considerations of the scenario above is that you have (using water as an example) calculated how much water you need in a day, but not the pressure at which the water needs to be supplied. So in your example you have advised that you need 35KW per day, but not what your average and peak consumption would be. Is there ever a time that you need the full 8KW for any period of time? You need to answer that question in order to determine the minimum number of each battery required. You can add more batteries to hold more electricity, but you also need to keep in mind that you may need more batteries to get more electricity at a higher "pressure". In oversimplification, you will need minimum 2x Hubble to get the full 8KW (as one can provide max 5,5kw due to 1C rating) or (probably) 4x Pylontech batteries (as I think they're rated 0.5C). I trust others here will point out if I'm wrong somewhere, but the crux of my comment is that you need to consider your peak load requirement too.
  6. Will you be installing the system yourself or do you need someone to install for you. If you need someone to install, it may be best to consider buying all components from the same person to avoid getting shifted around if problems occur? If installing yourself, I assume you've considered the electrical equipment and mounting structure too?
  7. Not sure why I can't edit my response above. Either I get a bigger protection box allowing 2 inputs and 2 outputs, or get a second box for the second string.
  8. Thank you very much for this very comprehensive reply. I think I'll either go with your suggestion of only linking 9 panels or getting a second protection box
  9. Wouldn't this still require a protection box with 2 inputs and 2 outputs?
  10. My calculations based on the information supplied above. Inverter Input Voltage: 370V (100V-500V) - thus max should be 500V MPPT range 125 - 425V Panel VOC 49.6v x 10 = 496V Panel VMP 41.64 x 10 = 417V So, whilst 10 panels are within max without accommodating weather and also in MPPT range, I suspect it would be best to either drop to 9 panels total or to spend the extra R3k and do two strings of 5 each.
  11. Thank you for all the valuable information. This is the spec sheet I could find: JAM72S30 525-550 MR (shopify.com) Azimuth seems to be around 20-25 degrees. What is the worst case scenario if the system goes into over voltage? I would assume there are sufficient safeguards to ensure shutdown or errors etc and that nothing should blow or burn out? Or do I spend an extra R3,000 for a larger protection box in order to essentially cater for one extra panel (from 9 panels to 10) - I realise I will string them 5 each then, but the expense is really for one more panel.
  12. Model Sunsynk-8K-SG01LP1 Location: Kempton Park, Gauteng Don't have exact pitch, but not steep. Don't know azimuth.
  13. Hi all, Need to get some advice. I'm installing 10x 540w JA Solar panels and trying to save some costs. The installers feels I should be fine installing them as 1 string on 1 MPPT. However, I'm getting apprehensive as the VOC is 49.6 per panel (496 total) and recommended max on my Sunsynk 8KW is 500. Any views or recommendations? Should I rather do 2 strings of 5 panels each? Thanks in advance, Eugene
  14. Do people on here provide recommendations for installers or is that frowned upon? I'm thinking that I should likely get an installer to assist me.
  15. Thank you for the great advice. (suicide plugs are such an apt name). I noticed you are using the Pylontech batteries too. I have read that some people now seem to favour the Hubble batteries. Your thoughts?
  16. Thank you. The reason why I phrased the questions in that manner, is that a salesman was telling me about a battery charger being required. As mentioned, I would like to get the DB split and proper installation done, but would also require wiring being updated and some lights changed. But would be great to have a short term solution in the meantime to run lights, a computer or two and a tv or two. I was thinking that instead of continuing to use the generator for this, I could get the inverter and battery now and then look at installation and a second battery in November. And if all goes well, get the roof painted and some solar panels installed in 2022. With the above in mind, would it be more cost effective to get a smaller 3kW?) non-hybrid inverter with the 3,5kW battery with the goal of adding a 5kW Hybrid inverter and more batteries at a later stage? Would I then be able to use the two inverters together for a total of 8kW capacity? OR am I just unnecessarily complicating things?
  17. I have some any questions and am seemingly confusing myself with the different components and options. Would really appreciate some guidance on the best way to approach eventually getting off grid. Theoretically, can I buy a 8kW Hybrid Inverter with a 3,5kW Pylontech battery, connect the two and connect that two the house through a plug point. Or would I need any other components? Disclaimer: I realise this is not legal or safe. It is really a question about the workings of the system and the various components. I eventually want to get to solar panels, but so many things need to happen beforehand (like painting the roof and rewiring the old section of the house).
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