If you have a new account but are having problems posting or verifying your account, please email us on for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact

Solar PV Performance Thread - Post your monthly output



  • Moderators, Sports Moderators Posts: 19,027 Mod ✭✭✭✭slave1

    That's a lot of exporting!

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

    Public Profile active ads for slave1 (

  • Registered Users Posts: 189 ✭✭connesha

    For summer, yea. Low roof angle generates a lot in summer. An EV in the next couple of years will take some of it. And I’m ok with exporting some of the year, regardless of FIT.

    March and April were close to consumption, so the marginal months look like they can be pretty mostly covered.

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

    That's a beast of a system. Just added 2.3Kwp DIY (exactly South facing) but that only brings me up to 7.6Kwp.

    Your rocking there for sure - that EV can't come quick enough :-)

  • Moderators, Sports Moderators Posts: 19,027 Mod ✭✭✭✭slave1

    Nice one, great to see us eeking out every possible drop of PV, as I'm driving around I do find myself with aspect envy these days

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

    Public Profile active ads for slave1 (

  • Registered Users Posts: 680 ✭✭✭rgfuller

    9th 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: 775kWh (202kWh consumed directly, 138kWh into battery, 435KWh to grid)

    Best Day: July 10th - 41.0kWh

    Worst Day: July 30th - 14.6kWh

    Total Consumption: 361kWh (94% Solar:6% Grid Import (22kWh))

    Milestones & Info:

    53kWh (approx.) to Eddi

    5th Month Generation Exceeds Consumption

    18 Days no import :: 3, 5, 7, 9, 10, 15, 16, 17, 18, 23-31st (on holiday).

    Passed 4MWh generated since install last October.

    Monthly Expected FIT €60.90 + Money Saved on Energy from PV :: €82.64 :: Total Savings €143.54 for July.

    Expected FIT since Feb 15th €246.40 :: (24KWh Feb, 254KWh Mar, 272KWh Apr, 413KWh May, 382KWh June, 435KWh July : Total 1760KWh)

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

    4.8kW EW Dublin. 10kWh DIY battery

    July 2022 (kWh):

    Production: 594.4 (528 predicted, 609.7 last year)

    Consumption: 343.3

    Import: 103(19d, 84n)

    Export: 354 (126 last year) - away three weeks

    Best day: 10th: 28.6

    Worst day: 30th: 8.0

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

    Sorry only saw this post now. Yes nice to hit over the mw for month considering was quite cloudy for lots of it. Two inverters - 6kw solis 5g hybrid and 2.5kw goodwe standard single string inverter. Solis has 6.98kwp of ground mounted panels and goodwe has 2.88kwp DC on roof

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

    Is it just me or last year's August was absolutely brutal?

    This year might even hit 900kwh

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

    I'm nearly beating my July figures and we've 2 days left to go - and july was decent enough. Right now I'm on 547 units and I did 559 in July.

    Current Actual compared to forecast is 121% for August, and 2 very sunny days to come!!

  • Registered Users Posts: 2,084 ✭✭✭allinthehead

    Nice, what size?


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

    Well the numbers are already in - August is my best month beating May's numbers.

    May had higher highs (cooler panels) but August just had more days above 20Kwh for me. Notably - my import numbers are up this month (from 28Kwh to 102Kwh) but I expect that July holidays meant i just used less power that month compared to this month.

    tldr; From here and into winter - my need to use Night rate and Load shifting will increase - the days are drawing in and sunshine is NOT getting over the trees early enough to fill battery or heat water anymore - so i need to boost with the Eddi more. My oil tank has been idle for months thankfully - and i dont expect to need to fire it up until November - unless i find it cheaper to heat water during the day. Getting a fill today to top me up before it gets crazy.

  • Registered Users Posts: 6,136 ✭✭✭championc

    Call a tree surgeon !!!

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

    Ahh the old "Can-o-petrol-and-zippo problem" I see - LOL

  • Moderators, Sports Moderators Posts: 19,027 Mod ✭✭✭✭slave1

    Too soon, still generating for a few hours......

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

    Public Profile active ads for slave1 (

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

    I have removed all South facing obstructions - and felled a West facing obstacle. Im keeping the remaining ones topped... but the East Facing early morning trees are loved by the missus. I might convince her to top a few next year. I know which ones are in the way after observing for a year. :)

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

    6.2Kwp Monaghan ( August last year was 511 kWh )

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

    6.84kWp south facing, Roscommon. 4.8kw battery.

    August 2022

    869kWh generated (660 forecast) ,😁

    (79kWh to Eddi - mostly the Eddi heating water all month)

    (90.3% of total consumption, self produced)

    Total consumption 710kWh. 218kWh discharged from battery. 291kWh exported

    69kWh imported (no day/night meter, but bulk imported during night, early morning)

    44.0kWh generated best day (9th & 11th Aug)

    10.7kWh generated worst day (15th Aug)

  • Moderators, Sports Moderators Posts: 19,027 Mod ✭✭✭✭slave1


    Array 1: 4.1kWp SSW with Winter Shading, 3.3kWp NNE

    Array 2: 2.73kWp SE, 0.91kWp S, 3.64kWp SW (all neighbourhood shading/optimised)

    561kW imported (two EV household)

    1,146.4kWh Generated

    938.4kWh consumed

    320kWh diverted to Eddi

    376.9kWh diverted to Zappi

    Approx 2427.2kms of range into the EVs

    Highest was 55.5kWh

    Lowest was 14.5kWh

    80% self sufficient (excluding EVs)

    63% 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, €95.45

    Great month but skewed by install of Array #2 mid month on the last day of the glorious weather. Most happy with the PV into EV rate. Milestones in the month include passing the €1k mark in electricity cost saving since inception, passing 10MW in production since inception, breaking the 50kWh daily generation and passing the 1MW in monthly production.

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

    Public Profile active ads for slave1 (

  • Registered Users Posts: 15,193 ✭✭✭✭Ha Long Bay

    799KW generated for August with 141KW to the Eddi. 7.2KW South facing in Dublin. Best day was the 8th generated 38KW.,

  • Registered Users Posts: 2,005 ✭✭✭jkforde

    Mid East Galway, 6.7kwp, 20 q-cell panels, SW azimuth, 45° pitch

    Generation 908, 44% self use (another battery!?)

    Import 101

    Diverted Eddi 106, Zappi 144

    Very happy with system, even though self use is relatively low this month, but with some deemed CEG by end of year.. 🌞🌞

    🌦️ 6.7kwp, 45°, SSW, mid-Galway 🌦️

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

    August Stats

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

    Generation – 766.5kWh

    Export – 78.2kWh

    Import – 77.3kWh

    Best day – 10th, 41.2kWh

    Worst day - 15th, 5.6kWh

    Days with less than 1kWh purchased - 26.

  • Registered Users Posts: 2,084 ✭✭✭allinthehead

    3.2 kwp SE, .8 kwp NW. Only had 2.4 kwp from the 2nd to the 7th, then the full 4 kwp from the 7th.

    478 kwh produced. Best was 26.6 kwh, worst was 12.

    Only 30% self use.

    Two more 400w panels going on to my boundary fence vertically on Friday orientated west as I have two spare ports on my microinverters, so why not.


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

    4.8kW EW Dublin. 10kWh DIY battery

    August 2022 (kWh):

    Production: 607.8 (462 predicted, 446.5 last year)

    Consumption: 866.2

    Import: 303(78d, 225n)

    Export: 19.8 (37.4 last year)

    Best day: 8th: 28

    Worst day: 16th: 9

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

    7kWp South, 20kWh battery

    Best day – 8/9/10/11/12/21st, 42kWh

    Worst day - 26th, 13.8kWh

    Cracking August this year compared to last year's 643kwh

    Days with less than 1kWh purchased - all of them

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

    Been a good month. Two installations. Installation1 is the original one (1.52Kwp East/3.8Kwp West) in south dublin.

    Installation 2 is the 2.3Kwp south facing one the shed. Only operational since Aug 5th or so. Still did an impressive 211Kwhr which at ~€0.30/unit, that's a nice €60 assuming I was to use it all myself (which I know I didn't and a lot of it got FIT exported). I'm on deemed export, so it's much to a muchness for me.

    Some milestones: Broke €1,000 in overall savings since I put the system in, in late Oct '21, which would put me on track for a 7-8 year payback for everything (installation 1 only)

    For those of you who are interested, south Dublin had a pretty good month compared to forecast.

    I had better/higher months of course (May & June) but August felt relentless with day after day of 20-25Kwhr. Smashing.

  • Registered Users Posts: 760 ✭✭✭Bif

    Great month. Thought I might get my first MW but no…6.9kwp South facing.

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

    4.83kWp south facing, Dublin Fingal

    635kWh generated (best month since install)

    207kWh exported (67% solar self-consumption)

    38kWh imported (13kWh day, 25kWh night)

    31.1kWh generated best day (10th Aug)

    8kWh generated worst day (16th Aug)

  • Registered Users Posts: 228 ✭✭curioustony

    You folks are quick off the mark!

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


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

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

    South Roscommon, 8.16Kwp, facing 210° at 35°

    Total generation 1084kWh

    Consumed 583kWh

    Energy from Grid 91kWh

    Energy to Grid 347kWh

    To the Eddi 155.9kWh

    To the Zappi 260kWh (approx. as we had a couple of night charges due to a few trips)

    To the Battery 154kWh

    Best day 10th with 53kWh

    Worst day 1st with 13.4kWh, only 2 days where it dipped below 20kWh and 4 straight days in the 50's.

    Was our best month to date, really was a great August, breaking the MWh.

    Running about 68% self use as we had a good few days away when the weather was good.

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