Renewables: "talking 'bout my generation"

Oscargrouch

Dodo0808 wrote: »

Yippee!

The forecasters got it right for a change:D

28.5 kWh :j:beer: my new best day.

Looking at some of the more experienced commenters, I doubt I'll see any more than this....but I ain't complainin'

You may be wrong there; on 1st June 20013 I managed 7.36 O's: 4 kWp system would have been 29.44 kWh, hang on to your 'Hot Tub'. :rotfl:

Today a Hawaii + 1.68 O's......

The following Pie Chart is for mac2008 wherever he's gone....



Only 59% of generation used; but if you say you beat that, I'll say...

Vomityspice

My best day ever as well!

22.81Kwh's so 5+ O's in sunny Brixworth.

shafeeq

4.02 O's. Morning had continue sun but it only generated 1.70 kwh at 11.30.
Rest was generated in afternoon....

groovyf

4.3 O's... 17.25kWh. It was looking so good for my first Hawaii, until the clouds appeared early afternoon.

Dodo0808

Oscargrouch wrote: »

You may be wrong there; on 1st June 20013 I managed 7.36 O's: 4 kWp system would have been 29.44 kWh, hang on to your 'Hot Tub'. :rotfl:

Today a Hawaii + 1.68 O's......

The following Pie Chart is for mac2008 wherever he's gone....



Only 59% of generation used; but if you say you beat that, I'll say...

Trust me, I'll never be so happy to be proven wrong😉

I can't seem to get close to using more than 60pc of generated, and that with putting tub on max warp speed. I guess it's a case of practice makes perfect...or is that something else?😜

nigelpm

KevinG wrote: »

Just shut down for my highest ever generation of 13.2 kWh (6.6 O). This is thanks to almost continuous sunshine but relatively low temperatures. Experience shows me that this will be bery hard to beat in June/July when the temperature is much higher.

I still don't buy this but we'll find out shortly.

Equaled my best day (previously in April) but plenty of cloud around so should hit 30Kwh on a clear day.

The longer hours of sunshine will I'm certain take me further in June.

Edit - Actually did 27.1Kwh (6.78 O) today so best day so far.

April was 449Kwh for the record.

Dave_16

I've been Reading this thread for months now, (mostly daily) and I kept thinking when I get a Hawaii I will shout it from the rooftops so to speak, the daily readings have been quite low, only 5-13 Kw/h, with 13 Kw/h yesterday.

Now I've realised I've had the Solo Pv meter set wrong as it was displaying Kg of CO2 not Kw/h I realise YESTERDAY WAS A HAWAII 6.53 O's YAAAYYYY, and if I check back in the uploads I bet there will be more, so, well chuffed.

Dave

Martyn1981

nigelpm wrote: »

I still don't buy this but we'll find out shortly.

Hiya. I think the trick to this, is to ponder where the 'extra' daylight comes from. Lots of generalisations here (so please be kind and let me off some of the detail).

For a south facing system, it's sweet spot will be roughly 9am to 3pm (GMT).

Co-incidentally(!) that corresponds to SE to SW sun, and we get that even in mid winter, just.

So the extra few minutes of sun that get added each day till late June are added in the SE to NE range, and the SW to NW range. This extra sunlight is very welcome, but its additional benefit to a south facing system diminishes as it gets further to the 'sides'.

Of course the higher sun, and better sun to panel angle (depending on roof pitch) helps, and being nearer to the sun - ok, only fractionally nearer in percentage terms, but the change in angle means the sun travels through less of the atmosphere in the summer, helps.

Probably the biggest reason for June (followed by May and July) generation being the highest for most of us, is simply better weather on average, so more good days and less bad days.

Then the other killer kicks in, panel temps. The colder the ambient temp, and the greater the air movement is, the more panel cooling we get. Long hot still days in June can knock generation down to 70% or so of kWp, against 90% (even 100%) figures in Apr.

So, not knocking your assumptions that it'll get better, but you'll probably be surprised how seemingly disproportionate the gains are. Sadly!

I, on the other hand, love the BST months, as that SE to NE + SW to NW sun is massively beneficial to my generation, and as an added benefit, the high noon sun, is able to hit all panels (though not at an ideal angle) at the same time, but even so, I regularly see a sustained 4.2kW from 12 to 2pm, in good summer sunshine.

Mart.

nigelpm

Martyn1981 wrote: »

So the extra few minutes of sun that get added each day till late June are added in the SE to NE range, and the SW to NW range. This extra sunlight is very welcome, but its additional benefit to a south facing system diminishes as it gets further to the 'sides'.

Of course the higher sun, and better sun to panel angle (depending on roof pitch) helps, and being nearer to the sun - ok, only fractionally nearer in percentage terms, but the change in angle means the sun travels through less of the atmosphere in the summer, helps.

So, not knocking your assumptions that it'll get better, but you'll probably be surprised how seemingly disproportionate the gains are. Sadly!


Mart.

Good post Mart but a couple of really important points I think :

The higher sun is a larger benefit than you are suggesting. I looked at my normalised curve yesterday against the one in April and the greater generation at the same times of the day was telling i.e. at 10am I had almost 3kwh y/day but only 2.6kwh in mid April (rough figures)

The benefit will certainly be more enhanced for me in the summer as I've got a 25 deg roof and go against me in Winter.

I agree that I'll only improve by 3-4 Kwh (complete guess) and that some days will be hammered if air temps go above 25 deg BUT my point really was that it won't be difficult to beat what I'm doing now on a cloud-free but cool day in June.

legoman62

Not quite an Hawaii yesterday.......Did better, I made 6.15 O's or 24.6kWh:beer:
Also used least amount of leccy (2.1 kW) in a day when we were actually in:T