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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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handpref

denismc wrote: »

Dec 2020 88kWh from 2.08 kW panels, 20 kW more than last December.

Total for the year 2125kWh which is 65 more than last year!

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»

Winterman1234

Winterman1234 wrote: »

November Values, South East facing , 2.4kwp,Donegal

(Predicted Gen - 62kWh)

Actual Gen - 35.5kWh
Grid Consumption - 167kWh
Hot Water Eddi - 10.2kWh
Lowest Daily Gen on the 23rd - 0.1kWh
Highest Daily Gen on the 7th - 4.4kWh

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

championc

championc wrote: »

3.6kw South Facing - South Dublin - 22 deg slope - 10kWh LiFePO4 Batteries
Live System Link - https://www.solarmanpv.com/portal/Terminal/TerminalMain.aspx?pid=95390

January Generated - 75kWh
February Generated - 121.55kWh
March Generated - 200.59kWh
April Generated - 279.11kWh
May Generated - 396.34kWh
June Generated - 264.13kWh
July Generated - 261.88kWh
August Generated - 254.10kWh
September Generated - 268.62kWh
October Generated - 151.43kWh
November Generated - 90.4kWh

December Generated - 56.47kWh / Consumed - 342.71.8kWh / Imported - 352.09kWh / Exported - 3.15kw / Eddi - 3kw / Zappi 0kw
Batteries - Charged 226.78kw / Discharged 195.98kw (86.42%)

Meter Readings 02537 (00601 Day / 01936 Night)

ANNUAL GENERATION - 2.41MWh

jimmyging

6.2 ground mounted system
70 kw production a drop in the ocean compared to our consumption of 3.5 mwhrs ..

AidenL

Donegal, 6.2kw system, south facing.

104.2kwh
Best day 7th Dec , 9.1kw

idc

December Generated 79.1 kWh - 4.65 kWp (2.17 SE, 2.48 SW) North Dublin
345 kWh imported

Best Day 24th - 4.6 kWh
Worst Day 21st & 23rd - 0.6 kWh

Based on revised projections value of 114 kWh I got 69% of that (my predicted values don't take shading into account!)
I changed my predictions as i realised my house is not perfectly aligned to 45 degrees which is the value most installers used!

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

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!

Kurt_Godel.

6kW south-facing, South Wicklow

Installed Dec 16th

Dec total 54.9kW

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

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

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

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

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: »

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: »

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.

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

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?

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?

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

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.

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:)

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

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

Kurt_Godel.

6kW south-facing, South Wicklow

Jan total 171.4kW

Best day 23rd 16.1kW

Worst 20th 0.6kW

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

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)

bod71

bod71 wrote: »

Dec Gen. 46kwh.

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

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%

irishchris

2.88kwp SW

January generation: 107.7kwh