Solar PV Performance Thread - Post your monthly output

championc · 11-07-2025 01:32PM

June Stats - Sth Dublin

3.9kWp S – 356.6 kWh (inverter issue with midday generation from 16 May →)
4.0kWp N - 430.8 kWh
Eddi - 19.2 kWh
Zappi - 115.6 kWh

Meter Readings 18716 (H+|1 18112 - up 1061 / H+|2 526 - up 1 / H+|3 76 - up 0 / H- 10835 - up 963)

Pinergy - Imported 1061 @ 5c & 1 @ 37c / Exported 963 @ 25c - Cost €187.33r

Vaillant Heatpump - Consumed 38.3kWh / Yield 210.1kWh (OpenEnergyMonitor) - COP 5.49

Totals so far:

2.7kWp main roof + 1.2kWp on shed (S)

Month    |   2020 |   2021 |   2022 |   2023 |   2024 |   2025 |

---------+--------+--------+--------+--------+--------+--------+

January  |     75 |     56 |     81 |     76 |     71 |     82 |

February |    122 |    142 |    111 |    134 |    144 |    118 |

March    |    200 |    269 |    370 |    245 |    237 |    319 |

April    |    279 |    373 |    372 |    320 |    366 |    377 |

May      |    396 |    430 |    445 |    449 |    407 |    481 |

June     |    264 |    425 |    425 |    341 |    423 |    357 |

July     |    261 |    387 |    407 |    341 |    401 |        |

August   |    254 |    264 |    435 |    332 |    424 |        |

September|    268 |    248 |    242 |    279 |    230 |        |

October  |    151 |    185 |    221 |    173 |    216 |        |

November |     90 |     78 |     96 |     89 |     79 |        |

December |     56 |     52 |     55 |     44 |     49 |        |

---------+--------+--------+--------+--------+--------+--------+

Total    |   2.41 |   2.90 |   3.26 |   2.80 |   3.05 |   1.73 |

4.0kWp on main roof (N)

Month    |   2023 |   2024 |   2025 |

---------+--------+--------+--------+

January  |        |     27 |     25 |

February |        |     65 |     41 |

March    |        |    135 |    152 |

April    |        |    265 |    265 |

May      |        |    342 |    474 |

June     |    441 |    427 |    431 |

July     |    385 |    373 |        |

August   |    301 |    330 |        |

September|    163 |    143 |        |

October  |     83 |     84 |        |

November |     38 |     33 |        |

December |     24 |     20 |        |

---------+--------+--------+--------+

Total    |   1.61 |   2.24 |   1.39 |

ELM327 · 30-07-2025 10:25AM

Is it just me or is july looking worse than June which was worse than may? Make it make sense!

graememk · 30-07-2025 10:35AM

https://www.boards.ie/discussion/comment/123682490#Comment_123682490

Yes it's been an extremely cloudy 2 months.

I've been out in it trying to get weather windows to get silage etc done,

And may was extraordinary good.

magicbastarder · 30-07-2025 10:40AM

i've had the full set of panels up and running since the 2nd of this month; 18 panels, currently at 826kWh for the month.

JohnySwan · 30-07-2025 01:31PM

I'm about 10% up on last July in Cork, on course to overtake June too.

big_show · 31-07-2025 01:53PM

Just broke 1MWh for the month, previous 2 July's were in the 800's. Definitely didn't "feel" like a sunny July. Based in the NW.

Soarer · 31-07-2025 06:09PM

First full proper month for me.

21 panel array. 13 south facing, 8 north facing. 9.66kWp. Cork City.

1.09MWh produced and still pulling 3.8kW at 18:10 in the evening.

celtic_oz · 31-07-2025 10:07PM

Monaghan 6.2Kwp

not far off '22

Exiled Rebel · 31-07-2025 11:22PM

7.79kWp South facing, Co. Waterford, no battery.

Ground mount has 12 panels, 7 on the shed.

A strange month for me. Only the shed panels were working from 1st to 4th. Issue resolved on 4th. In or around the 10th I subsequently adjusted for the first time the ground mount from 50 degrees to the optimal 14 degrees for July.

As a result I smashed last year's July generated figure despite output being limited for the first 4 days. If I pro rata the missing production the generated figure would be 950kWh, close to 175kWh more than July 2024 or the equivalent of an extra €35 in FIT.

A net value of €85 in FIT generated this month.

July 2025

July 2024

A record month and a record day when I generated 49.8kWh on one particular day.

I reckon I could have generated 1MWh if I had all 19 panels working for the full month at the optimal angle.

bullit_dodger · 31-07-2025 11:42PM

Decent enough month for me in South Dublin City with 6.5kWp split East/West.

6% up on last year and 6% over PVGIS. What's not to like!

Month was going great guns for the 1st half, and then it's sort of tapered off. Still, it set an all time high for July.

The Shed (2.3Kwp south) chipped in 261kwh, so a total of 905Kwh for the month. I'll take it, esp when I consider I get ~150kwh or so in December!

omeara1113 · 01-08-2025 06:17AM

615 from a 5.22 E.W Facing system happy enough

CivilEx · 01-08-2025 08:41AM

July - 7.0kWp ground mounted south facing - East Mayo, total of 859kWh.

ECO_Mental · 01-08-2025 09:49AM

813 kWh about 100 more than last year (6.1kWp south facing)

curioustony · 01-08-2025 04:16PM

Solid July, not as good as '21

Still stashing cash for winter, despite feeding the car

Battery getting a good workout too

discostu1 · 01-08-2025 07:44PM

841kwh, from a 5.5kwp South facing ,West Side of Cork City....July 24 was 761kwh

J_R · 02-08-2025 09:40AM

4.8Kw. July 2025 South facing, Sligo town (669.80 July 2024)

GhostInTheRuins · 02-08-2025 05:47PM

542 kWh on south south-east 4.4kWp.

Not a bad month overall but May was so good that I was expecting a bit more in June and July.

Still, €55 credit which should cover the next two month’s gas bills so can’t complain.

ionapaul · 06-08-2025 08:59AM

For July:

799kWh generated - 6.72kW system facing ESE in South Dublin.

304kWh consumed.

Generation similar to July 2024 (789kWh) and up a bit on June 2023 (756kWh).

In July, self-used 26% of electricity generated and fed in the other 592kWh (no battery).

Since initial installation on March 7 2023, a total of 19.71MWh generated, 13.75MWh fed to grid, with a self-use ratio of approximately 30.3%.

championc · 07-08-2025 03:17PM

Self created issue on South string, since 16 May, finally corrected mid-month

July Stats - Sth Dublin

3.9kWp S – 276.3 kWh
4.0kWp N - 398.8 kWh
Eddi - 15.9 kWh
Zappi - 204.5 kWh

Meter Readings 19887 (H+|1 19279 - up 1167 / H+|2 530 - up 4 / H+|3 78 - up 2 / H- 11850 - up 1015)

Pinergy - Imported 1166 @ 5c & 6 @ 37c / Exported 1015 @ 25c - Cost €193.23r

Vaillant Heatpump - Consumed 13.5kWh / Yield 41.9kWh (OpenEnergyMonitor) - COP 3.10 / SCOP 4.20

Totals so far:

2.7kWp main roof + 1.2kWp on shed (S)



Month    |   2020 |   2021 |   2022 |   2023 |   2024 |   2025 |

---------+--------+--------+--------+--------+--------+--------+

January  |     75 |     56 |     81 |     76 |     71 |     82 |

February |    122 |    142 |    111 |    134 |    144 |    118 |

March    |    200 |    269 |    370 |    245 |    237 |    319 |

April    |    279 |    373 |    372 |    320 |    366 |    377 |

May      |    396 |    430 |    445 |    449 |    407 |    481 |

June     |    264 |    425 |    425 |    341 |    423 |    357 |

July     |    261 |    387 |    407 |    341 |    401 |    276 |

August   |    254 |    264 |    435 |    332 |    424 |        |

September|    268 |    248 |    242 |    279 |    230 |        |

October  |    151 |    185 |    221 |    173 |    216 |        |

November |     90 |     78 |     96 |     89 |     79 |        |

December |     56 |     52 |     55 |     44 |     49 |        |

---------+--------+--------+--------+--------+--------+--------+

Total    |   2.41 |   2.90 |   3.26 |   2.80 |   3.05 |   2.00 |

4.0kWp on main roof (N)

Month    |   2023 |   2024 |   2025 |

---------+--------+--------+--------+

January  |        |     27 |     25 |

February |        |     65 |     41 |

March    |        |    135 |    152 |

April    |        |    265 |    265 |

May      |        |    342 |    474 |

June     |    441 |    427 |    431 |

July     |    385 |    373 |    399 |

August   |    301 |    330 |        |

September|    163 |    143 |        |

October  |     83 |     84 |        |

November |     38 |     33 |        |

December |     24 |     20 |        |

---------+--------+--------+--------+

Total    |   1.61 |   2.24 |   1.79 |

John.G · 08-08-2025 09:34AM

https://www.boards.ie/discussion/comment/123704156#Comment_123704156

You seem to have had problems with the South string for some time, the 3.9kWp string outputted 2.41MWh in 2020 which is only 63% of the PVGIS number of 3.824Mwh but you did get 3.26MWh in 2022, 85.3% of the PVGIS number.

Your year 2024, North 4.0kWp string performed very well at 2.24MWh, 8.5%better than the PVGIS number of 2.064MWh. In general it seems that most installations here seem to exceed the PVGIS outputs by ~ 10%.

loyatemu · 08-08-2025 11:59AM

Greystones, 6.45kWp E/W

July: 805kW/h. +10% on 2024

23% self-consumed (with a 5kW/h battery that I charge off the EV rate every night).

rgfuller · 13-08-2025 09:08PM

45th Month

Dublin - Lucan - July 25 - 7.12kW 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: 720kWh (379kWh self use (inc. battery), 341kWh to grid)

Best Day: July 7th - 39.4kWh

Worst Day: July 21st - 5.1kWh

Total Consumption: 408kWh (90% Solar: 10% Grid Import (41kWh))

Milestones & Info:

July 2024 :: Generation 699kWh, Consumption 454kWh
July 2023 :: Generation 684kWh, Consumption 459kWh
July 2022 :: Generation 775kWh, Consumption 361kWh

66kWh to Eddi for July. 12 Days of no import. Passed 21MWh since install (26th Oct 2021) and 4MWh for 2025.

2025 - Monthly PV Savings :: Expected FIT €68.20 + Money Saved on Energy from PV €94.75 :: Total €162.95 for July. (FIT@20c/kWh, AvgUnitCstSaving@0.25c/kWh)*

2025 - Annual PV Saving progress :: (Jan 41.40, Feb 51.05, Mar 109.85, Apr 154.95, May 207.30, June 174.05, July 162.95) = €901.55 Total saved/earned due to PV in 2025

Exiled Rebel · 01-09-2025 12:19AM

Solid month. An additional 70kWh produced over and above August 2024's figure, somewhat offset by higher consumption this year. €51 net credit generated.

PVGIS predicted 820kWh so slightly off that.

7.79kWp south facing array, West Waterford.

Soarer · 01-09-2025 05:38AM

First August. Bigish battery and utilising arbitrage certainly boosted the grid export.

GhostInTheRuins · 01-09-2025 07:53AM

Decent month here. 515kWhs on south-east 4.4 kWp.

J_R · 01-09-2025 08:18AM

604.50 Kw, 4.8 Kw Panels 12 kw batteries, South facing Sligo town

CivilEx · 01-09-2025 09:30AM

August - 7.0kWp ground mounted south facing - East Mayo, total of 698kWh.

Sponsorgate · 01-09-2025 09:33AM

Installed on 18th August so 13 full days in total. Very happy with production in that time.

5.3kwp west & 4.4kwp East. 18kwh battery

loyatemu · 01-09-2025 09:42AM

709kWh, slightly up on last year

6.45kWp, E/W in Greystones.

rgfuller · 01-09-2025 10:44AM

46th Month

Dublin - Lucan - August 25 - 7.12kW 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: 695kWh (338kWh self use (inc. battery), 357kWh to grid)

Best Day: Aug 4th - 34.2kWh

Worst Day: Aug 20th - 9.2kWh

Total Consumption: 396kWh (84% Solar: 16% Grid Import (64kWh))

Milestones & Info:

Aug 2024 :: Generation 677kWh, Consumption 322kWh
Aug 2023 :: Generation 624kWh, Consumption 345kWh
Aug 2022 :: Generation 797kWh, Consumption 413kWh

75kWh to Eddi for Aug. 12 Days of no import.

2025 - Monthly PV Savings :: Expected FIT €71.40 + Money Saved on Energy from PV €84.50 :: Total €155.90 for Aug. (FIT@20c/kWh, AvgUnitCstSaving@0.25c/kWh)*

2025 - Annual PV Saving progress :: (Jan 41.40, Feb 51.05, Mar 109.85, Apr 154.95, May 207.30, Jun 174.05, Jul 162.95, Aug 155.90) = €1057.45 Total saved/earned due to PV in 2025

Solar PV Performance Thread - Post your monthly output

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