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Gerrie

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Everything posted by Gerrie

  1. I'm interested if the thermal expansion properties of P2000 rails with aluminium panels clamped on could have any serious expansion consequences one should be wary of. Especially long runs of panels seen on warehouse IBR roofing. Is expansion joins required and what's available on the market?
  2. Thanks, You had me worried there for a moment. I have done installs where the AC DB sits on top of the DC DB. and that would be a total disaster
  3. Yes, that makes sense, my AC and DC cables that entered the inverter room was AC left and DC right and I did not want to cross on the outside as it would be an eye-sore and then rather crossed inside the trunking at the inverter.
  4. In my opinion I would think P2000 is the most cost-effective solution, but I have found the thin 1mm thickness material of the P2000 easily bends when tightening the panel clamps a bit too much compared to aluminium rails, that you can really put some force onto the bolts without bending anything. The aluminium comes at a price though but it's my preferred option.
  5. Could you please provide reasoning for your left preference? I would like to clarify this if there is such a regulation.
  6. I sent a request for an upgrade on 27th and upgraded was done on my 5KW in the early morning hours of 28/01/2024. This is the first upgrade since I installed it in 2021. No issues with upgrade, just received an E-Mail notifying me that the upgrade has been done. Version: M.3.3.8.5/S 0.5.1.3/CE.4.3.6
  7. I was also advised by Sunsynk back in 2022 when I done a 8KW Sunsynk with 20x450W panels not to go more than 8 in series as this voltage was too close to maximum MPPT range. I than ended up wiring 4xstrings with 5xseries panels, this gave me a voltage of 220V per MPPT. I would recon if suds7162 could split the 10 x panels into 2x strings of 5xpanels and still keep them facing North it would take him out of the risky zone of blowing the inverter, but this would mean pulling extra set of solar cables to combiner box and extending the combiner box to accommodate the second string.
  8. All closed up and commissioned, generated some nice watts today, I must say it was nice to install a Sunsynk inverter and batteries as a complete pack. Everything seems to just work, couple of minor settings to tweak to customers liking. The customer will monitor the winter PV on the West string for shading, the problem is if I move the panels to the East side, there is also a house with a high-pitched roof next door that is going to make shade on the East string, so I think it's a no-win situation. I might have to elevate the 2 x problem panels slightly higher on brackets and keep them on the West side.
  9. Yes, I am also concerned about that one panel, still hoping a easier option pop's up. But I fear at the end of the day I'll have to move it
  10. Some progress was made, panels are mounted and earthed. Finishing touches, labeling and COC still to be done. Please feel free to advise or critique anything that looks like it can be an issue.
  11. That's so true, most of the work had to be done after hours. Had to install a temporary DB. (white right-hand side) to keep all the loads happy while building the puzzle. The big problem was the grey DB where the mains 95mmx4 incomer from council had to be switched off in order to remove that grey DB and install the new White DB on that same spot. Once the council mains is switched off the clock starts ticking and things had to happen fast to keep people happy . When council is switched back on and there is no big bangs, you know you going to sleep ok tonight.
  12. DB's had to be rewired and split into essential and non-essential sections. This were done to allow for a smaller inverter system 24Kw 3ph. that will feed essentials loads only. The photos are of main DB board; work still in progress. Plant is running and temporary power had to be supplied while changing Main DB that,s why wires are hanging everywhere. Will post as project progress and inverter goes up.
  13. As built pictures of roof. There will be 5 x panels facing East, 7 x panels facing West, Limited roof space. Main DB about 20m away from inverter. will post as installation progresses. Panels facing West has a possible shading problem, and panel might have to be moved to the East string.
  14. I'll be installing the 3x8KW for a office block, but it will only be for all the essential loads as I have already split all the DB's in Essential and non essential sections. Essentials = All office plugs, lights and security lights, Server room, camera's, electric fences, gate motors and fridges. (Must have battery backup) Non Essentials = Geysers, Factory machines and factory plugs and AC's. (All Non Essentials will still have generator back-up though)
  15. I have seen these Sunny boy's in action in a couple of hospitals, they are very impressive. But yes they are in another league than Sunsynk.
  16. I already have 8KW units in stock, I'm not sure if it will than be beneficial to go for the 24KW unit.
  17. I would install 3 x 8kw inverters just for redundancy purposes. I have done single phase Sunsynks and like the symplicity, This will be my first 3phase Sunsynk setup. I have been contemplating for a while now whether 1x3ph unit or 3xsingle ph units. I think I'm also toward the 3xunits but can still be convinced otherwise if I can find good reason.
  18. I need to install a three phase system of 24KW. Would 3X8KW inverters do the same job as 1x24KW unit. Mounting space is not a problem and the 8KW units is already available, Is their any cons installing three units instead of one?
  19. I agree the earth's should all be bonded to have the same potential, but every circuit should have its own earth conductor.
  20. I am also still learning new techniques and tricks everyday although I have done 100's of COC's in my life. I have seen most installers use a single 4core cable with seperate earth to and from the inverter. I have decided against it in my own installations and install two separate cables because otherwise you have two separate supplies in one cable, inverter power and eskom power in one cable which does not seem right with a shared earth conductor. Installing two seperate cables also eliminates the earth problem, because each supply ghan has its own earth. What's the thought on this? Also Bonding relay, Where is the best place to install this. I normally install a separate little 4way DB but think it creates too much clutter and want to install the bonding relay in the AC DB, what's the thought on this?
  21. This is also new to me, not sure if someone might have the actual SANS Regulation to confirm this. The problem with this is I have seen a new twin type solar cable with positive and negative pvc joined together in one cable. I haven't used it myself but saw it at a solar supplier and thought it's not a bad idea, will make pulling wires easier. So this twin solar cable would be a problem and not allowed to be used if this is a regulation is fact.
  22. I am having a look at the SunSynk 1C rating, but my concern is that, does the 1C discharging rating mean anything if the charging current is only 0.5C. If I am drawing 1C in good daylight and I'm only putting back 0.5C my battery is going to run flat in daylight which does not make sense. Am I missing something here?
  23. @Janosh I will use 50A Anderson plug I agree it looks like a good option and it's not likely to swap polarity during plug ins. I have used the dinse welding plugs before but was not 100% satisfied with them due to the loose fit.
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