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Solar PV Performance Thread - Post your monthly output

championc

I think it would be very useful to post Solar PV monthly generation figures. Not only could it highlight a problem further down the road, but there many be many owners who are getting far less than they expected (or promised by an installer) and would welcome feedback from other owners.

Of course, there are so many factors involved. Your location in the country (or abroad for our international boardies), your array size, your array direction and the panels mounting angle.

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Geeyfds53573

irishchris wrote: »

I'm based in Galway. System is South West facing and is 2.88 Futura panels in a goodwe 2.5 inverter.
Doesn't really start producing until 11ish each day for to orientation but although was clear start to the month, last few days have been poor production. Attached the monthly outputs since it was installed mid october

Regional Galway had a good solar month so

irishchris

Winterman1234 wrote: »

Is it OK to ask what area of country your located, that's a great output figure for a 2.8kwp system

I'm based in Galway. System is South West facing and is 2.88 Futura panels in a goodwe 2.5 inverter.
Doesn't really start producing until 11ish each day for to orientation but although was clear start to the month, last few days have been poor production. Attached the monthly outputs since it was installed mid october

Alkers

Alkers wrote: »

2.52kWp south facing, Dublin city, installed Dec 12th.
December total 58.4kWh

January total 82.6kWh
Highest - Jan 9th (7.9kWh)
Lowest - Jan 20th (0.6kWh)

My previous figures have been questioned, do these look off?

Winterman1234

irishchris wrote: »

2.88kwp SW

January generation: 107.7kwh

Is it OK to ask what area of country your located, that's a great output figure for a 2.8kwp system

Winterman1234

Winterman1234 wrote: »

December Values, South East, 2.4kwp, Donegal

(Predicted Gen - 40kWh)

Actual Gen - 26kWh
Grid Consumption - 211kWh
Hot Water Eddi - 6.9kWh
Lowest Daily Gen on the 2nd- 0kWh
Highest Daily Gen on the 6th- 3.3kWh

January Values, South East facing, 2.4kwp,Donegal

(Predicted Gen - 50kWh)

Actual Gen - 52kWh
Grid Consumption - 197kWh
Hot Water Eddi - 17kWh
Export - 3.8kWh ( lost due to eddi response time, maintaining balance )
Lowest Daily Gen (4 different days) - 0.2kWh
Highest Daily Gen on the 19th - 4.4kWh

Mickeroo

July: 191.7kWh
August: 397.8kWh
September: 299.1kWh
October: 226.1kWh
November: 72.5kWh
December: 66.9kWh
January: 89.0kwh

3.7kWp S/SW facing

irishchris

2.88kwp SW

January generation: 107.7kwh

MAULBROOK

South East direction in north Wexford.
6.2kw Solar
5kw Solis inverter
7kw BYD Battery

January Total 158.3kw
Best day, Jan 23rd 14.7kw
Worst Day Jan 31st 0.7kw, today was ****
Exported 2.5kw
Imported 282.4kw
Monthly self use 80.23%

bod71

bod71 wrote: »

Dec Gen. 46kwh.

Jan Gen. 48kw
4kw SE/NW. Best day 4.6 Worst 0.1

graememk

graememk wrote: »

website Prediction for Jan : 73kwh, But id still think it will be in the 60's due to shading.

Parents Array - 5.6kwp, SE, No battery, HW divert, Donegal Low angle (15°).
Generation : 79.2kWh
Solar Use(ex divert) :61.5kWh (78%)
Divert : 7.3 kWh (9%)
Export :10.5 kWh (13.5%)
Beat the prediction, Nice. Prediction for Feb : 166.89

Mine - 7.2kwp, SW/NE 50:50 Low angle (12°), 10kwh BYO battery. Only went live on the 15th Jan
Generation : 58.3kWh
Solar Use(Directly) :37.6kWh (65%)
To Battery: 18.5kWh (32%)
Export : 2.1kWh (4%)

Prediction for Feb: 164
Using PVGIS-SARAH.
Notes going forwards:
Will need to setup monitoring to record kwh when diverting PV to car.
When working out payback will be taking a 12% loss on anything put into battery. (Measured using a CT when charging and discharging from grid)
Since solar install, I'm running at 96.4% Night rate, (Charging batteries from grid at night)

gman2k

2.56kw South facing in South KK
Jan 21: 69.4kwh
Best day was the 23/1 : 6.5kwh
Worst day was the 20/1 : 0.1kwh

Kurt_Godel.

6kW south-facing, South Wicklow

Jan total 171.4kW

Best day 23rd 16.1kW

Worst 20th 0.6kW

mun1

mun1 wrote: »

December 2020
3.7kw PV array

December generated 88 kwhr.

Total generated since mid april 2020 2.53 MWh

Jan 21 generated 120kWh

pjordan

Near Westport, 4.6 kw system, facing South.

December total generation: 83.5 kWh
Best day 7th Dec 6.6 kWh
Worst day 26th Dec: 0.2 kWh

MAULBROOK

worlds goodest teecher wrote: »

Ah I wasn't really all that serious about the saved money, that is just what the app told me that I saved. Just stating that I am up and running with eyes glued to the app. Yesterday was a poor day here anyway.

That bloody app took over my life for the first year.
I'm down to once a day now:)

worlds goodest teecher

slave1 wrote: »

Switch electricity provider

Ah I wasn't really all that serious about the saved money, that is just what the app told me that I saved. Just stating that I am up and running with eyes glued to the app. Yesterday was a poor day here anyway.

slave1

worlds goodest teecher wrote: »

First full day after insulation. Wasn't really a great day for it though. 3.2kWh system 1.81kWh generated. What should I do with the 41c that I saved?

Switch electricity provider

DrPhilG

worlds goodest teecher wrote: »

First full day after insulation. Wasn't really a great day for it though. 3.2kWh system 1.81kWh generated. What should I do with the 41c that I saved?

41c? Are you paying 22c+ per unit?

worlds goodest teecher

First full day after insulation. Wasn't really a great day for it though. 3.2kWh system 1.81kWh generated. What should I do with the 41c that I saved?

Rzeznik

Near Drogheda, West facing, 2,48kW

Generation so far:
Aug'20: 220,4kWh
Sep'20: 186,4kWh
Oct'20: 110,4kWh
Nov'20: 45kWh

And

Dec'20: 28,1kWh

Alkers

championc wrote: »

Maybe take this over onto the Solar PV Hints, Tips and Troubleshooting thread. Have you access to data each day ? I'd expect your output on a clear day at solar noon to be around 1.5kW. My peak continuous generation on a 22° roof slope with 2.7kWp is about 1.2kW

I've access to logging yeah, I might throw a post up from the work laptop tomorrow so.

championc

Alkers wrote: »

That's why I posted it having seen theirs, I think it's more of a case of theirs being low than mine being high though.

Not sure of the slope, they're on the roof of a 1950s terraced house - ballpark 30 degrees? Due south, no shading.

Maybe take this over onto the Solar PV Hints, Tips and Troubleshooting thread. Have you access to data each day ? I'd expect your output on a clear day at solar noon to be around 1.5kW. My peak continuous generation on a 22° roof slope with 2.7kWp is about 1.2kW

Alkers

championc wrote: »

What angle / slope are they at ? I see 6kWp install from 16Dec with similar output. Or what's the secret ? Either than or something counting everything twice.

Sorry for being negative but it just doesn't seem right based on the output stats from so many systems

That's why I posted it having seen theirs, I think it's more of a case of theirs being low than mine being high though.

Not sure of the slope, they're on the roof of a 1950s terraced house - ballpark 30 degrees? Due south, no shading.

championc

Alkers wrote: »

2.52kWp south facing, Dublin city, installed Dec 12th.
December total 58.4kWh

What angle / slope are they at ? I see 6kWp install from 16Dec with similar output. Or what's the secret ? Either than or something counting everything twice.

Sorry for being negative but it just doesn't seem right based on the output stats from so many systems

Alkers

Kurt_Godel. wrote: »

6kW south-facing, South Wicklow

Installed Dec 16th

Dec total 54.9kW

2.52kWp south facing, Dublin city, installed Dec 12th.
December total 58.4kWh

tails_naf

Taking the format from DrPhilG

December Stats
6.4kWp (5.1 SSE, 1.3 WSW) , 4.8kWh battery, Eddi, dumb electric car charger – Tipperary

Generation – 117 kWh
Export – 0.5 kWh
Divert – 22 kWh
Import – 655 kWh

Best day - 4th, 10.4kWh
Worst day - 9th, 0.1kWh

Totals so far:
November - 163kWh
December - 117kWh

buzz11

1.42 Khp south facing (5 panels) Galway

Dec 35 kWh
Nov 37 kWh
Oct 103 kWh
Sept 115 Kwh
Aug 146 Kwh
Jul 153 Kwh
Jun 148 Kwh

Annual totals
'20 = 1.36MWh
'19 = 1.38MWh

Kurt_Godel.

6kW south-facing, South Wicklow

Installed Dec 16th

Dec total 54.9kW

denismc

handpref wrote: »

What is your orientation Denis?

Reason I ask is my old man may consider installing solar. He has a nice south facing orientation but we want the minimum outlay to keep the payback time as short as we can.
I couldn’t recommend my own installer so we will be starting a fresh.

Knowing what size arrays and orientation’s actually generate is the real hard info people need to make an informed decision. The thread is golden for that info ðŸ‘ðŸ»

I am South facing near the Old Head of Kinsale, so about as far south as you can get!

slave1

4.1kWp SW facing with heaving tree shading from around 11.30am.

65.9kWh generated
9.16kWh sent to Eddi
zero to Zappi
zero export
1,232kWh imported

Lined up another string in next week or so which will be 3.3kWp NE facing so will likely add little given low sun.
Optimisers to SW facing string hopefully by end of the month