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Daily pv production



  • Moderators, Sports Moderators Posts: 17,432 Mod ✭✭✭✭ slave1

    22.9 through lots of rain and cloudy skies, benefit of two arrays

  • Registered Users Posts: 697 ✭✭✭ Bif

    3.9.22 - 6.9 array

  • Registered Users Posts: 820 ✭✭✭ silver_sky

    1.7kWh in North Co. Dub today. I should have charged the battery last night but there wasn't actually much use today in the house anyways. Battery is at 20% now only getting just a bit above 30% during the day.

  • Registered Users Posts: 26 Chancer20

    A record (low) day yesterday of just 3.4kWh (Co. Wexford) since solar was installed in June.

    We were lucky that it was our Free Weekender day from EI.

    The sun is out again today. 👍️

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  • Registered Users Posts: 678 ✭✭✭ fuse

    I've been using

    Must check out your method Bullit_dodger

    On day 3 of solar. Trying to figure out the best way to access the raw soliscloud data. Any pointers?

  • Moderators, Education Moderators, Home & Garden Moderators Posts: 7,611 Mod ✭✭✭✭ Jonathan

    Raise a ticket with Solis and they'll give you an API key.

    You're better off pulling data locally using Modbus though. Realtime and more efficient.

  • Registered Users Posts: 1,718 ✭✭✭ SD_DRACULA

    Brutal in Dublin today, estimate way off 😥

  • Registered Users Posts: 5,428 ✭✭✭ championc

    If my panels aren't as clean as the day they were installed, then there's no hope !!!

  • Registered Users Posts: 1,718 ✭✭✭ SD_DRACULA

    4kwh so far, probably first night I'll have to charge from grid since the good weather.

    Tomorrow looks as bad.

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  • Moderators, Sports Moderators Posts: 17,432 Mod ✭✭✭✭ slave1

    I had 10 of mine tilted to 60degrees and reduced that to 37degrees at the weekend, I noticed them quite dirty compared to my fixed 45degree panels. I'll give them a gentle wash perhaps at some stage

  • Registered Users Posts: 11,486 ✭✭✭✭ DrPhilG

    2.8 on the 3rd, 28 on the 4th.

    This country is nuts.

  • Registered Users Posts: 1,718 ✭✭✭ SD_DRACULA

    The load shifting has begun early this year

  • Registered Users Posts: 26 Chancer20

    Post deleted.

    Obviously I don't know what I'm talking about.

    Post edited by Chancer20 on

  • Registered Users Posts: 12,555 ✭✭✭✭ AckwelFoley

    First day.

    8.1kw so far at time of posting. Pretty good considering the terrible dull weather.

    Every little helps

  • Moderators, Sports Moderators Posts: 17,432 Mod ✭✭✭✭ slave1

    It wasn't the dust or bird poo, the heavy rain cooled down the panels thereby increasing panel voltage and in turn your kW generation

  • Registered Users Posts: 26 Chancer20

  • Moderators, Sports Moderators Posts: 17,432 Mod ✭✭✭✭ slave1

    a) Your stupid assertion is your own

    b) You seriously want to extrapolate a Sahara Desert study of sand dust impact on PV Generation into Ireland

    It's been noted year for years that there will be a strong peak in generation immediately after rain has cooled down the panels during "Summer" months i.e. dark clouds and rain clear to sunburst = peak. This impact is much less in Winter/Spring as the panels have not gotten as hot during the day, hence April/May are the typical highest generation months

  • Registered Users Posts: 12,555 ✭✭✭✭ AckwelFoley

    Ended up with 15.5kw yesterday which was pleasing for day 1 of full production. We used no grid yesterday.

    Not so confident today with our 583w output through the clouds

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  • Registered Users Posts: 762 ✭✭✭ DC999

    Sweet. What size did you get in the end? Lot more than I got in Dublin yesterday

  • Registered Users Posts: 12,555 ✭✭✭✭ AckwelFoley

    6.56kw of panels. ..I was quoted for 16 x 340s

    But ended up getting greedy and went with a higher output panel 16 x 410s

    Ticking over slowly now at 2kw/h

  • Registered Users Posts: 26 Chancer20


    Is there any way to block people on here?

    Edit: Yes there is. All done.

    Moderator or not, nastiness is really acceptable, and you should know better.

  • Registered Users Posts: 26 Chancer20

    I'm adding back my comment:

    After the rains, my panels have increased in power back to their original output when fitted in May.

    Someone tried to tell me it was because the rain cooled the panels down 😂

    While that might be a half decent explanation, it does not explain why the panels had full output in the early hot days, but the power decreased in time and as the panels became visibly dusty and covered in bird poo. Then it rained. The panels are shiny clean and the power went back up to their original output. What was irrelevant was the temperature, as it was not hot on the day before the rain, and it wasn't much different after.

    So there we go. Proof that dust and bird poo does affect output.

    And not forgetting that the supplier of my panels also reminded me the panels would occasionally need a clean to keep them at optimum output.

    So as I stated before, don't call me stupid unless you can back up your own claims with proof.

    So bored with this now. I came here for help and to add my own help to the forums, but it seems someone is out to get rid of me after only 8 posts. And a Moderator too.



  • Registered Users Posts: 1,848 ✭✭✭ bullit_dodger

    It's a bit of both Chancer. Dust, bird crap, shading etc will affect production, but there's many people here on the forums who've been using solar for many years and while dust will affect it......the far more prevalent and influencing factor is panel temperature. If you want the technical reason for this it's

    Effect of Temperature | PVEducation

    I don't typically get involved in slagging games, but as for anyone slagging you off, I think that's on you. Slave1 above was just mentioning that the only person who called you stupid was yourself where you said something like

    "forget what I said, I'm stupid" -

    and he was just mentioning that noone else thought that and gave you the right answer. People can be wrong (I'm wrong all the time), but the defensive nature is unwarranted man.

  • Registered Users Posts: 2,912 ✭✭✭ con747

    Bye 🙄

  • Registered Users Posts: 3,562 ✭✭✭ graememk

    Yeah 90-99% of it is temperature, We dont really get much dust build up (we dont go that long without rain/not much dust in the air...

    Its on the spec sheet of every panel, Temperature goes up, output goes down,

    My panels regularly clip in May and June, vs the hotter July & Aug (max ive seen on the really hot days was 5.5kW), Now as the temperatures drop outside, I should see some clipping again, although the days arent near as long as what we get in May.

    Another note, This years been a lot different from last, March was exceptional, May June July nearly had all the same output.

    Just variances in the weather we get.

  • Registered Users Posts: 2,632 ✭✭✭ yankinlk

    Back on track. The bird poo thing does interest me since I live next to a crow rookery. Definitely in the nesting months I considered up and giving them a wash... but I didn't bother this year.

    For sure next year I will do and see if I get a different result on average. Crows can leave very large splatters!

    Maye for sure was my best month for high highs... think the crows had moved on by then tho.😜💩

  • Registered Users Posts: 172 ✭✭ harderthanf

    It's temperature - in your case the rain lowering it. I experienced the same a couple of weeks after my install ( and plenty of times since ). Lots of people on here advised it but I contact my installers who told me the same. I then contacted Trina, the manufacturers, who also assured me temperature has a big impact on production.

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  • Moderators, Education Moderators, Home & Garden Moderators Posts: 7,611 Mod ✭✭✭✭ Jonathan

    My system will be installed a year this coming Saturday, so hoping to generate the 7kWh tomorrow needed to crest 5MWh for the year. The PVGIS-SARAH2 estimate was 4.47MWh, so very happy with that from a 4.83kWp system.

    @ECO_Mental your system went live around the same time (same day?), right?