Renewables: "talking 'bout my generation"

EricMears

Today could have been so great !

Started generating at 05:50 and the clear blue cloudless sky promised so much. Alas, power cut struck at 06:45 and lasted till 11:35 ; not a flicker of cloud visible during the period.

From power restored till a few minutes ago we'd managed 17.25 kWh - which is in itself better than an average July pvgis forecast. In that period yesterday we'd generated 9Kwh and I really think today was far sunnier than yesterday so my 'entitlement' would have been at least 26 kWh and probably a couple more.

Another power cut has just happened. Here's hoping it's fixed by morning !

Apart from today's disaster, this week has been pretty good :-23rd 25.56
22nd. 22.51
21st 21.25
20th 7.8

shafeeq

hi

15.33kwh today, bit more then yesterday. The shade from the treei s there till 11am. oh well...

shafeeq

KevinG

The decline continues - cloud-free again but slightly higher temperatures and slightly less daylight so 12.31kWh vs 12.49 yesterday.

Kernel_Sanders

EricMears wrote: »

I really think today was far sunnier than yesterday so my 'entitlement' would have been at least and probably a couple more.
Another power cut has just happened.

Sorry to hear about your outages Eric. At least the second one had the decency to occur after shutdown!
You wouldn't have reached even 26 kWh because I had unbroken sunshine virtually all day (unlike yesterday) yet production was down to 25.79. I think it must have been a fair bit hotter today.

JH69

We managed 25.36Kwh today... that's down from 26.48 for yesterday. Not sure how much of that was down to the heat or down to the fact that I turned Optitrac on to reduce the effect of some early morning shading....

Oscargrouch

EricMears wrote: »

I really think today was far sunnier than yesterday so my 'entitlement' would have been at least 26 kWh and probably a couple more.

I am with Kernal on this one, far too hot today.

KevinG wrote: »

The decline continues - cloud-free again but slightly higher temperatures and slightly less daylight so 12.31kWh vs 12.49 yesterday.

Think you are bang on with your analogy, hence my figures bear this out. Look forward to freezing October, cloud free days:rotfl:.

Kernel_Sanders wrote: »

You wouldn't have reached even 26 kWh because I had unbroken sunshine virtually all day (unlike yesterday) yet production was down to 25.79. I think it must have been a fair bit hotter today.

Quite correct Kernel: todays high was 27.6C @ 16:37; yesterday 25.6C @ 16:36.

Hence I made 16.8kWh today compared to 17.5kWh yesterday; even though the hours of sunshine were exactly the same today as yesterday; 11.18 hrs. I would guess it was just as sunny in Sheffield (Shafeeg) but not as warm as yesterday. Sheffield has some advantages then? :rotfl:;)

Kernel_Sanders

Oscargrouch wrote: »

Sheffield has some advantages then? :rotfl:;)

Sure does; you get a lot more house for your money than in Northants (even compared to Corby):)

John_Pierpoint

sly_dog_jonah wrote: »

Our peak day was 24.4kWh or 6.6kWh/kWp. We haven't had a whole years generation but PVGIS prediction is 827kWh/kWp.

Because of our SE orientation we will never be as good as a due South system.
:beer:

Total for Monday 23.91 units on the export generation meter (inverter was boasting 24.1).
I have managed to top 25 exported units twice in late May and again circa 21 June.

Tuesday total only 23.66.

The panels were a bit later starting today Wednesday. I am wondering if the build up of brown tinged fug over the Olympics might be a factor.

[Obviously nothing like as bad as the Beijing Olympics, where the city was "turned off" and the clouds seeded to clear the fug.
http://www.nlm.nih.gov/medlineplus/news/fullstory_125189.html
]

shafeeq

Oscargrouch wrote: »

Sheffield has some advantages then? :rotfl:;)

It sure does, I live there .

Back to normal weather... cloudy... but warm.

Shafeeq

sly_dog_jonah

John_Pierpoint wrote: »

Total for Monday 23.91 units on the export generation meter (inverter was boasting 24.1).
I have managed to top 25 exported units twice in late May and again circa 21 June.

Tuesday total only 23.66.

You're confusing export with generation.

• A generation meter records all power generated from a PV system.
• An export meter records all excess power sent back to the grid if it is not used in the property.

All PV systems have a generation meter. Very few have an export meter. Exported power will always be less than generated power.