Renewables: "talking 'bout my generation"

Martyn1981

pete-20-11 said:

QrizB said:

pete-20-11 said:

right, had a play with PVGIS, estimates seem a bit off - not sure if that's because I've got optimisers installed
supplier estimated 3110 kWh per year, PVGIS reckons 1614 kWh

That sounds like there's something wrong the PVGIS calc. The results are usually much closer than that.

PVGIS azimuth isn't compass degrees, it's degrees from south. Have you told it your panels point north by accident?

Ahh, that might be it. I also use solcast which I assume is the other way around, unless I got that wrong too!

December estimate now comes out at 113 kWh Vs 54.6 kWh actual 

November estimate now 140 kWh Vs 130.4 kWh

Don't worry, it gets us all at first. Also the default losses on PVGIS are quite high, so as systems have improved, it's common to beat the PVGIS average figure. And Solaredge will help to minimise shading and system losses.

Thought I'd check the Met Office and see if they have the Dec 2023 anomaly map for sunshine. I guess they were in work yesterday as it's already done:



For me in Cardiff, it suggests a figure of around 30-50%, so my figure of 66% seems reasonable. But I appreciate many factors contribute to the eventual generation figure.

For Dec 2022 my gen was 91% of target, v's the 90%-110% figure for sunshine:




For 2023 as a whole we have:



Again, for myself, the year is a little below average, and that's reflected in my annual total, coming 9th out of 13yrs.

For the UK as a whole, looks to be a middling year, with Scotland winning a bit.


And lastly, temp affects generation, and 2023 was warmer than the 1991-2020 average:




warmer still, v's the 1961-1990 average:

Martyn1981

Coastalwatch said:

Coastalwatch said:

Finished the month on a good day, well just above average anway, 0.85 O taking Decembers return to 73% of pvgis, 19.06 O's. Hoping for a better start to '24!

Happy to record a whole O for yesterday, so a touch above ave(0.86) for Jan. As for today, inverter still showing a zero total although four panels are suggesting 0.25 Wh's each so thank goodness batteries got topped up last night.

2023 figures

Generated        9255 kWh's, 1045 O's, 102.1 % of pvgis. 

consumed 7408 kWh's = 80%, Export 1847 kWh's. 

Imported 4208 kWh's. 

Total Consumption = 11616 kWh's of which ASHP's 1581, DHW 1351, Towel rads 1496, EV's 3174.

Hi CW, can I ask how much generation your investment in Ripple (the GF wind turbine) made last year? I have my fingers crossed for a figure greater than 2,361kWh.    

Coastalwatch

Martyn1981 said:

Coastalwatch said:

Coastalwatch said:

Finished the month on a good day, well just above average anway, 0.85 O taking Decembers return to 73% of pvgis, 19.06 O's. Hoping for a better start to '24!

Happy to record a whole O for yesterday, so a touch above ave(0.86) for Jan. As for today, inverter still showing a zero total although four panels are suggesting 0.25 Wh's each so thank goodness batteries got topped up last night.

2023 figures

Generated        9255 kWh's, 1045 O's, 102.1 % of pvgis. 

consumed 7408 kWh's = 80%, Export 1847 kWh's. 

Imported 4208 kWh's. 

Total Consumption = 11616 kWh's of which ASHP's 1581, DHW 1351, Towel rads 1496, EV's 3174.

Hi CW, can I ask how much generation your investment in Ripple (the GF wind turbine) made last year? I have my fingers crossed for a figure greater than 2,361kWh.    

No problem Mart, although my curiousity has been raised regarding the 2361kWh figure, only I've been unable to appreciate it's significance!

Delighted to say that after a record December the annual total from our share was 4260 kWh's returning a Capacity Factor of 31.28%. A welcome increase on last years 25.4.

Martyn1981

Coastalwatch said:

Martyn1981 said:

Coastalwatch said:

Coastalwatch said:

Finished the month on a good day, well just above average anway, 0.85 O taking Decembers return to 73% of pvgis, 19.06 O's. Hoping for a better start to '24!

Happy to record a whole O for yesterday, so a touch above ave(0.86) for Jan. As for today, inverter still showing a zero total although four panels are suggesting 0.25 Wh's each so thank goodness batteries got topped up last night.

2023 figures

Generated        9255 kWh's, 1045 O's, 102.1 % of pvgis. 

consumed 7408 kWh's = 80%, Export 1847 kWh's. 

Imported 4208 kWh's. 

Total Consumption = 11616 kWh's of which ASHP's 1581, DHW 1351, Towel rads 1496, EV's 3174.

Hi CW, can I ask how much generation your investment in Ripple (the GF wind turbine) made last year? I have my fingers crossed for a figure greater than 2,361kWh.    

No problem Mart, although my curiousity has been raised regarding the 2361kWh figure, only I've been unable to appreciate it's significance!

Delighted to say that after a record December the annual total from our share was 4260 kWh's returning a Capacity Factor of 31.28%. A welcome increase on last years 25.4.

Thanks CW. Sorry for being so cryptic, I was wondering if you were net zero/positive.

The 2,361 figure is the shortfall between your PV gen, and your total consumption. So including your Ripple investment, you are net positive.

I know you (me, and others) have investments in green schemes and generation, but since the Ripple scheme has a direct link (sort of) to your energy/bill*, I can't help but group it together for a nice old ponder or two. Thanks.

*I know it's not the same, but a tiny bit like having your own home wind generation.

Merlin139

Best day of the year yesterday!

2.14 O's

Worst day of the year today!

0.005 O's

Coastalwatch

Martyn1981 said:

Coastalwatch said:

Martyn1981 said:

Coastalwatch said:

Coastalwatch said:

Finished the month on a good day, well just above average anway, 0.85 O taking Decembers return to 73% of pvgis, 19.06 O's. Hoping for a better start to '24!

Happy to record a whole O for yesterday, so a touch above ave(0.86) for Jan. As for today, inverter still showing a zero total although four panels are suggesting 0.25 Wh's each so thank goodness batteries got topped up last night.

2023 figures

Generated        9255 kWh's, 1045 O's, 102.1 % of pvgis. 

consumed 7408 kWh's = 80%, Export 1847 kWh's. 

Imported 4208 kWh's. 

Total Consumption = 11616 kWh's of which ASHP's 1581, DHW 1351, Towel rads 1496, EV's 3174.

Hi CW, can I ask how much generation your investment in Ripple (the GF wind turbine) made last year? I have my fingers crossed for a figure greater than 2,361kWh.    

No problem Mart, although my curiousity has been raised regarding the 2361kWh figure, only I've been unable to appreciate it's significance!

Delighted to say that after a record December the annual total from our share was 4260 kWh's returning a Capacity Factor of 31.28%. A welcome increase on last years 25.4.

Thanks CW. Sorry for being so cryptic, I was wondering if you were net zero/positive.

The 2,361 figure is the shortfall between your PV gen, and your total consumption. So including your Ripple investment, you are net positive.

I know you (me, and others) have investments in green schemes and generation, but since the Ripple scheme has a direct link (sort of) to your energy/bill*, I can't help but group it together for a nice old ponder or two. Thanks.

*I know it's not the same, but a tiny bit like having your own home wind generation.

Ah thanks, hadn't tried that simple comparison. Had to confess to being more concerned with our import figure, 4208, which, thanks to the wind record for December we also covered.

PV generation today 0.07 O. The sun did peep through briefly just lifting the gloom, but in darkness now while 60mph winds batter the bungalow until late evening apparently.

pete-20-11

0.06 Os here. 😕

legoman62

Sunless but not rainless here😡 0.025 O’s…a new low!

JKenH

0.0038 Os here. Worst day ever. Just 30Wh

Alnat1

0.038 O's, back to the gloom.

Ah well, at least we're all heading towards summer now.