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[Sticky] Solar Power Output – Let’s Compare Generation Figures

 
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Solar Photovoltaic (PV)
Last Post by Andris 2 weeks ago
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 Andris
(@andris)
Reputable Member Member
Joined: 4 years ago
Posts: 117
28/02/2025 9:12 am  

8.4kw System.

Very shaded in January 159kw

February shading improvement but still bad after 2 pm. 275kw.

 

16kw Samsung TDM ASHP. 8.4kw PV, power optimizers 20×420watt panels 6kw SolarEdge inverter.


   
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 IanMK13
(@ianmk13)
Reputable Member Member
Joined: 2 years ago
Posts: 194
28/02/2025 12:55 pm  

6kWp installation (installed last year, so no historical comparisons):

November 2024  -  160kWh

December 2024  -  95.7kWh

January 2025     -  176.5kWh

February 2025   -  214kWh

 

I was pleasantly surprised that January and February have been an improvement on November.  I don't recall November being so dull, nor this year being particularly sunny (so far).

Best day this year was yesterday at 23kWh.


   
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Toodles
 Toodles
(@toodles)
Illustrious Member Contributor
Joined: 3 years ago
Posts: 1952
28/02/2025 3:13 pm  

@ianmk13 From other reports, it looks as though January was a rather dull month for most of us solar hunters! 2024 was a total of 6 MWh but 2023 was 6.5 MWh. We have had clouds loathed to move away for months but, this February has beaten the 29 day February of ‘24 by a small margin as we had 196 kWh last year and in one day less, we are heading for near 230 kWh this year. I hope this is going to be a trend - our 8.1 kWp. solar harvester is less than ideally place but we need every Watt we can harvest! Rewards, Toodles.

Toodles, he heats his home with cold draughts and cooks his food with magnets.


   
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Majordennisbloodnok
 Majordennisbloodnok
(@majordennisbloodnok)
Noble Member Moderator
Joined: 3 years ago
Posts: 816
28/02/2025 4:04 pm  

From our 6.5kWp array:

  2023 2024 2025
Jan 151.6 158.8 110.6
Feb 238.5 168.7 167.8

 

So it's fairly plain that this year has been somewhat darker than the usual for me. 

This post was modified 3 months ago by Majordennisbloodnok

105 m2 bungalow in South East England
Mitsubishi Ecodan 8.5 kW air source heat pump
18 x 360W solar panels
1 x 6 kW GroWatt battery and SPH5000 inverter
1 x Myenergi Zappi
1 x VW ID3
Raised beds for home-grown veg and chickens for eggs

"Semper in excretia; sumus solum profundum variat"


   
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 Tim441
(@tim441)
Prominent Member Contributor
Joined: 3 years ago
Posts: 283
28/02/2025 5:01 pm  

From our 6.0kWp array. East facing at 5deg pitch. Output generally feels OK for sub-optimal installation. Somerset, SW England

  2023 2024 2025
Jan 104 129 110
Feb 160 221 180

Totals:

2022: 5109

2023: 4442 included 15 day outage in June. Losing around 400kwh? Comparison say 4842?

2024: 5135

Installer estimate was 5129pa. Seems bang in line.

Also have additional small 2.2kw array on South facing roof with circa 40 deg pitch. No monitoring until mid 2023

Jan 50kw

Feb 60 kw

2024 total 1500kw

 

This post was modified 3 months ago 2 times by Tim441

Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS
MG4 EV


   
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 Andris
(@andris)
Reputable Member Member
Joined: 4 years ago
Posts: 117
28/02/2025 5:22 pm  

Atchally, my final number was an estimation but now that the sun is almost gone we hit 283kW. Just today was 30kW.

16kw Samsung TDM ASHP. 8.4kw PV, power optimizers 20×420watt panels 6kw SolarEdge inverter.


   
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 NJT
(@njt)
Estimable Member Member
Joined: 10 months ago
Posts: 53
28/02/2025 5:33 pm  

Our 1st winter with 6.1kWp solar.

South facing no shading

Dec 108kw

Jan 213kw

Feb 247kw

This post was modified 3 months ago by NJT

   
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Toodles
 Toodles
(@toodles)
Illustrious Member Contributor
Joined: 3 years ago
Posts: 1952
02/03/2025 7:33 pm  

@njt Almost a textbook day for the first time this year! Here’s hoping for many more! Toodles.

IMG 6321

 

Toodles, he heats his home with cold draughts and cooks his food with magnets.


   
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 NJT
(@njt)
Estimable Member Member
Joined: 10 months ago
Posts: 53
02/03/2025 7:50 pm  

@toodles  yes superb, today plus yesterday totals 60kw yield, 42kw exported 👍 

Looking full sun for the next 4 days here too.


   
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 Tim441
(@tim441)
Prominent Member Contributor
Joined: 3 years ago
Posts: 283
02/03/2025 9:08 pm  

From our 6.0kWp array. East facing at 5deg pitch. Output generally feels OK for sub-optimal installation. Somerset, SW England.

Cleaned this morning - due to pitch they were fairly green & algae covered. 

Interesting to note output today 20.6kwh vs 18.5kwh yesterday. Always difficult to be 100% certain it's like with like day.

Worth noting this is first day exceeded 20kwh since last September. 😱 😱 

But also have additional small 2.2kw array on South facing roof with circa 40 deg pitch. Also cleaned but not very dirty and therefore impact minimal. Almost exactly same output today as yesterday. 6.62kwh today vs 6.48 kwh yesterday.

Perhaps useful indicator that cleaning can be useful on low pitch arrays?

Screenshot 20250302 195737
Screenshot 20250302 195759
Screenshot 20250302 195821
Screenshot 20250302 195904
This post was modified 3 months ago by Tim441

Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS
MG4 EV


   
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 Andris
(@andris)
Reputable Member Member
Joined: 4 years ago
Posts: 117
31/03/2025 7:16 pm  

Best March yet ( in the last 3 years)! Now that most of my shade is gone some trees trimed. I hit 731kW 😊.

This post was modified 2 months ago by Andris

16kw Samsung TDM ASHP. 8.4kw PV, power optimizers 20×420watt panels 6kw SolarEdge inverter.


   
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 Tim441
(@tim441)
Prominent Member Contributor
Joined: 3 years ago
Posts: 283
31/03/2025 7:30 pm  

6kw panels  East facing. 6deg pitch

Mar2025 528kwh

Mar2024 393kwh

Mar2023 314kwh

Mar2022 456kwh

2kw panels  South facing. 45deg pitch

Mar2025 167kwh

Mar2024 116kwh

Mar2023 not monitored

 

This post was modified 2 months ago by Tim441

Listed Grade 2 building with large modern extension.
LG Therma V 16kw ASHP
Underfloor heating + Rads
8kw pv solar
3 x 8.2kw GivEnergy batteries
1 x GivEnergy Gen1 hybrid 5.0kw inverter
Manual changeover EPS
MG4 EV


   
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