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Thank you for the great forum, Safe Driving over the weekend. Sincerely Jason


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PaulF007 last won the day on August 8 2018

PaulF007 had the most liked content!

About PaulF007

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  • Birthday 18/04/1879

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    Color Control GX
    MultiPlus 48/3000/35-50
    BlueSolar Charger MPPT 150/70
    BMV 702 Battery monitor

    9 x Yingli 260 x Panels
    8 x Narada 6-GFM-170F Batteries

    A lot less money than what I had before all of this

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  1. Another way is to pull the data via node red (js) and then post to mqtt.
  2. I have a couple of them running at my place. (I have some arduino boards running so Wifi is not a option) One thing is that you have to keep them on the same line - the moment you go through a DB the signal is shot to much noise. The longest one that I had was about 900m and never had any problems with it. Just for in case it does not make sense DB >>>> PLUG 1 >>>>>>> PLUG 2 -- No problem Plug 1 >>>>>> DB >>>>>>>> Plug 2 - some times work but you will have issues. Also when I run the genny there is just to much noise so then it also does not work ... But that happens once a month on a maintenance run..
  3. There is a lot of variables that we just do not know. As you noted shading even on just one halve of one panel will have an effect on the production of the panels and with that flat angle there is a good chance that there will be shading of sorts.
  4. At that angle you are going to suffer during winter months. Summer will be fairly good in the middle of the day so that could account for the poor performance. Considering the batteries. Looking at your graph again I can see when you charged them at night and the curve suggest that they had a proper charge.Personally I suspect that they might then not be in the best of condition but I could be completely wrong. The only way to know for sure is to get a battery tester and test each battery under full load and check the recovery time. Just make sure that they are all well charged before you do the test else you will not get proper results. If you can not test them at this stage I would not use them during night time. Being in town you are not going to lose that much in terms of costs. You could then use them for backup when load-shed arrives again.
  5. Ok a couple questions: What is you max expected solar output : Is all your panels looking in the same direction : What direction is your panels looking at: What is the tilt of your panels: These should give us a understanding of what your setup looks like. My brother in-law has a system installed. (Quite nice) but as he is living in one of those townhouses roof space is a challenge. They ended up putting panels on both sides of the roof this resulted in him not getting full potential from them as they will be exposed to different solar "strengths" not much that could be done about it , apart from adding another mppt. But I agree , your output does not seem to match your description of the system.. Also a couple of other questions What is the size of your batteries : How are they configured : Reason for asking is that I have came across it where people switch series and parallel calculations . So 2 x 12v 50ah batts in series will give you 24v 50 ah whereby 2 x 12v 50ah in parallel will give you 12v 100ah ( Quite a difference in ah and "capacity" if you get it wrong) Last thought - There is a possibility that some of the batts could already be shot. Seeing that you are discharging them heavily , if they dont get charged properly they will not last long at all. You should maybe consider charging them for at least a full day without load just to make sure they are fully charged. A good indication will be if they cannot charge more than 1or 2 amps in the middle of the day ..
  6. I assume the blue line is the solar output , if so then yes you have a challenge as you have a almost perfect bell curve witch means that you are using your system optimal but also that your batteries will most likely not get charged well.Also you base load is quite high (500 w) during night time , but that is just a point of view... Maybe show a graph with you solar vs battery watts , this should also give an indication.
  7. That is one of the reasons the BMV is recommended. The data that you have is very limited and therefore almost impossible to judge from. As I remember the Axpert did report the battery amps charge / discharge. You could use that to determine the AH drawn and charged and that could , in a way , give you an idea as to if you are at least putting back what you have used. Have a look at the graph below. You will see that the batteries take as much as there is available until about 10 then start to drop away even though there is still plenty to offer from the panels. You could look at you data and check if the same happens on your system. If you get a similar curve you could assume that your panels gives enough juice. But again there is a huge amount of could , guess , might in there ....
  8. If I remember correctly it was a case of some maths. I manually added the units available in to the system and then used the daily kwH used from the grid to calculate the units left.
  9. The Used a live graph of the data that came in and set it to refresh every 5 sec. Then you place it below. This way you can see if the data feed is still active. I do know that there is a "active" plugin in emon that does the same now.
  10. Hello @patalhetas this was done ages ago so Some of it went missing but here is some of the Images that I still have and can be available here. You could edit them with something like GIMP or Photoshop (if you have a copy) Hope this helps!
  11. @Mark2 There is some picks on page one of my setup. Yes you are fairy screwed if you don't have pf.
  12. The only issue I had with Hassio was that remote connection was or maybe still is a pain. If you could not do port forward it was a huge mission to get it going. Openhab as an integrated remote connection via thier myopenhab.org site. What makes it even more attractive is that it is for free. Very nice Dashboards! One place it definitely outshines
  13. Have a look at this It was discussed at length back in 2016 , I wonder how much of the predictions came true
  14. Wow been a while since this one has came up. Ok here is one way to do it and this is from a pure $$ point of view in South Africa. Lets say you would like to do a basic setup with an Axpert. Thumb suck as I am to lazy to check for prices but it should set you back about R 150 k You will need to adapt your house hold consumption so that it fits n with the 4kw system as you will fry your batts if you dont. Now take your household consumtion after you have made the changes - Solar geyser , gas stove , low watts fridge , freezer and lights. Dont forget the TV ( These should also be added to you Total investment) Now lest look at the Value of you money - R 150 000 x 9% = R 13 500.00 / 12 = R 1 125 per month. Lett say current Eskom rate is R 2.50 per unit - R 1 125/2.5 = 450 unis So if your current consumption is less than 450 per month after you made your changes you will , in theory , never make back your money as the interest alone covers the units alternatively if you use more that that you should be good to make you money back over the term of about 10 years. Keep in mind that you are paying now and should not need to spend any thing over the rest of the term. As a side note I did do a much more comprehensive calculation a while back and it should be here somewhere on the forum but this should at least give you one principal that you could follow. Keep in mind that this is from a pure Cost vs Consumption.If you add loss of business as a result of Load shed that calculations will be much more subjective. Another note - depending on what system you add ,a solar system could even be a liability if you were to sell your house ....
  15. I would assume that Hassio also have a config file with all the necessary settings. So i have a small script running that will back up the config and node red files once a week to Dropbox as these are the ones that gets changed from time to time. Regarding the base OS I have a Full image backup on a hard drive with an extra SD next to the pi.Should it go belly up I can just swap the images. Update the config file to the latest and away we go. Three years later , touch wood , I have not had any problems --- yet --- . Although I am waiting for the Pi 4 os to get to the stage that it will boot negatively from a SSD. There are already a couple of workarounds to do this but Ill wait a little bit longer. There is also a project that is quite interesting to have a look at , IOTstact by Graham. He's a local and has done a tremendous amount of work. Also the place I got the Droobox script. Go have a look , well worth the 30 sec


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