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  1. Beat

    Axpert radio interferences

    Success ! The radio interference is gone. I improved the inductance and added some capacitors. In order to run several turns trough the ferrite core I went to the motor and transformer winding shop to get some 6mm² winding wire. But they don’t have such. We finally agreed on 2mm² wire that I would use in 3 wire bundles. I bought 10m of it (R40). I also went to the electronic shop to buy 4 0.33µF 310V capacitors (R40). I first thought to have one core for each polarity. But then I realized that the 30A PV current could saturate the core and reduce the inductance. So I decided t
    4 points
  2. Just installed a Sunsynk 8kw inverter DIY and want to share some info. We use about 1000kwh (units) per month in our house so about 33 per day with about half in the day and half after PV hours. This is about average for a family home I recon in SA. Already have 2 Solar geysers, gas plates and all lights LED. I wanted to be independent from the grid as much as possible which weighed heavier than economics although my return is still acceptable and higher after tax than any risk free investment. The whole house runs through the inverter including oven, the solar geyser AC element
    4 points
  3. Chloe

    Electricity-self generation

    Hi all, I would be the first to admit I do not pay much attention to what our President says but I recently came across one of his resent newsletters that tickled my fancy in particular this section: "In an effort to facilitate electricity self-generation and as part of the reform process, we have removed the licensing requirement for self-generation projects under 1 MW. So far 156 self-generation facilities under 1 MW have been registered, with a total installed capacity of 72 MW." http://www.thepresidency.gov.za/newsletters/desk-president%2C-monday%2C-28-september-2020
    3 points
  4. Have a look at this Three Phase to Single Phase technical publication by Carroll & Meynell Transformers Ltd
    2 points
  5. No, I'm just saying that IF the voltage drop is the problem, it must be quite a large drop. 50 A is certainly more than I'd consider pushing through 6 mm² cable.
    2 points
  6. Hi guys, Just wanted to present to you a new Windows' software tool that we prepared for monitoring of PIP/Axpert inverters and Pylontech batteries. It supports many compatible inverter models. It can work with parallel configurations as well. This was actually the main reason to write the software because a few months ago I upgraded my system from single to 3x inverters and the "pi" solution did not work correct anymore. The software can control switching between battery/grid mode based on Pylontech SOC, and also can control Pylontech max charge current based on the request coming f
    1 point
  7. D'oh! I'm having the senior moment, thanks. Yes, 20 A per pair should be fine. So 2.3 V drop, or around 3% loss. Pretty reasonable.
    1 point
  8. Ordinary lead acid batteries don't like heavy discharges; 5 kW would be over 100 A, so over 5C for a 100 Ah battery. This will not be good for long life. They would probably provide that power for a few minutes, at the expense of battery life, if the inverter allowed it to (e.g. if there was no AC-in). But likely the battery voltage would sag so much that the inverter-charger (especially without the KettleKomp™ feature of patched firmware) would immediately switch to grid. 200 Ah (of nominally 48 V) is the minimum recommended size for a 5 kVA (especially a 5 kW) inverter.
    1 point
  9. Coulomb

    Axpert Fault?

    It's quite possible that heat is a factor, and 12 panels would definitely generate more heat in the solar charge controller than 3 or 4. Also, yours may be 60-cell panels. Those do need to be wired 3S. But 60-cell panels are much less common these days.
    1 point
  10. No one rushed to answer this one (and me being suspicious) I posted this on another local forum and the Terrible Tripplett responed: Does this mean that even if you are a registered SSEG CoCT cannot buy your excess power due to the national contact they have with Eskom ?? Correct. Until the Constitution is changed, or it is gazetted, no-one but Eksom is allowed to sell power to anyone. If you are grid-tied, and do go the feedback route, you have to netmeter over 1 year, you owe them some, they owe you nothing. That is about to change ... how, we will have to see. My suggestion
    1 point
  11. see attached SSEG tariffs for COCT, got this from the city of Cape Town website, not sure if this is the latest tariff sheet for feed in Tariff.pdf
    1 point
  12. Thee Mister EX

    Growatt reviews

    Ask for their Support department 0120301166, based in Centurion
    1 point
  13. calypso

    Battery Maint.

    Put a ceiling in your garage will keep a lot of the heat out. You can then also put in some extractors controlled via home assistant to pull the hot air out if it gets too toasty.
    1 point
  14. Delta9

    Battery Maint.

    Not sure if I should be worried here or not
    1 point
  15. We have some new pictures. ;)) Will post today. J
    1 point
  16. awesome. Please keep sending pics
    1 point
  17. Seeing as the 'smart' home bug has bitten me in a bad way, I've been working on integrating all the various bits of electronics in the house. One of the obvious things to get integrated is the power monitoring side and in my case, a Goodwe 5048ES inverter. I'm using Home Assistant as my automation system and there is integration for this available, but only to the SEMS portal. This won't do, as the SEMS portal isn't great, it sits in the cloud and it only updates every 5 minutes or so. Ideally you want to integrate directly to the inverter and get much more frequent updates, but I couldn
    1 point
  18. R Cerva

    Pirate ICC??

    Hi. Multisubcontrol is an opion I'm looking at. Can't get hold of Manie and he does not answer my email as well. So problems wit ICC can't get solved. The above software was also mentioned on this forum. Enjoy and it's free.
    1 point
  19. Not yet but just about to. Getting the actual switch (without IP66 enclosure) directly from the manufacturer in Austria, BENEDICT GmbH You could probably get the same switch from the South African distributor, DEEBAR (PTY) LTD
    1 point
  20. Coulomb

    SBU or SUB - Pylon Tech

    You don't need to use the comms cable to the battery's BMS, to use SBU output source priority or for any other reason. When the battery BMS is set up correctly, using the cable is generally best, but the defaults that come with Pylontechs and several others aren't suitable for Axperts. Over on AEVA forums, someone was saying that there are console port commands to change the defaults, but these aren't documented properly. Hopefully some day someone will sort it out, and using the cable will become the norm. Until then, it seems best not to use the cable, sadly.
    1 point
  21. Ok, All sorted. Someone had a small piece they were willing to part with me.
    1 point
  22. The proposed tariff for 2020/1, for residential properties who are net consumers and who sell "spare" power of less than 1 MW/h per month is 57.34 c. Plus you can't be on prepaid, you must be on a TOU tariff, your equipment must meet COJ standards (which implies an inspection) and you will need a bidirectional meter to be installed at your expense. If you're on pre-paid then switching to TOU means about R600 of service fees each month. COJ have been trying to force through a flat rate component for pre-paid connections. Two years ago it was removed because, the then Mayor said, somebody ha
    1 point
  23. Oh we do still need a good grid. I have spent what, for me, is not small change. I don't have regrets, it is saving me money (not as much as I'd hoped, though breaking even is still possible depending on future tariff increases), and load shedding doesn't bother me personally, but to put myself in a position where I am completely independent of the grid would cost at least as much again, and then what about the robots, the telecomms networks, the businesses and all the other users of the grid? So, yes, whilst I have improved my own position, an improved grid is a necessity for my suburb, th
    1 point
  24. Richard, you're right, and you're wrong... Some of us saw this trainwreck coming a long time ago and started working on our own solutions. Becoming power (or water) independent is a long and gradual process to which you must devote decades. We also may or may not have had a long history of trying to sway official policy and direction, to little effect. If you wait for policy to shift you should get used to cooking over an open fire and going to bed when the sun goes down.
    1 point
  25. Not a lot of help but i've measured my MP II 5000 & that was throwing out 58db whilst loaded up with 6000W using a phone sound meter app(sound meter)
    1 point
  26. No, 6mm GP cable is rated at 45A for 220V. Delivery 45A at 24V is a whole different ball game
    1 point
  27. I think there is a line that one should not cross. AIUI the batteries take a knock if run down to less than (about) 10% SOC.
    1 point
  28. Jatho

    CBI Astute Smart Controller

    The Sonoff with external really is a good option and not too much of a hack to put together, did it for my geysers about a month ago and was very worthwhile has definitely made a difference with my consumption, all in I think it cost me about R475 per geyser.
    1 point
  29. Hagu13, I think you are set up nicely and as you said when there is loadshedding, you can plan for that with the needed SOC Unfortunately for us here in rural Limpopo, infrastructure maintenance is a huge problem so it's almost always a gamble with how deep you discharge your batteries as one storm, one gust of wind, one fart in the wrong direction can mean anything from 1 to 24 hours without grid, and this happens a lot. So I run my batteries from 2am (can probably start at midnight rather), then wait for PV to start up after 6am, charge batteries during the day, which is usually do
    1 point
  30. Looks like eventually a step in the right direction no licenses hopefully also means no bribes need to be paid. There is mention of a “roadmap for our energy sector for the next decade” Looks like we won’t be packing our inverters away soon
    1 point
  31. Hi guys. Hope you all still well. I've just changed the setting to appliance from ups and now it work with generator. Thanks.
    1 point
  32. @Dani you won't go wrong with a Sunsynk!
    1 point
  33. Also have the 5kw and been running for about 2 months with just 1 north facing string fine. Adding a west facing string this weekend. They don’t need to be balanced
    1 point
  34. Thank you very much. That's what I have being trying to achieve since 2013. This really makes me happy. Sincerely Jason
    1 point
  35. I have the Sunsynk 5kW. It has 2 separate MPPTs, and you can have different orientations on them. I have 1.7 kWp (5 panels) on each MPPT, one array facing due NE and one NW. It has been working fine for me for the past 5 months.
    1 point
  36. I guess that’s why places like this are so important where people offer advice based on own experience without actually having any vested interest in what you buy.
    1 point
  37. Anybody using the 5kw Sunsynk? I'm looking to upgrade from the axpert. Does the Sunsynk have 2 mppts? And must the mppts be balanced I want one string facing east and the main string facing north. Anyone feel free to chime in.
    1 point
  38. There is a ton of information available on various platforms on the internet with regards to anything that one needs to do. Whenever I need to do anything at home, I will always try to research what needs to be done and how to do it. Being hands-on, I often try to do things by myself and if I can’t, I will get a “professional” in to do the task. If I seem to know more than the “professional” he needs to leave. For people that are not hands-on, it still helps to have an idea what needs to be done so that you know you are getting value for the money that you spend and that the j
    1 point
  39. Thank you so much I have changed the settings and the system is working no more errors, switching over to Solar automatically. We are so happy to see it working automatically. Thank you to everyone that assisted me. I have gained alot of knowledge on how this works. We plan on expanding by adding more solar panels hopefully by next month.
    1 point
  40. Mine works with growatt + date, i.e. growatt20201012
    1 point
  41. Kenton on sea has always had a water shortage 40 years ago the houses had cement tanks with hand pumps Today its plastic tanks and electric pumps I have 4 x 10000l and a pump that I run off solar As the town water used to have a bad taste the toilets were fed from the town and all the rest from the tanks So I only feed the toilets with town water and filter the water for drinking and cooking, unfiltered for bathing and washing. Can switch all feeds to municipal or tanks
    1 point
  42. Have a look at this DC changeover switch for transferring solar panels from a water pumping inverter to a high voltage solar charge controller. The wiring diagram is attached. Cellcronic DC-Changeover-Switch.pdf
    1 point
  43. There's no real need for udp traffic sniffing anymore, I believe we have managed to understand most of the protocol. The python library is still being tweaked here and there, but it is close to being stable. Although java (which Openhab is written in) is my "native" language, to be honest, I don't have much intention (or time to be more precise) to port it there at the moment. I was selecting between Home Assistant and OpenHab, decided for the HA and I'm happy so far.
    1 point
  44. Had some time today to add the battery charge/discharge info. Also moved things around a bit to make sense for me See updated Grafana JSON and new Solar Sketch with added battery charge discharge code. Power Monitor-1600266455741.json rev1_02_amps_volts_temp__hum_batdisscharge_charge.ino
    1 point
  45. Received the attached Pylontech battery performance curves from Pylon support if anyone is interested...Seems like these batteries can be run hard (high DoDs) and still last for many years 48V Pylontech Battery Performance 0320.pdf
    1 point
  46. Power Me

    Youda's off-grid LAB

    Thanks for this info. What battery state do the parameters with the "R" appended at the end refer to, or when to do they become applicable? For example; High Voltage = 53.9V but high VoltageR = 52.5V I have just had a thought, that perhaps parameters with "R" appended are for reference or are perhaps recommended safe values? (ie non "R" = marketing supplied and "R" appended = engineering proposed limits )
    1 point
  47. Hi Beat these figures are not correct at all, please refer to the SANS regulation for correct figures.
    1 point
  48. Hi Justin I have a Susnynk 5kw and I am very happy with it. Support is definitely on the up as it becomes more entrenched in RSA. To simplify your life I would go with the 1 x Sunynk 8kw. It is a very versatile inverter, much more so than the Axperts and Grow watts. (Generator support, micro/grid tied, wind turbine inverter input, detailed time of use settings, export power control and more). That R8k premium will be well spent when you measure your ROI over 10 years and the options you have available to expand your system. my 10 cents! Regards
    1 point
  49. Tim

    My DIY Home Automation

    @Jakesza - sorry that looks like a glorified remote panel - where the auotmations? (obvisuly I am more an open system guy) - just kidding though if it works thats cool I ve been away from forum for a bit so missed some of the action - some nice dashboards. I ve expanded mine quite a bit in Homeassistant since I posted last. Related to solar I now have a automation which is quite specific to PE Grid tie setup which you might find interesting. If you grid tied you linked to Eskom time of use time periods so you really want to be careful to get your system to only draw from grid in off-pea
    1 point
  50. Exactly. I think that most of the people at Pylontech don't even know how their products really operate. Which might be the reason why the documentation they provide to partnering vendors is so poor. The best charger for Pylontech would be the one that would pull all the states from the BMS and dynamically adjust charging current based on the info from the individual cells, like voltages, currents, temperatures. (Such detail is not available over CAN, only via RS485). But the complicated algorithms are prone to error and hard to finetune in the field. So, at the end of the day, just
    1 point
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