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Gnome

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Everything posted by Gnome

  1. It keeps the batteries at float. What are you hoping to accomplish by disconnecting it?
  2. Then they are legally required to release the source code per GNU: https://github.com/emoncms/emoncms/blob/master/LICENSE.txt
  3. Definitely not. SANS absolute maximums below. And btw. the most common cable in SA made by Aberdare has even lower ratings than this. The recommendation is no more than 20a on 2.5mm, less if it is in a hot roof space. Both ambient and conductor maximum temperature rating causes these values to be derated.
  4. +1 got the same feeling. Plus the messages I think he sent me directly threatening me not to dare to look at his source code or steal his IP or something like that.
  5. No, only if they used the source code of a GNU related project themselves. Also I can almost guarantee you that both ICC and this new app SMH have used code from either looking at how Voltronics own software is written or the various Voltronic based open source projects. Hell they may even have straight up copied the code. I don't have proof of this but the problems people complain of in ICC are pretty trivial problems to solve which leads me to believe the software developers for those projects aren't the "best" around. ie. likely to have copied stuff and not bothered to test, fix, iterate
  6. Erm, cool and all but this isn't a SANS complaint installation. Any CoC you issue for this would be invalid because you can't just stick anything in a DB and call it a day. They need appropriate SANS ratings. If you install this for enough people and they start reporting you or take you to court, you can get in serious trouble. Device certification is much more strict than the actual CoC.
  7. They still haven't improved the no-load efficiency so I fully expect the internals will be unchanged. Won't upgrade until they finally improve their design to be more efficient at low loads.
  8. What is with all these 1 post wonders suddenly coming onto the forum praising this new "product", I have to say it looks like advertising by a business
  9. Just an update on this. My company deployed APC UPS (brand new) with extended run capability and extended battery pack to keep routers running during load shedding to a large group of our staff. Total cost of each unit based on my estimate is roughly R40k. The feedback on our local mailing list is, everyone hates the APC unit, the complaints were: 1. Very noisy fan 2. After a few months it no longer lasted more than 20 minutes. The decision was defended as by local IT as, we aren't experts and at the time options were limited. Use it, don't use it.
  10. I hope you aren't paying for these repairs. It is obvious the previous tenant messed up the DB. You aren't allowed to rent out a house that isn't complaint so the landlord has no choice but to fix it. Whether or not the landlord wishes to claim from the previous tenant is his choice. Also, I know you had an electrician over but I assume you have a double poll breaker for the main switch now? (not just the earth leakage) It is a legal requirement that single phase installations should be isolated with a double poll breaker.
  11. Haha no problem, maybe I came across a bit in your face. I don't own one but I also suspect it maybe obvious to you with all the context in your head right now but someone who hadn't seen it in a while may be like ???
  12. I guess what I'm trying to say is. Connected something like the Pylon battery to an Axpert King with it set to PYL. Then capture what communication is happening between the BMS and the Inverter. Then simply do the same thing as they are doing with your own battery parameters. Forget about help from Voltronic or a modified firmware. If you want it working, then you'll need to basically clone the Pylon hardware communication protocol as they do it. That way if Voltronic does something that updates their firmware, you are support because Pylon is supported.
  13. No idea what you are talking about... Pro-tip: Link to the subject at hand so others can become informed
  14. Can confirm, just checked with an engineer, they 100% don't share cable trays with AC power in buildings. Non power wires run in isolated conduits.
  15. For trunking I don't think there is a difference because the same risk exists. But I could have sworn they run cables from both power and other systems (ie Air Conditioning systems logic cables) in a cable tray. But I'll confirm. I can't see anything explicitly in the regs other than, keep your AC electrical wire away from your non-AC electrical stuff. I expect the answer is going to be no mixing in a cable tray or you need to put it in a conduit or something. But TBD.
  16. Let me just rant a bit here. Because a lot of the guys who CAN issues CoCs shouldn't. Or they issue it for things that are outside their wheel house. My partner works in the building industry as a professional engineer for the HVAC and wet services side. Granted electrical isn't the area she signs for, but the problem is wide. As an engineer you design a system and the installer that issues the CoC should follow the instructions to the T. Engineers are designers and installers are doers. Whenever the installer deviates you are screwing a system that was built using very specialized calculations and was approved by the local municipality. If it sounds elitist, it is only because you haven't been on the other side. The software and calculations involved are super expensive and have years of study behind them (ie. thermodynamics for liquid based services). The electrical industry is different here, there are not professional engineers that sign for electrical installs. Probably because electrical is so old. But this is, in my opinion, why every yahoo installs it their own way. A solar install shouldn't be designed by an electrician. The overall design should be done by a competent engineer. If they copy that design for multiple install sites, fair enough. But electricians are following guidelines, they lack a significant amount of theory you get when doing a degree. The problem with electricians doing the design is, they don't know what they don't know. They know the regs and nothing more. So if a safety device should be there but it isn't mentioned in the current version of the regs, well it isn't even going to get considered. CoC covers the entire installation of the house. Unless the CoC was only issued for a part of the install. A CoC is about covering the electrical install of a home. The same happens for a Geyser (also need a CoC there).
  17. EDIT: Sorry I see you didn't say it requires metal. You were responding with the only sections you think mention metal. Kept my response below for posterity, because I frankly don't see any evidence of "DC requires metal pipes" story Do you have an older version of the standards? Your numbers are not the same as SANS 10142-1:2017 Edition 2 Secondly: What does a DC install have to do with lightning protection? Bonding is about bonding your water pipes and gutters, what does that have to do with DC? Same for surge protection, it has nothing to do with DC. --- You should be looking at this section:
  18. SANS 10142-1:2017 Edition 2: Wiring of premises isn't a suggestion book. It lists the rules and requirements for a domestic install. There are no "hey do what you want but we recommend". Pretty much each section lays out a number of rules related to a specific topic. They even go further to say you shouldn't put AC from one power source in the same conduit as another AC power source (ie. you can't run you inverter AC wire in the same conduit as your Eskom AC). But the DC requirement is pretty obvious unless you don't know what you are doing. Almost everything in SANS 10142-1:2017 is about safety. And when you run AC and DC in the same conduit, if any cable were to get nicked and get in contact with the other, your entire DC installation is at mains voltage without any of the AC safety equipment. Nicked cables are the most common cause of electrical faults and happen in most homes, so it is an obvious rule. South African Bureau of standards. These SANS document regulate every industry. Plumbing, Electrical, Buildings, etc. Just about anything that is legal to use in this country will either state which SANS codes they comply with in the manual or on the product itself. You can't legally sell almost anything in SA without complying with one or more of the SANS standards. Where does it say that? I just logged into my access portal to make sure I have the latest edition and I can't find anything about that in the standard.
  19. I mean reducing variables here; when using a competitor's Lithium battery product, do you see the same problem? I would start by reverse engineering their protocol and then simply emulating that protocol. That way it should work as it does for them?
  20. For the King model, yes. The Axpert King was built by Voltronic, the company that makes them, to serve in situations where you want 0 transfer time. So in other words, there isn't any dip in power when you switch from "utility/solar/battery". They way they do this is by running the inverter permanently from the DC bus. Meaning they convert input power to high voltage DC, whether that input comes from AC, solar or battery. Then once that is high voltage DC it is converted to AC. This arrangement is called double conversion in the UPS world. For sensitive electronics this is the most desired configuration because no matter what your input power looks like, your output power is always from the inverter itself. Your input power can have any frequency, voltage or wave form and it doesn't change how the output looks. For example when you don't run in bypass you'll notice your voltage is ALWAYS a 230v AC sine wave @ 50hz or whatever you configured the output as. The problem is, in hardware they have the inverter permanently wired to the battery. It can't even start up without the battery. The reason it works this way is, if they didn't they would need to switch a massive DC load using a relay which would be incredible unreliable. If you want something that only switches on the inverter when you need it, the non King model is better suited. Bypass mode btw. just switches a relay that takes your input power cables and puts it out to output. But the inverter itself is still being powered by the battery. I think a lot of people bought the King model not realizing its target market is really sensitive electronics. The VMIII, etc. much more ideally suited to a house IMO
  21. Yeah, I'm using mine only as a UPS, not panels. If you are going UPS only, I think lead acid makes sense. Since I have no experience dealing with panels, I can't answer for you what is best suited there. But lead acid doesn't deal well with being discharged for long periods. So I think there lithium is definitely the better option when you are thinking of going off-grid or partially off-grid. The financial input for a system with and without panels are completely different. You can do a UPS backup that allows 2-4 load sheddings a day for relatively low cost compared to what you need to put in to go off-grid or even partially off-grid.
  22. If you guys are going for load shedding backup, lead acid batteries are totally fine since you are only doing 2 hours at a time. I've been running for roughly 3 years now on my current set of lead acids and they are still going well. It is roughly R10k to replace them which I budgeted to replace every 3-4 years. The fact that lithium batteries are more complicated to install with the Axpert, more expensive and also age, I don't think it makes sense. My 2 cents.
  23. Did you wire this into your house?
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