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fritserasmus

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Posts posted by fritserasmus

  1. :D:D,

    I was the fool in this chapter.

     

    I introduced a MQTT server on my network for IoT and one day when I was on ICC saw this tick and suddenly that light in my head lit up as I knew what I could do with the feed. So I ticked it and filled in all the info. Sure enough I protected my MQTT server by adding UID and PW layer but ICC did not cater for that. So I did not give it a second thought and signed off. Obviously ICC gave up after a period of time not able to connect and reported it.

    Today that snake sneaked up on me and bit me. 

    Well its sorted now. 

    I suppose the question is: which ICC version allows MQTT UserId and PW........

     

  2. I have not been accessing my RPi ICC for quite a period of time, so I do not know when it started to happen.

    Today I logged onto my desktop using VNC and notice this error messages:

     

    Reboot, restart.. nothing seems to make it disappear.

     

    I do not have solar connected to my system although used to have.

    SMA's provide solar power and Axpert charges batteries from input power - Axpert think it is grid, but could be grid OR solar from SMA

     

    Licence valid to 29-03-2050.

     

    Any ideas / suggestions from the clever guys?

  3. 35 minutes ago, maxomill said:

    hi there

    I have 1 big array  which is divided into 3 and 1 west facing array for more afternoon sun  . I have a energy monitor  measuring all the solar panel dc power as the 4 are all in parallel . but with 4 disconnects so that I can  switch on/off  and  see any abnormalities  .

    I like keeping  panels in equal numbers . it may costs a bit more on wiring  but you can easily check for discrepancies and faults  .

    and no I cant monitor it on the computer so it may not help you but its a solution of some sorts

    cheers

     

    Maxomill, well, I have the STD feed into SMA site , but I actually would like to add graphs to the EMONCMS screen graphs, so I can pick irregularities up as it happens.

    I also have 4 DC switches, that I can flip, but I prefer the computer Monitoring route

  4. 3 hours ago, Sidewinder said:

    From a quick Google I can see that SFB Spot "sees" the following values that it uses to get info into pvoutput.org.

    //valuetype
      //0x2601=Total Yield Wh
      //0x2622=Day Yield Wh
      //0x462f=Feed in time (hours) /60*60
      //0x462e=Operating time (hours) /60*60
      //0x451f=DC Voltage /100
      //0x4521=DC Current /1000

     

    So look's like it's all there. I would think that if you use Arduino to do this, then you may just be in luck getting values store into EMONCMS. Thanks exactly what I've been doing with my geyser temps. But i read you're using a RPi. More reading then....

    Having to purchase a Arduino to achieve that goal is a cheap run.

    @Sidewinder, I know I cannot bribe you with a bear :-), but how many coffees and Cokes for some pointers and help me to manage to feed readings into ICC EMONCMS? :-)

  5. 3 hours ago, Sidewinder said:

    @fritserasmus

     

    I don't know the SMA's from a bar of soap, :lol:, but I would hope that it has a comms port, like most modern Inverters, and over it is spews out a continues streams of data. I suspect this to be problematic, as you are already using the comms port  SBF Spot export.


    @Manie

    @Manie

     

    @sidewinder, the SMA's do not have a comms port as suggested. :-(

    I am using the built in BlueTooth connection from SMA and Pi to establish the communication.

    No wires between the Rasberry Pi and and the two SMA's .

     

    I still have to check this suggestion: RS485->USB converter  of  @plonkster

  6. 12 minutes ago, plonkster said:

    Allegro ACS712 chip

    Like this: https://www.lazada.com.my/usb-to-rs485-485-converter-adapter-ch340g-chip-23021431.html

    11 minutes ago, plonkster said:

    Probably easier to measure this on the AC side, which is what I assume you wanted to do anyway.

    Correct. I want to know DC; what is production.

    12 minutes ago, plonkster said:

    RS485->USB converter

    As you said: This is probably easier: BUT will I be able to feed readings into an emonCMS? - (Steep learning curve here for me!) :-)

     

  7. I have two SMA SB 4000TL 21 inverters. Each has two two MPPT controllers and I also have 2 strings of PV arrays connected.

    I therefore have 4 arrays feeding into the two inverters. Two are facing East and Two are facing West and the two Eastward facing arrays differ in size.

    I would like to monitor the power production PER array.

    Using the emonPi and emonTx with 4 CT sensors, can I monitor production per string? ( https://shop.openenergymonitor.com/emonpi-2/ ) + ( https://shop.openenergymonitor.com/emontx-v3-electricity-monitoring-transmitter/ )

    This power will be DC and ideally I would like the numbers to add up. So: adding these 4 lines power production together, should match the inverter output production.(which I am measuring at present)

    The reason I want to measure these lines is to identify any abnormalities as early as possible.

    Your advice and or comments will be appreciated very much.

    (As a side note: I would like to mention I am using SBF Spot (  https://github.com/SBFspot/SBFspot  ) log the power production and feed to PVOUTPUT.ORG) These reading are NOT fed to an emonCMS database though. It also sends ONE reading per inverter to PVOUTPUT and not a reading per line)

    Regards


    Frits

  8. Frits,
    If you look under icc settings, there is a dropdown for Inverter selection. You need to STOP ICC.., then the dropdown will become active. It will show the list of inverters supported. 


    Thanks@sidewinder
    I knew there was a list but did not know I just had to stop ICC.
    Thanks

    Sent from my EVA-L19 using Tapatalk

  9. @ColinvS, how can I integrate these two inverters so I can use the 10 Kw PV arrray power during daytime.

    In the above schematic (If i understand it right) only 4 Kw can be utelised.

    Can I wire it so that I can use both the Infini and Axpert capacities?

     

    I do have a Axpert and considder adding an Infini but would like to connect geysers to warm in turn plus the rest of the house EXCLUDING oven.

    The idea would be to set Infini to be SGB. (Need advice on what the Axpert should be to accommodate demand at night time if tumble drier and dishwasher runs together e.g.)

     

    If there is a solution - I will be happy - else will have to wire the DV in 3 separate strings:

    Grid - Oven & AC

    Axpert - Lights, TV and Fridges (with Batteries) (3 KW PV)

    Infini rest without bats (think ............hmmmm what should I do) 3 + 3 Kw PV with feedback into grid when demand is lower than production.

    (Lucky I can do the feedback legally)

  10. @Nico die twee belangrikste oorwegings vir my om die Raspberry PI te gebruik was

    1. Die feit dat Linux net soveel meer stabiel is in die PC omgewing. Dit het nie gereelde reboot nodig nie
    2. die feit dat 'n PC maklik 300 Watt tot 600 Watt op "Base load" bytel, waat die Raspberry Pi slegs 2 Watt (Twee watt) gebruik om dieselfde taak te doen.

    Ek het nie MQTT nie en is heel tevrede met die grafieke wat ek kry:

    Soos jy kan sien: omdat die son onder is, produseer die sonpanele geen krag, My Base is tans 460Watt en batterye is 97,4% vol

    Domestic.jpg

    Bietjie meer langer termyn grafieke:

    Langer.jpg

     

    Nog 'n paar grafieke:

    Langer2.jpg

     

     

     

  11. @Johan van der Merwe, email my jou telefoon nommer: frits.erasmus at gmail dot com.

    Ek het so getik dat scrapers dit nie optel nie, so jy behoort dit te kan uit "figure"

     

    Die kabel op jou foto 2 is die een wat jy moet gebruik.

    die plug tussen jou duimnael en indeksvinger gaan in die gat onder die inverter gemerk "RS232"

    Die plug aan die draad wat blou is prop by jou pc in. As dit NIE daar pas nie kort jy die RS232 to USB converter.

    soos die:   http://www.dx.com/p/usb-2-0-to-rs232-serial-9-pin-db9-adapter-converter-black-141463?tc=ZAR#.WP8vatwlFhE

     

    Ek sal jou bel as jy steeds sukkel. Stuur net 'n epos met jou selnommer of telefoon nommer waar ek jou kan bel

  12. @Johan van der Merwe, Het jy 'n PC met 'n Serial poort? Indien ja kan jy die kabel wat saam met die Axpert kom gebruik. Indien NIE, sal jy 'n converter moet koop wat die serial na USB omskakel.

    Verder is dit dan is die eenvoudig.

     

    Die regter donker groen is die RS232 serie poort wat jy graag op jou pc wil he om mee te konnekteer.

    IMG_20170425_130530.jpg

    Anders moet jy so iets kry:

    http://www.dx.com/p/usb-2-0-to-rs232-serial-9-pin-db9-adapter-converter-black-141463?tc=ZAR#.WP8vatwlFhE

     

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