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Solar PV Performance Thread - Post your monthly output



  • Registered Users Posts: 2,529 ✭✭✭bullit_dodger

    Colors reversed but I have the same chart (albeit I start mine at last Nov - LOL)

    Should be good to clear 5-10% over June's estimate (here in Dublin)

  • Registered Users Posts: 12,330 ✭✭✭✭DrPhilG

    Barring a disaster tomorrow I'll meet my expected target for the month.

    Mind you my target is just what I got last year, adjusted for the additional capacity. So monthly target is 801kWh. I'm now on 784kWh so only need 17kWh tomorrow.

  • Registered Users Posts: 4,951 ✭✭✭paulbok

    Gonna be 5kWh short for the month. But over 100kWh ahead of forecast for the year.

    Edit: ended up 2kWh ahead for the month afterall 😁

    Post edited by paulbok on

  • Registered Users Posts: 2,735 ✭✭✭yankinlk

    700 in May and 657 in June. First year so still learning what's normal.

    really happy with the self-use rate. 5kw battery on a 6.6kw system.

    Post edited by yankinlk on

  • Moderators, Education Moderators, Home & Garden Moderators Posts: 8,171 Mod ✭✭✭✭Jonathan

    4.83kWp south facing, Dublin Fingal

    626kWh generated

    204kWh exported (67% solar self-consumption)

    14kWh imported (4kWh day, 10kWh night)

    34kWh generated best day (1st June)

    5kWh generated worst day (5th June)

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  • Registered Users Posts: 12,330 ✭✭✭✭DrPhilG

    June Stats

    7.44kWp (4.03 south/3.41 west), 20kWh battery, Zappi & Eddi – Donegal

    Generation – 809kWh

    Export – 50.3kWh

    Import – 3.8kWh

    Best day – 4th, 50.3kWh

    Worst day - 2nd, 11.5kWh

    Days with less than 1kWh purchased - all of them.

    Post edited by DrPhilG on

  • Registered Users Posts: 1,874 ✭✭✭garo

    4.8kW EW Dublin. 10kWh DIY battery

    June 2022 (kWh):

    Production: 621.1 (560 predicted, 663 last year)

    Consumption: 758.6

    Import: 151(39d, 112n)

    Export: 13.5 (90 last year) - would ya look at that!

    Best day: 20th: 31.8

    Worst day: 5th: 5.7

  • Registered Users Posts: 3,209 ✭✭✭irishchris

    9.86kwp (2.88 West & 6.98 South)

    June 2022:

    Generation: 1012kwh

    Import: 18kwh

    Export : 556kwh --- FIT@13.5c = € 75

  • Registered Users Posts: 4,951 ✭✭✭paulbok

    6.84kWp south facing, Roscommon. 4.8kw battery.

    759kWh generated (757 forecast)

    (83.1kWh to Eddi)

    (92% of total consumption self produced)

    Total consumption 675kWh. 215kWh discharged from battery. 183kWh exported

    49kWh imported (no day/night meter, but bulk imported during night, early morning)

    47.6kWh generated best day (20th June)

    14kWh generated worst day (24th June)

  • Registered Users Posts: 2,497 ✭✭✭ECO_Mental

    June 2022

    6.1 kWp South facing in Cork

    Generated 742 kWh

    Used 327 kWh (44%); exported 415 kWh

    Money Saved on energy bill from PV for this month 327kWh * €0.30 = €98.10

    Estimated Potential FIT @14cent/unit = €58.10 (not realised as don't have smart meter and I am with EI so just a hopeful guess)

    Overall for the month it was below expected and even less than March, but overall my system is about 11.5% over the estimated PVGIS SARAH estimate. I included this month how much my PV system saved me on my electricity bill as its a simple calc and it should be useful for people to see the potential.

    6.1kWp south facing, South of Cork City

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  • Registered Users Posts: 2,529 ✭✭✭bullit_dodger

    South Dublin rocking in with 5.3Kwp split (1.5Kwp East/3.8Kwp West)

    Not one "perfect day" with smooth curves. Shame as I was quite hoping to see what the max daily system generation is. The monthly max I did get was 33.93Kwhr (June 20th), but that was beaten by 34.6Kwhr on May 19th, so there's probably 35-36Kwhr in it.....if we had a clear coolish day in June. Maybe next year. LOL

    Still overall pretty happy with this as it's close to May and was still 14% over the PVGIS estimate.

    Dare I say it.....days are getting shorter now folks <sniff>

  • Registered Users Posts: 680 ✭✭✭rgfuller

    8th Month

    Dublin - Lucan - June 22 - 7.12kW total installed (S: 3.45kW, E: 2.41kW, W: 1.38kW). E&W Optimised. 5KWh Battery, (30 S & 22.5 E/W degree pitch).

    Total Generation: 764kWh (224kWh consumed directly, 158kWh into battery, 382KWh to grid)

    Best Day: June 20th - 41.0kWh

    Worst Day: June 5th - 7.0kWh

    Total Consumption: 420kWh (91% Solar:9% Grid Import (39kWh))

    Milestones & Info:

    59kWh to Eddi

    4th Month Generation Exceeds Consumption

    12 Days no import (same as May) :: 4, 7, 8, 11, 15, 19, 20, 21, 23, 25, 26, 30.

    Passed 3MWh generated since install last October.

    Monthly Expected FIT €53.48 :: Money Saved on Energy from PV :: €85.69 :: Total Savings €139.17 for June.

    Expected FIT since Feb 15th €188.30 :: (24KWh Feb, 254KWh Mar, 272KWh Apr, 413KWh May, 382KWh June : Total 1325KWh)

  • Registered Users Posts: 1,606 ✭✭✭THE ALM

    South Roscommon, 8.16Kwp, facing 210° 35°

    Total generation 942kWh

    Consumed 730kWh

    Energy from Grid 27kWh

    Energy to Grid 222kWh

    To the Eddi 165.2kWh

    To the Zappi 228.7kWh

    To the Battery 151.6kWh

    Not a perfect day in the month with only a few over 40kWh with the best at 55kWh and the worst 12.4kWh. Up 77kWh on projected figure and down 47kW on last month, should be able to push past the 1MWh if we had a few good days in the month.

    Hopefully the new batteries are on the high seas so will be able to make more use of the generation.

  • Moderators, Sports Moderators Posts: 19,029 Mod ✭✭✭✭slave1

    Nice one, almost hit the 1Mw

    My stuff for sale on Adverts inc. EDDI, hot water cylinder, roof rails...

    Public Profile active ads for slave1 (

  • Moderators, Sports Moderators Posts: 19,029 Mod ✭✭✭✭slave1

    Housekeeping, your grid-battery-house losses look low, someone here measured them and about 9% in and out so around 18% in total

    My stuff for sale on Adverts inc. EDDI, hot water cylinder, roof rails...

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  • Registered Users Posts: 1,576 ✭✭✭celtic_oz


    only gave 8% to the grid

  • Registered Users Posts: 2,529 ✭✭✭bullit_dodger

    GivEnergy's batteries rock in (as per the spec) at 92% efficiency. I'm actually low (on the poor side) with 91%. The numbers I've listed are from the inverter itself, (Battery in & battery out). Sure, I guess the inverter could be wrong/lying, but without doing a couple of tests myself taking note of the ESB meter, setting the house to a super low base load, charging the battery, then discharging the battery with a known load and counting the time, or using something like,

    Power Meter Electricity Usage Monitor, Maxcio Upgraded 13A Energy Monitor with Backlight LCD Display/7 Monitoring Modes/Backup Battery, Overload Warning Watt Volt Amp Meter UK Plug for Home Appliances : DIY & Tools

    (I own a similar plug above)'s hard to definitively say it's wrong. When we get back to wintertime and I'm charing the battery to 100% from grid at nighttime I might give it a lash to see if it's right/wrong, but yeah, the spec is 92% or so they claim.

  • Registered Users Posts: 2,335 ✭✭✭SD_DRACULA

    7kwp West Dublin, 20kwh battery, S facing

    Best day 25th: 47kwh

    Worst day 5th: 7kwh

    Battery efficiency: 91%

    Just to compare with last year which was about 100kwh better

  • Moderators, Sports Moderators Posts: 19,029 Mod ✭✭✭✭slave1


    4.1kWp SW with Winter Shading, 3.3kWp NE

    415kW imported (two EV household)

    752kWh Generated

    656.37kWh consumed

    327kWh diverted to Eddi

    127.9kWh diverted to Zappi

    Approx 823.7kms of range into the EVs

    Highest was 42.5kWh

    Lowest was 11.9kWh

    81% self sufficient (excluding Evs)

    61% self sufficient (including Evs)


    Monthly cash saving based on average daily load and all non-load items like dishwasher/washing machine/immersion at night rate, €66.77

    April/May/June have been poor compared to last year, around 10% adverse

    My stuff for sale on Adverts inc. EDDI, hot water cylinder, roof rails...

    Public Profile active ads for slave1 (

  • Registered Users Posts: 485 ✭✭septicsac

    852 Generated, still not matched March, albeit one day less.

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  • Registered Users Posts: 3 Gan-Ainm

    June 2022 Stats

    4.7 kWp (2.7 ESE / 2.0 SSW) Galway

    Eddie, 2.4 kWh Battery

    Generated- 527.6 kWh

    Export – 197.7 kWh

    Import – 69.3 kWh

    Usage - 349.1 kWh (69.2 from Battery)

    Best day – 6th, 31.3 kWh

    Worst day - 24th, 6.9 kWh

  • Registered Users Posts: 618 ✭✭✭handpref

    5.4 east west split

    690 kWh for June

    36.43 kwh’s was the best day

  • Registered Users Posts: 228 ✭✭curioustony

    Roscommon, 4550Wp, Azimuth: 136° (SE), Slope: 24°

    🌞4.55 kWp, azimuth 136°, slope 24°, 5kW, 🛢️10.9kWh, Roscommon

  • Registered Users Posts: 15,208 ✭✭✭✭Ha Long Bay

    820KW for June with 140KW to the Eddi. 7.2KW South facing in Dublin. Best day was the 20th generated 46KW.

  • Registered Users Posts: 6,138 ✭✭✭championc

    June Stats

    3.9kWp (S), 10kWh battery, 22 deg Slope

     Generation – 424.61 kWh

     Consumed  - 291.32 kWh

     Import   – 19.04 kWh

     Export   – 107.31 kWh

     Edd9    - 4.5 kWh

     Zappi   - 85.8 kWh

    Meter Readings 05238 (01101 Day - up 2 / 04151 Night - up 13) - Gas 6252

    Totals so far:

    Month    |   2020 |   2021 |   2022 |
    January  |     75 |     56 |     81 |
    February |    122 |    142 |    111 |
    March    |    200 |    269 |    370 |
    April    |    279 |    373 |    372 |
    May      |    396 |    430 |    445 |
    June     |    264 |    425 |    425 |
    July     |    261 |    387 |        |
    August   |    254 |    264 |        |
    September|    268 |    248 |        |
    October  |    151 |    185 |        |
    November |     90 |     78 |        |
    December |     56 |     52 |        |
    Total    |   2.41 |   2.90 |   1.80 |

  • Registered Users Posts: 2,735 ✭✭✭yankinlk

    4.5 only for the eddi for a month? That doesn't seem like a lot ?

  • Registered Users Posts: 6,138 ✭✭✭championc

    I was away for half of it, and I have 30 solar tubes too, so there were days I absolutely did not want to add more to it.

  • Registered Users Posts: 15,350 ✭✭✭✭AndyBoBandy


    Produced 603.3kWh

    worst day: 5th: 5.9kWh

    beat day: 6th: 29.2kWh

  • Registered Users Posts: 6,214 ✭✭✭Ubbquittious

    245kw from 2.4kwp this month. This is the first full month it has been connected. I'm already sorry I didnt put in more. I could do with at least 5kwp + tubes for heating the water because it covered only 1/3 of total electricity usage.

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  • Registered Users Posts: 6,138 ✭✭✭championc

    It's quite possible that a lot of that other usage could be at hours which are not covered by solar.

    And with your 2.4kWp, how much did you export ? If you exported, then you would only likely export more if you had more panels.

    Hopefully your self use is quite high