Solar PV Performance Thread - Post your monthly output

redmagic68

Generated -- 794.47 kwh

Grid Import -- 146.06 kwh

Grid Export FIT -- 239.97 kwh

Best Day 8th 41.75 kwh 

worst day 14th 3.84 kwh. 

drop of 235 kwh from last month and 55kwh from projections.

Bad month.

Bring on the rain powered solar panels.

garbanzo

Figures for the month of July from a 4Kw system on an even East : West split. Based in South Dublin. No battery. 5kW inverter:

• Total generated: 415 kWH
• Highest day:  8th  20.66 kWH
• Lowest day: 23rd 5.28 kWH

As anyone living in Ireland will know, July was an absolute shocker weather-wise so on the one hand I’m kinda surprised we achieved as much as we did. We were 94 kWH down though on what we achieved in both May and June. Still, we were better than April which got us 340kWH ! 

Will have the full year’s data from my App around 7th August. 

g

ECO_Mental

758 kWh generated on my 6.1kW south facing system

Used 61% of it which is alright for me

Total Energy consumed in the month was 1,325 kWh

A little over what was estimated on the PVGIS-SARAH estimate

Ha Long Bay

7.2kwp south facing in north Dublin. 694kWh generated and best day was 8th July generating 34.3 kWh.

63 of the imported kWh was used during free time on Saturday with Bord Gais where I use it to charge the batteries.

DownByTheGarden

https://www.boards.ie/discussion/comment/120927591#Comment_120927591

Is your battery import total not included in your generation total. eg your actual generation is 694 - 63 = 631kwh . Thats how mine works in the solis reports anyway. Its a right pain trying to work out real generation in the winter with all the battery charging.

THE ALM

Considering what felt like a miserable month we faired ok.

South Roscommon, 8.16Kwp, facing 210° at 35°, 9.6kWh battery

Total generation 852.84kWh (prediction at 820kWh, last year 902.1kWh)

Consumed 712.57kWh (84% self use).

Energy from Grid 0kWh

Energy to Grid 134kWh

To the Eddi 131.8kWh

To the Zappi 274.8Wh (all from solar)

To the Battery 140.86kWh

From the Battery 131.25kWh

Best day 8th with 41.9kWh

Worst day 18th with 8.4kWh

Energy exported would have generated €24.12 at Energia FIT rate if on a smart meter, we are D/N.

Fingleberries

2.1kwp system (south facingsystem, North Dublin), only live since 7 July

July figure was 103 kWh.

Grid charging the batteries has been doing a lot of the heavy lifting for peak shaving last month. Hoping for a better weather and solar PV in August.

celtic_oz

6.2Kwp Monaghan

had 769 kWh last year 🤔

rgfuller

21st Month

Dublin - Lucan - July 23 - 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: 684kWh (429kWh self use (inc. battery), 255kWh to grid)

Best Day: July 8th - 35.6kWh

Worst Day: July 14th - 7.4kWh

Total Consumption: 459kWh (91% Solar: 9% Grid Import (43kWh))

Milestones & Info:

Last Year July 2022 :: Generation 775kWh, Consumption 352kWh

134kWh to Eddi for July

No import on 16 days

Passed 10MWh since install (Oct'21), and 4MWh for 2023

2023 - Monthly PV Savings :: Expected FIT €61.20 + Money Saved on Energy from PV :: €98.67 :: Total €159.87 for July. (FIT@0.24c/kWh, AvgUnitCstSaving@0.23c/kWh)

2023 - Annual PV Saving progress :: (Jan 49.41, Feb 87.25, Mar 92.66, Apr 138.62, May 202.72, June 201.62, July 159.87 ) = €932.15

garo

https://www.boards.ie/discussion/comment/120805878#Comment_120805878

Yes to charging an EV. But most of the import is due the inverter and battery reacting slowly to power demand.

garo

4.8kW EW Dublin. 20kWh DIY battery

August2023 (kWh):

Production: 468.7 (462 predicted, 583 last year)

Consumption: 704.3

Import: 249 (36d, 213n)

Export: 13.4

Best day: 20th: 21.8

Worst day: 18th: 3.0

Jonathan

4.83kWp south facing, Dublin Fingal, 10kWh battery

July Stats

530kWh generated (vs 580kWh for July 22)

90kWh exported (83% solar self-consumption)

44kWh imported (5kWh day, 39kWh night)

26.2kWh generated best day (8th July)

5kWh generated worst day (14th July)

0kWh natural gas heating

August Stats

520kWh generated (vs 635kWh for August 22)

57kWh exported (89% solar self-consumption)

73kWh imported (7kWh day, 66kWh night)

25.1kWh generated best day (19th August)

1.5kWh generated worst day (18th August)

0kWh natural gas heating

irishchris

August 2023

Generated: 943.4 kwh

Import: 8.8 kwh - €1.06

Export: 452 kwh - (FIT - €113)

2011

6.6 kWp, East / West split, Co. Wicklow, no battery.

August 2023 stats:

• Generated: 517 kWh
• Exported: 398 kWh
• Imported: 145 kWh

A disappointing month.... 😒

micks_address

August 2023 - 7kwp - 4 south east, 3 north west - North Dublin

Generated: 657 kwh

Export: 196 kwh

Import: 121 kwh (night time batter charging, car, some day shower use)

19th of August power out all day - ran EPS from battery, internet, tv, low wattage kettle, coffee machine - need to sort fireman switch so can have solar generation also in power cut

zoom_cool

August 2023 - 4.8Kwp S/W North Meath

Generated: 567 kwh

Export: 206 kwh

Import: 83 kwh

jkforde

August 2023

most of the 83kwh import was for early morning Eddi boost using night rate (Flogas 14c, I miss Energia 9c!)

fuse

5.67kWp E/W split, South Dublin

5kWh battery

August

533kWh generated

191kWh exported (~€35 FIT, 82% solar self-consumption)

107kWh imported

197kWh used from battery

143.8kWh used by Eddi

27.5kWh generated best day (19th August)

2.7kWh generated worst day (18th August)

0kWh natural gas heating

creativedrinker

2.46kw south facing in north Dublin

242kw for august

rgfuller

22nd Month

Dublin - Lucan - August 23 - 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: 624kWh (309kWh self use (inc. battery), 315kWh to grid)

Best Day: August 20th - 31.5kWh

Worst Day: August 18th - 2.8kWh

Total Consumption: 345kWh (88% Solar: 12% Grid Import (40kWh))

Milestones & Info:

Last Year August 2022 :: Generation 797kWh, Consumption 413kWh

85kWh to Eddi for August

No import on 17 days

2023 - Monthly PV Savings :: Expected FIT €75.60 + Money Saved on Energy from PV :: €70.15 :: Total €145.75 for August. (FIT@0.24c/kWh, AvgUnitCstSaving@0.23c/kWh)

2023 - Annual PV Saving progress :: (Jan 49.41, Feb 87.25, Mar 92.66, Apr 138.62, May 202.72, Jun 201.62, Jul 159.87, Aug 145.75 ) = €1077.90

curioustony

Not my worst August, and not the best

Two month buy/sell

Estimated bill (excluding PSO) -- with the updates hitting in Sept/Oct for comparison

cc

283kWh off 3.2kW Cork (2.0kW SW, 1.2kW NE). Amazing to think got 392kWh in May and thought best was yet to come..

championc

August Stats

Generation – 331.95 kWh
4.0kWp N   - 300.6 kWh
Consumed   - 284.87 kWh
Import     – 8.14 kWh
Export     – 121.97 kWh
Eddi       - 36.4 kWh
Zappi      - 122.7 kWh

Meter Readings 06914 (01184 Day - up 1 / 05729 Night - up 0) - Gas 7120(up 17)

Totals so far:

2.7kWp (S) + 1.2kWp on shed, 20kWh battery, 22 deg Slope, Sth Dublin

Month    |   2020 |   2021 |   2022 |   2023 |
---------+--------+--------+--------+--------+
January  |     75 |     56 |     81 |     76 |
February |    122 |    142 |    111 |    134 |
March    |    200 |    269 |    370 |    245 |
April    |    279 |    373 |    372 |    320 |
May      |    396 |    430 |    445 |    449 |
June     |    264 |    425 |    425 |    341 |
July     |    261 |    387 |    407 |    341 |
August   |    254 |    264 |    435 |    332 |
September|    268 |    248 |    242 |        |
October  |    151 |    185 |    221 |        |
November |     90 |     78 |     96 |        |
December |     56 |     52 |     55 |        |
---------+--------+--------+--------+--------+
Total    |   2.41 |   2.90 |   3.26 |   2.23 |

.

4.0 (N) ** NEW **

Month    |   2023 |
---------+--------+
January  |        |
February |        |
March    |        |
April    |        |
May      |        |
June     |    441 |
July     |    385 |
August   |    301 |
September|        |
October  |        |
November |        |
December |        |
---------+--------+
Total    |   1.12 |

bullit_dodger

6.5Kwp split 2.3Kwp East & 4.2Kwp West. South Dublin city.

12 months ago I had 3 less panels than this year (I had 5.3Kwp last year), so the fact that I didn't match last years generation with 3 extra panels is a testament to how good Aug'22 was.....or how poor Aug'23 was, or a bit of both :-)

Eye

Hi All,

New install near the end of June this year

My Setup:

7.74kW (18x 430w panels) 9 panels South / 9 panels West in North Waterford, slope I think is around 40°, 5kW Huawei Inverter with No Battery currently (hoping to add one down the line)

July was poor for me (compared to predictions), not just because of the bad weather but also had a few teething issues...no generation on 1 string for about 4 days due to loose connections and some intermittent issues with the inverter dropping down to about 100w even then weather was great, but think we have all those sorted so August was pretty much where I expected it would be

July

Predictions 841/811 kWh

Total Generation 721.29 kWh

Total Consumption 824.20 kWh (58.05% Solar / 41.95% Grid)

PV Consumed 478.42 kWh

Imported from Grid 345.78 kWh

Exported to Grid 242.87 kWh

Eddi Usage 51.5 kWh

Wallbox EV Charger 137.46 kWh (118.13 Solar / 19.33 Grid import)

Best Day 9th July - 41.75 kWh

Worst Day 26th July - 9.08 kWh

August

Predictions 758/763 kWh

Total Generation 724.30 kWh

Total Consumption 777.62 kWh (56.28% Solar / 43.72% Grid)

PV Consumed 437.66 kWh

Imported from Grid 339.96 kWh

Exported to Grid 286.64 kWh

Eddi Usage 44.6 kWh

Wallbox EV Charger 115.74 kWh (105.59 Solar / 10.15 Grid import)

Best Day 6th August - 40.24 kWh

Worst Day 18th August - 6.87 kWh

John mac

August 2023 ,

7.4kW east west split Mayo

Total generated _______ 585 kWh

best day 5th Aug ______33.4

worst day 18th Aug_____10.7

exported ____________144.1

Eddi_________________73.3

Grid import.___________54.5 (messing with battery )

garbanzo

Figures are in for the month of August from a 4Kw system on an even East : West split. Based in South Dublin. No battery. 5kW inverter:

- Total generated: 371 kWh

- Highest day: 20th  18.97 kWh

- Lowest day: 18th 2.01kWh

So, 44kWh down on the month of July. The slow inexorable slide to the winter continues. I have written up my experience since going solar and have a year’s worth of data now. 

We started the journey in April 2022. Paid the 25% deposit on the install. Panels were fitted in June '22. Inverter installation, connection and final commissioning was done in July so we have been live and generating since then. We paid €5,100 nett after the €2,400 grant. The system is 4 kWH on an even East : West split. A 5 kW hybrid inverter with no battery, Eddi or Zappi ! 

There were some teething probs with the app which had to be reinstalled, so my data only started from 8 August 2022. Annual generation from 8 August 2022 to 7 August 2023 was 3,288kWh. The installer’s proposal predicted an annual yield of between 3,600 – 3,900 kWH but we are a little shy of that. Salespeople …eh ! 

Electricity Usage

The financials have been difficult to calculate given the major spike in energy costs and inclusion of the various government €200 support payments. We also changed provider, to SSE in August and had a Smart Meter installed in September. It is now active but we have remained on a 24 hour tariff. SSE also reduced bills with a once-off payment of €35 last May. 

To try and get a useful benchmark on usage I compared meter readings from previous old bills in the two years between 1 October 2019 and 01 October 2021. I also registered and looked at data on the esbnetworks.ie site. According to all of that that I calculated an average usage rate of 5,089 kWH per annum. That’s on the high side I know and we have no electric cars or hybrids. 

In the 12 months since the installation we used 3,318 kWH of electricity. That’s 1,771 kWH less than my pre-panel usage. That works out as an annual saving of €566 on electricity costs currently at €0.32 per unit.  So, I estimate that allowing for monthly fluctuations circa 35% of the electricity we use over a full year is generated from our roof 😊 

Clean Export Guarantee

We get €0.24c back from SSE as a credit on our bill under the Clean Export Guarantee (CEG). In June we received €157.86 back from SSE for 657 units exported to the grid for the 7 month period 1 October 2022 to 30 April 2023. SSE gave a very detailed breakdown of how this was calculated.

We also got two CEG payments of around €9.29 each on our December and January bills. There was no back-up from SSE for how these were calculated but they are equivalent to around 38 kWHs each. There may have been some delay getting the NC1 Form registered with ESB Networks hence the figures being a little vaguer. Also, we were probably on deemed export for two months as we only had the Smart Meter installed in September.  

So, the total received under the CEG from, September to end April 2023 was €176.44 for 733 kWHs. With peak generation in May – August our Smart Meter indicates a total export figure today of just over 1,600kWH. So, that’s 867 kWHs at €0.24 = €208.08 we still have to be paid for

That equals €384.52 in CEG over 12 months for circa 1560 kWHs sent back to the grid which is around half of what I generate. I know this potentially creates an income tax liability as it is greater than €200. 

General Observations

- It seems that half of the electricity we generated, we consumed. The other half we exported. That was a surprise. 

- The calculations I have done here are not forensic. I have not factored in things like depreciation. But, they indicate a ballpark reduction in our annual electricity bill of €566. Taken with the annual CEG of €384 the total financial gain is therefore in the region of €950 over 12 months 😊

- Based on these figures I estimate a payback of just over 5 years. We are happy with that and beyond that we will continue to make savings 

- We now have a BER of B2 in a house built in 1948 😊 😊

- The best day ever generated 25.56 kWH. That was during the fab June weather. So that seems to be the maximum capacity of the system

- The worst day was in December when it generated 0.76kWH. Low sun, short days, slim pickings

- Three good days in Summer will give you more than the month of December. November to February are predictably grim months for solar. And obviously that is when you are using the most energy.  

- Amazing to think you will still send energy back to the grid in November, December and January. Not huge amounts but you still send energy back then and every little bit helps when you have the CEG. 

We’ve changed some of our habits. We time dishwashers, washers, dryers etc. to come on in the middle of the day now. We are 100% happy we did this. It is the right thing to do for lots of reasons if you can afford it. In hindsight, we might have put more panels up on the roof, but we only had a certain budget. The system is future-proofed to allow us add more panels so we may do so in time. 

Sin a bhfuil. Hope you enjoyed reading this and that our experience helps in making a decision. 

g

eclipsechaser

1038kWh generated during August. 10.4kWp system with 6kW solis hybrid inverter. Facing south in south Dublin.

Dothehustle

4.7kWp system 3.4kWp east 1.3kWp west only installed on the 17th of august

223.60kWh for the two weeks

Best day 24th of aug with 22.3kWp

paulbok

6.84kWp south facing, Roscommon. 4.8kw battery.

Aug 2023

735kWh generation

Total consumption 698kWh.

121.8kWh to Eddi (mostly using immersion for HW during the summer, that's another 11.5l of oil saved)

175 kWh exported

80kWh imported (no day/night meter)

37kWh generated best day (5th)

11kWh generated worst day (18th)

Pretty much a better month in every stat than July.