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  1. 5 points
    What I want to know what aspect of his Victron system made the client so cross as to crash into his solar shed .
  2. 5 points
    Coulomb

    Battery lugs and terminals

    Not solder; solder seeps into the copper and makes an abrupt stiff to flexible interface that raises stress. Plus, soldering 35 mm^2 cable is nearly impossible. Use a compound to exclude the air and water from the crimp joint. The idea is that it squeezes out of the junction and only fills the gaps. It is mildly conductive, but of course nothing like the conductivity of copper. So don't use excessive amounts. Proper crimped lugs are essential for anything over about five amps.
  3. 4 points
    well, even the chaldeans, nevermind satan himself, had a role to play in redemptive history - so die afrikaner moet nie 'n groot kop kry nie - look how dismally the 'chosen' nation failed their prophets. but lets give the stranded guy a name, if his role model was robinson crusoe would that make him robert coetzee?
  4. 3 points
    watkykjy1

    ICC version 2.3.0 out now!

    Hi Guys, After a very long journey and what seemed to be impossible initially, we are very proud to announce that ICC version 2.3.0 is finally out. Among others it includes support for both Blue Nova batteries as well as the Pylontech lithium range, iwhich means that anyone with those batteries don't need to resolve to the use of a BMV-702 any more, as those have their own built-in battery monitors, and they can now report their SOC, voltage, etc directly to ICC. This also makes switching between PV and grid A LOT more accurate and more importantly, the batteries don't get overcharged or over discharged, ensuring their maximum performance and life cycle. The new version also allows the user to get his system up and running in less than a minute, as we now provide a simple signup form which auto-creates the user's account in the cloud, including 3 beautiful and easy to understand dashboards. The new account is then also automatically configured on the user's Pi. All they have to do is select their inverter and they are done ;). IOS AND ANDROID APP SUPPORT!! Upon registering we send a link to every user for the relevant Android or IOS apps, so they can connect their system to their cellphones easily. We can also support all 9 Axpert inverters in parallel, as well as have the ability to continue monitoring should some of the inverters be turned off at night (some people do that to conserve night time energy and turn them back on the next morning for maximum PV generation). We also re-wrote portions of emoncms with custom widgets to make the cloud-based dashboards more beautiful and intuitive. Support for the Infinisolar E 5.5kw has also been added, as well as the load switching ability for the Infinisolar V series (PV/Grid/Batteries or PV/Batteries/Grid) Grab this new image at www.centurionsolar.co.za right away! We even offer free trial keys for those that have an inverter and just want to check it out as well, so what are you waiting for?! Here are some screenshots of the new cloud dashboards:
  5. 3 points
    Johandup

    The end is nigh

    I can see the ANC letting the powerstations run empty of coal and die. And then there will not be electricity to run the mines to restart production. And the chaos will start. We’ve been very close to this scenario once before when the power stations nearly tripped. Many years later and some broken units have still not been repaired - but I am sure the insurance money is long gone. It is good to read Clem Sunter’s books on different scenarios. Fact is that the current lot in guvament only knows the way of fraud and violence - organised, instigated, real, inspired or otherwise. They could never have foreseen that international money powers could force their hand. Thas is Moody and company for you. But the previous regime also met their match when the international community turned against them. But at least the ANC inherited and took over a stable economy. Big companies are now divesting to get away from the sh*thole our country has become. The period up to the next elections will be very volatile and downright dangerous as the politicians manouver around the trough. And they don’t worry about casualties - the VBS drama illustrates this very well. Unless many people suddenly develop consciences and steer away from their pickpocket ways this country is in trouble. And to think I’ve thought that the rand will never weaken to R20 to a $. All the reputable economists are of the opinion that you must convert investments to dollars.
  6. 3 points
    Energy

    Average Wind Database South Africa

    Here we go sir: http://stel-apps.csir.co.za/wasa-img/WIND_ATLAS_GUIDE.pdf If you get a bit stuck with the Google Earth Overlay give me a shout. I struggled a bit to get it working. It is amazing though. You can zoom in any where. It is however only for WC I believe. Gents if I may promote my business after 5 years of keeping the forum up. hahah. I am a Pilot and I love any thing Propellers. I love wind Turbines. I am at www.pegasus-systems.co.za and some videos at : https://www.facebook.com/pegasussystems/ Wind Turbines are my passion. I see them as battery savers in the night (too Avoid deep discharges) and also very useful at the coast and valley mountain areas. I never recommend them if the ROI is to high when taking into account the saving on Battery and so. I am terribly sorry for promoting my own business. Its against my ethos. But I love them very much. My margins are slim :>> . Dont go Zohaan! Go Pegasus! These machines are built for 20 years , with normal maintenance. Thanks guys for letting me post this. Sincerely Jason
  7. 3 points
    ibiza

    Multi strings

    That's what the slaves are for, aren't they?
  8. 3 points
    Mike

    MORE ESKOM WOES... is that possible?

    TTT, us oldies can still do it......as long as i have a comfortable mat and an indent in the ground for my stomach plus clean glasses i should still see thru a scope fair well. lol
  9. 3 points
    Mike

    Axpert 5KVA No Batteries?

    The Goodwe, Imeon and Voltronic and i am sure others will run without battery as they are true hybrid - not the Axpert / RTC / Mecer type - they need to see dc voltage incoming on the battery circuit
  10. 3 points
    Energy

    Solar Panel - Roof Mounting

    Hi All. I have sent him a email, hoping he could join us with his much needed know how. Sincerely Jason
  11. 2 points
    and our ships come in with all the containers...
  12. 2 points
    Johandup

    The end is nigh

    For some people who have been following Eskom discussions. https://www.dailymaverick.co.za/article/2018-04-16-inside-the-coal-supply-emergency-at-eskom/#.WtQrO5mxWhA The real Eskom story has finally been spotlighted - but please don’t expect miracles. No mine can be kickstarted into production and neglect takes a looonng time to fix. I should know as I worked on them for 40 odd years. This is a very good motivation to get the alternative electrical supply in order guys. Time to become a solar seller. Lots of money to be made from everybody.
  13. 2 points
    Indeed, that's not too surprising. I'd really really love to repeat the experiment with some Voltronics though... you know... for kicks :-P
  14. 2 points
    Equalisation charging boils off electrolyte and because you cannot top-up the electrolyte in gel and other sealed batteries, you generally want to avoid doing equalisation charges. You only do them if you absolutely have to (there is a gross imbalance), and it is much better to avoid the imbalance in the first place with a good battery balancer. So I won't say you cannot equalise a gel battery, but it should be done sparingly if ever, preferably never if you can avoid it.
  15. 2 points
    I use the infinisolar 3KW plus which is capable of 6KW throughput in hybrid mode when the grid is available. My entire house including the geyser runs through the inverter as I wanted the excess solar power to heat the geyser at mid day as the geyser runs on a timer. I did replace the 3KW element with a 2KW element to keep the load within the inverters capabilities. I had a relay installed that completes the circuit for the dishwasher, washing machine and geyser so that should the power trip when these are in use, the load on the inverter is reduced to my base load of around 500W. This prevents the inverter from tripping on overload if the power goes out.
  16. 2 points
    The Rolls Royce, Axpert
  17. 2 points
    been there...... Waited till sunset to test but there was still enough juice to give me an impressive arc. The staff on the farm were very impressed - "Yoh - uyachokka"
  18. 2 points
    ibiza

    Multi strings

    we simply couldn't stop chatting! As you can see @Chris Hobson is still slipping. It was very interesting subject we were discussing.
  19. 2 points
    Chris Hobson

    Multi strings

    I will forever be know as the pyrotechnic adviser. Bellville's fire department are still looking for me to take a statement.
  20. 2 points
    The Terrible Triplett

    Multi strings

    Reminds me of a certain 2 x 200w panels setup that had an issue ito a "installer" (read poepol) taking them from parallel to series. In his defence, it was blerrie high on the very edge of a 2nd story roof, 11-12pm on a very hot summers Saturday, that said "installer" got the stupid bee in his stupid bonnet because a certain Mr @Chris Hobson pointed out a small correction ito the max watts between 12v vs 24v ito series vs parallel. Said poepol was a small poepol even before started off being a even bigger poepol. Issue was picked up quick, yes, but the damage was done pretty fast he will attest, as it takes wee bit of time getting up and down said roof. The diodes on one panel melted into oblivion, as did part of the casing they where in. Panel was so hot it nearly gave blisters. Panel itself was unscathed, not sure about the lifespan or for how long it will still work. Nor if it would have started burning if it was not picked up that quick. The diodes are now top of the range, before they where just ... there.
  21. 2 points
    Chris Hobson

    weekend humour

    Nah .... its just Hobson's choice!
  22. 2 points
    OomD

    Axpert 73.00b funnies...

    @weber, thanks for your feedback. Yes, I thought the funny I found was related to the Axpert's own firmware, not your mod. I did notice that, as mentioned, going out of the setting and back in again allows further change. Yes, sorry I meant Aut and not Def (Default). So, that would be the optimal value to use then. You guys are to commended for your continued effort. I know it takes a lot of time away from more important things, just the fact that you're still doing it is awesome. If you ever start a donation page, which I think you should, I would be early in line to contribute. The Aussie view feature, in particular, is brilliant!
  23. 2 points
    Energy

    SOLAR TERMINOLOGY

    Have a looking for it now :> I do believe I can find wetkits Solar Panel mounting on my side. I do believe the error is on my side so sorry about that Gents and Ladies. When I upgrade the Forum Platform for new security updates it flushes out the files. In the future I will download them all and re-upload them after the upgrade- I take the forum security very seriously. Thanks for all I promise to get them! Hope this helps! Jay
  24. 2 points
    The Terrible Triplett

    Grid Tied Inverter

    Give that supplier a Bells!!!
  25. 2 points
    watkykjy1

    ICC version 2.3.0 out now!

    Apology accepted ;).
  26. 2 points
    plonkster

    ICC version 2.3.0 out now!

    Post edited. I decided to just go with a straight apology. Clearly I offended you. I don't know anything about the code quality and it was not my intent to comment on that. I doubted that you have that kind of stamina and had a bit of a knee-jerk outburst. There is no personal gain for me here. The software I work on will never enter this market.
  27. 2 points
    Johandup

    MORE ESKOM WOES... is that possible?

    Ek bewe te veel... Drink ook nie baie nie want ek mors te veel. Lol
  28. 2 points
    Where are you measuring? Measure directly on the L+N output terminal of the inverter, if still 108v then the inverter is faulty - there is no ways that any inverter should allow a voltage drop of that nature without dropping out.
  29. 2 points
    Hi @gabriel, the problem is that if the "expert" bricks your inverter, he may turn on to be an even more agile fly by night and simply disappear, leaving you with the expensive brick. What brand name appears on your inverter or perhaps you could post a photo or two so folks can see if it can be identified. I for one would be really interested to see what is being sold whether the genuine article or not. My USB-Serial converter has worked flawlessly thus far and I have flashed several versions of the CoulombWeber firmware to four inverters at several times without mishap. That includes flashing the version 4.1 of the SCC firmware. I hope the computer with serial port does the job for you. It seems to me that the real experts are to be found on this forum and advice is always forthcoming when one posts a question. Best policy is to learn from these fellows rather than some off the street "expert" recommended by an installer about whom you already have reservations. Best expert is always oneself because it is your pocket that will be hammered if things go wrong.
  30. 2 points
    plonkster

    Amount of solar panels

    That seems a tad much. I should have noticed that the first time round. I usually try to temper my skepticism about these cheaper inverter/charger's ability to run at max for extended periods of time, but I've seen what a high end European MPPT does at 50% oversizing (it logs overcurrent events) and I doubt the cheaper ones are going to be better: so I stick to my general advice to stick to 20%, and you're already there. So for your application it might be better to add an external MPPT charger for the extra panels (which is rather a lot of overhead cost for just three panels). But there are more complications. You have 300Ah of battery, so you're limited to 60 amps charging current (and that is pushing things a little), while 4500Wp gives you a potential 90A peak charge current. Now the internal MPPT in the Axpert can be configured to limit to a safe level, but the moment you add an external MPPT there is no such possibility. I think what I would do is 1) add a second MPPT, 2) point the panels in a slightly different direction, for example point them North West so they make peak power around 3pm. You get the same energy, but a flatter curve instead of a very high peak, and you catch more of that late afternoon Summer sunshine.
  31. 2 points
    The Powerforum Public Online Discussion Forum - www.powerforum.co.za was established in 2013 to share knowledge. A lifetime of shared knowledge is invaluable. The goal was to create an open sharing platform that will encourage creativity and spark new ideas as well as to allow members of the public to make informed decisions before spending and investing large amounts of energy and capital installing solar as well as renewable energy products at their homes or offices. Whether you are just beginning your journey towards energy independence or already have years of hard-won experience under your belt. Everyone is welcome on the Powerforum. I have a passion for the Domestic Wind Turbines and Solar LED Lighting. It is my ethos to never make use of the forum for my own financial gain in anyway. The Power Forum Server costs, upkeep and platform are happily funded by myself. I hope it will be of good service to everyone. It is my magnum opus for all. Sincerely Jason Back https://www.linkedin.com/in/jason-back/
  32. 2 points
    Noticed your comments after I had posted mine @Pieta and we are telling the same story. The update program will certainly not see the COM port if you entered the wrong one. Good luck @gabriel. I hope all works well.
  33. 2 points
    @gabriel I just run the updater from a Windows 7 laptop as a user and all works well. This is the same problem I had last time. Go to Control Panel on the laptop and open Device Manager. Look under Ports and see which COM port the USB to Serial converter selected. Mine selected COM2 last time. Then set the update program accordingly and try again. There is always a nail biting wait from the time the update program detects the COM port before it starts to upload the new firmware so just be patient for a minute or two. Make sure the firmware is 73.00b or you will have to upgrade again as I will have to do because only 73.00a was available when I updated about 3 weeks ago.
  34. 2 points
    Chris Hobson

    Axpert 5KVA No Batteries?

    HI Allen Welcome to the forum. That second hand Trojan bank would to my mind be the answer to your predicament. We probably distantly related. My great grandfather was the eldest of 17 children. Where everyone else has a family tree I have a family thicket.
  35. 2 points
    Here is a thought ... others to confirm! Option one: If it was me. Find the faulty battery/ies using a load tester. Why? If they short, they will overheat and may pop. Gets quite messy, all that plastic and acid all over see? Then, with what is left, get the bank working again, never use it to power anything at night. Use all the power in the day. Continue this until all the batteries are shot, replaced with the cheapest ones, even 2nd hand, you can find. The only risk, do NOT let the batteries overheat. Option two: There is a Trojan bank for sale here on the forum ... I think R17k, if you don't like the above idea, which I have done myself just to keep a system going daytime. Option three: With all T&C's completed, go grid tied. Sell inverters and the batteries (for scrap lead if they are shot) and look at say a SMA grid tie inverter.
  36. 2 points
    The Terrible Triplett

    Current Water Affairs.

    5mm where we live this weekend. Drove to Bonnievale this past weekend, clouds before Sir Lowry's pass, clouds after the pass and some rain after Grabouw. Was so excited about the rain.
  37. 2 points
    Nope. Jip, therein lies the rub with solar systems. Panels and inverters are cool, batteries ONLY when you are off-grid. Not in the cities. Now some will tell us otherwise, wait till they have to replace the battery bank the 1st time. Do you need to run stuff off batteries at night? I keep my bank as small as I can, for it used to be for power failures. Today I am keeping it above SOC of 80% to see if I can get the 4000 cycles out of them.
  38. 2 points
    ebrsa

    Optimal setting on Axpert

    @gabriel I am glad to see you have found the gremlin in your system and have all under control. Just in case you have not noticed, Coulomb and Weber updated their firmware to 73.00b and that is what you should use if you decide to flash your Axpert with their firmware. The link to their old 72.70b firmware is http://forums.aeva.asn.au/viewtopic.php?p=64096#p64096 and it contains a detailed explanation of the flashing process. Also it is stated that it is no longer recommended to flash the SCC firmware which one less thing that may go wrong. Their AussieView manual is worth downloading and printing as all the new displays and functions are explained. I for one would be somewhat lost without it. I noticed that your Axpert parameter 12 is set to 48V. Just for information, when I installed ICC ( it was AICC then ) Jaco Fourie who started it with Manie advised the one should set that voltage fairly low, perhaps 44V, as otherwise it will interfere with ICC which would then not work correctly. With ICC and a BMV controlling the Axpert, one wants to make sure that the Axpert's own settings don't clash and try to take over.
  39. 2 points
    pilotfish

    Optimal setting on Axpert

    Remember that the BMV will probably report 100% when you remove and restore power because it must start somewhere. Make sure that your Axpert reports full voltage and 100%, then sync the BMV and even if not perfect it will correct itself over time. Make sure that BMV amps reading makes sense.
  40. 2 points
    SolarNoob

    Optimal setting on Axpert

    If I can add my 2 cents. I have had the same issue in the past. What I did to correct the issue is enter the setup on the BMV and go to setting 9, ‘zero current’ and zero out the current. This obviously needs to be done when you know there is no current draw from the batteries. Then hold + and - buttons together until the BMV beeps to synchronize manually. That should have you sorted. I have found that changing the tail current setting will cause this drift.
  41. 2 points
    pilotfish

    Optimal setting on Axpert

    Hi @gabriel, There seems to be a problem with one of your reporting devices, either Axpert or BMV is lying and I am beginning to suspect the BMV (because we all know that in an Axpert/Victron environment the failure is highly unlikely to be on the Axpert side). Looking at your Dashboard output above something doesn't quite gel - A lead acid battery at 69.5% SOC and that is busy discharging is never going to be at 54.94V, the numbers don't tie up. Please send a pic of your [inverter/bmv values] page so that we can compare the outputs from the 2 devices, and also measure the bank voltage with a multi-meter at the same time and charge/discharge state as when the screen grab is taken, the multi-meter will be used to catch the liar.
  42. 2 points
    @Coulomb, I'm not a member of the other forum but I read through that quickly. Some ideas. First, 30 seconds seems a bit short. Just thinking about the Victron BMV's full detection (tail current drops to below a certain configurable percentage for a configurable time) defaults to at least several minutes, and the general advice is 10 to 15 minutes. I think the reason for the 2A figure might be for practical reasons. I read somewhere (might have been your forum) that the Voltronic doesn't have a current sensor on the battery side, instead it infers the current from the AC measurements (The Multi does that too). This means battery measurements under about 1A is inaccurate (the same is true on the Multi), so quite likely the lowest whole number it can actually measure is 2 ampere. You guys know the guts of that thing better than I do, so it is possible that I am way off base here... but the number rang a bell for me. On planet blue it is very similar, the lowest sort of accurate number you can set is 2 amp per parallel unit.
  43. 2 points
    plonkster

    Current Water Affairs.

    "THE men whom the people ought to choose to represent them are too busy to take the jobs. But the politician is waiting for it. He’s the pestilence of modern times. What we should try to do is make politics as local as possible. Keep the politicians near enough to kick them. The villagers who met under the village tree could also hang their politicians to the tree. It’s terrible to contemplate how few politicians are hanged today." ~G.K. Chesterton: Cleveland Press interview (March 1, 1921).
  44. 2 points
    plonkster

    New member and new to solar power

    Nee, jy dink aan 'n Foton Tunland :-)
  45. 2 points
    Here is a video I just happened across. What happens if your panels are damage by hail or fire?
  46. 2 points
    Zimnismoboy34

    Pylontech US2000B Plus

    Gents i know you mention voltage drop here ..... and yes it does happen on cabling that isnt sufficient from source being the battery to the load being the inverter, and the V sense port on the victron is very important for making sure this is compensated for both on charge and discharge, but i must tell you something in relativity to the conversation, SOC determines voltage sag on Lifepo4, if you take a fully charged cell and discharge it fairly steady with a good current draw it will hold its own provided you not demanding alot out of it .... meaning you will see figures of around 3.2v per cell under load at a 80% soc .... but here is where it gets interesting try the same load at a lower soc say at 30% you will see the cells ability to deliver energy changes, the characteristics of Lifepo4 are such that the lower the soc % the more the sag at high demand, some cells are better then others in this regard, Sinopoly do sag more under low soc where as the likes of headway and Calb dont, be careful that you are not basing you voltage sag on the actual cells ability to delivery current at a low SOC %....
  47. 2 points
    Chris Hobson

    New member and new to solar power

    I don't want to interfere too much but is SolarNoob's bank compatible with your first bank in terms of age and usage? I don't want to do SolarNoob out of a sale (his bank is at good price) but I also don't want you to buy them and later discover that you perhaps should not have bought them.
  48. 2 points
    How did you check it? It's a ceramic fuse filled with a sand-like substance specifically to extinguish the arc. The only way to check it is to test that it isn't open circuit, eg use a DMM and check the resistance or one of those automotive test lights and a power source. You cannot tell by visual inspection.
  49. 1 point
    If that is true the code quality is going to be sh*t. Unless you had three people working on it :-)
  50. 1 point
    @gabriel I opened Device Manager on my Windows10 PC and checked the Ports. I had 2 COM ports active. Then plugged my Unitek USB-Serial converter into a USB hub connected to the PC and immediately it was recognised as Prolific USB to Serial Converter (COM4). I bought it from https://scoop.co.za/ in Montague Gardens, just off the N7 turnoff at the refinery but in a side street to the right. Or perhaps you can mail order it. Look under Manufacturers > Green Connection where a USB-Serial converter is listed although not Unitek but Green Connection. As a first effort I would suggest that you try and find the right driver for the converter that you have. However from information on the Internet it would appear that some of these converters just don't work properly as they use a copy of the Prolific chip. The last thing you want is an unreliable connection to your Axpert when flashing firmware. Which brand is your Axpert. Mine is branded Proline from Pinnacle and since I have never had any problems in flashing the firmware, I am confident it is a rebranded Voltronics Axpert. Hopefully yours is also the genuine article, otherwise it may not be a good idea to try flashing the firmware as @Coulomb has often warned. Good luck but don't hesitate to request help if things remain troublesome.
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