Solar PV Performance Thread - Post your monthly output

ted1 · 05-05-2026 09:32AM

the last day wasn’t great. So

Just shy of the 800kwh. I guess the people with low consumption numbers don’t have an EV or kids in the house, our consumption is generally over 1MWh per month

bullit_dodger · 05-05-2026 02:16PM

I think it would help a lot if people can add where you are along with the config they are running. Not to call out Ted above, but it's hard to tell if 789kWh is good or not as we don't know if he has 6kwp of panels or 10kwp of panels, etc

Are they all south facing? Maybe they are East/West. Is he in Killarney or Kilkenny etc.

Makes it a lot easier to spot performance issues for people if they can see someone with a similar system down the road getting a totally different number. Thanks

(800kwh for April is pretty good)

hammerdub · 06-05-2026 11:07AM

April.

Production : 760.77

Consumption: 218.83

From solar: 120.39

From grid: 98.44.

55% From solar.

20 panels Meath.

ted1 · 07-05-2026 02:50PM

https://www.boards.ie/discussion/comment/124445622#Comment_124445622

I usually do five the details.
South Dublin , 6.3 kwp system

6 panels SE, 8 panels SW

bullit_dodger · 07-05-2026 05:07PM

https://www.boards.ie/discussion/comment/124450597#Comment_124450597

Nice one, in that case with 6.3Kwp….that's a pretty sweet result. For context, I just beat you with 864Kwh but I was working off a total of 8.8Kwp…

magicbastarder · 07-05-2026 10:26PM

i've a 7,9kW system but possibly unusual in that i have it spread across three aspects?

curioustony · 23-05-2026 10:25PM

Nearly forgot

This April on the left, April 2025 on the right

magicbastarder · 31-05-2026 08:10PM

945 for the month. 7.9kW system with three aspects in Dublin.

yellow fort · 31-05-2026 08:34PM

914 for the month 7.9 kw 13 panels SE

5 panels SW north Roscommon

celtic_oz · 31-05-2026 10:04PM

6.2 kWp Monaghan

Not a great May

KevIRL · 31-05-2026 10:46PM

1.025 MWh.

8.8Kwp south west facing Waterford. No previous year comparison

kaymin · 31-05-2026 11:58PM

768 kWh generated

5.4 kWp system

Kildare, south- facing

Newly installed since January so no comparison

MacDanger · 01-06-2026 01:30AM

903kWh, down 17% on May 2025

bullit_dodger · 01-06-2026 02:05AM

Pretty solid (106% of PvGIS) - like everyone, I'm 16% down on last year's epic May. <Will we see it's like again?>

6.5kwp in South Dublin City.

Shed chipped in with 277kWh, bringing the total up to 992Kwh. Sadly didn't break the 1mWh…..

discostu1 · 01-06-2026 03:22AM

May 2025, 1047, kwh

May 2026, 811kwh , 5.5kwp 15 panels South Facing, West Side of Cork City. About 22% down on the epic that was May 2025

TimHorton · 01-06-2026 09:38AM

May 2026 1332 kWh - Midlands - No previous data

1292 kWh - 9.8 kWp - 22 x South Facing Solis 5k Inverter

40 kWh - .88 kWp - 2 x South Facing Ecoflow 800w MicroInverter (10 days only at the end of the month)

rgfuller · 01-06-2026 09:39AM

55th Month

Dublin - Lucan - May 26 - 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: 784kWh (439kWh self use (inc. battery), 345kWh to grid)

Best Day: May 24th - 39.0kWh

Worst Day: May 11th - 13.0kWh

Total Consumption: 505kWh (86% Solar: 14% Grid Import (75kWh))

Milestones & Info:

May 2025 :: Generation 901kWh, Consumption 572kWh
May 2024 :: Generation 676kWh, Consumption 506kWh
May 2023 :: Generation 878kWh, Consumption 439kWh
May 2022 :: Generation 796kWh, Consumption 414kWh

89kWh to Eddi for May. Passed 24MWh since install. 6 Days with No Import.

2026 - Monthly PV Savings :: Expected FIT €63.82 + Money Saved on Energy from PV €122.92 :: Total €186.74 for May. (FIT@18.5c/kWh, AvgUnitCstSaving@0.28c/kWh)

2026 - Annual PV Saving progress :: (Jan 36.48, Feb 41.89, Mar 119.04, Apr 165.94, May 186.74) = €550.09 Total saved/earned due to PV in 2026

isitamonster · 01-06-2026 10:00AM

May 2026: 896 kWh from a 8.02kWp system in Clare.
Third highest month since install in Feb 2025, behind May 2025 (1.09 mWh) and April 2025 (912 kWh).

Record daily production 50.45 kWh on 24 May beating 21 May 2025 (50.12 kWh). I avoided clipping on the new record and benefited by around 2.7 kWh whereas the previous high was clipped for almost 4 hours.

curioustony · 01-06-2026 10:52AM

I put this May in the same category as 2024. Shame Pinergy plan is gone.

Costs by hour summed in May. 2025 on the left. I like forced export.

PV by day in May, 2026 on the right

paulos · 01-06-2026 11:01AM

594.9 kwh generated for May 2026

4.7kwp 11 panel system with 8 s and 3 w.

675 kwh last year

John mac · 01-06-2026 11:39AM

7.4 east west split Mayo

total for May 2026 786kWh

best day 27th 40.99 kWh

worst day 21st 11.2 kWh

May 2025 958

May 2024 678

May 2023 881

Jo Satan · 01-06-2026 04:50PM

8.8kwp split SW/NE Wicklow

ECO_Mental · 01-06-2026 05:40PM

https://www.boards.ie/discussion/comment/124515866#Comment_124515866

Have you done your own app to analyse your monthly data to see which is the best tariff... Good job of you have.. Or what app are you using. I was planning to do something similar myself and just started it before I went on holidays.

kevinr7213 · 01-06-2026 07:19PM

5.6kwp e/w cork

curioustony · 01-06-2026 07:34PM

https://www.boards.ie/discussion/comment/124516669#Comment_124516669

I have. It's a long time in the android app store. 'Eco power optimiser'. Working on a new UI. Was stuck insulating the attic for the winter. Feedback was great functionally, crap UX. Still in alpha testing, but Claude is quick. Open source:

https://github.com/Tonyslogic/comparetout

ECO_Mental · 01-06-2026 08:09PM

@curioustony that's cool, I might have a look at it when I get back from me holliers in 2 weeks..I have the early stages of a local python program on my laptop... Pull my sensor data down from HA then do this complex analysis anytime I want to make sure I'm on the best tariff etc. look into dynamic tariffs as well. (Even though I know they are ****!) Totally vibe coded with Gemini 🫣