Performance data

SolarRoofSols · Oct 3, 2012

Hey guys and gals

I am in need of some performance data for a 2.5-3kw system, SW facing in Sheffield area, 40degree pitch.

We had a call from a client reporting low generation between July and start of Sept which we are going back to look into. Run some figures through PV potential estimation utility and we are looking a little low but wanted some real data to see how much the non summer has effected generation. I have had a look on Sunny Portal but can't find a good comparison which is still hooked up to Webbox.

Cheers in advance!

dansk · Oct 3, 2012

Just looked at a couple - one in Shipley 3kwp SW very shallow pitch roughly 1200kwh since 1/6/12 and 1239 kwh from S/E in leeds with part shading 3.25kwp. (both solar edge systems)

Worcester · Oct 3, 2012

Try PVOutput

Worcester · Oct 3, 2012

Half a dozen with S postcodes
Clifton Grove 3.995kW
Shaf 3.000kW
wortley10 3.600kW
TooMuchPower 3.840kW
Andys Confused Roof 3.920kW
JP's Money Spinner 3.952kW

Gavin A · Oct 3, 2012

these figures from Bradford met office station should hopefully allay any fears

Sunshine Hours Average High Temperatures Total Rainfall Levels
2011 2012 proportion 2011 2012 proportion 2011 2012 proportion
Total 714.4 556.8 78% 71.7 70.7 99% 179 457.2 255%
May 176.2 198.1 15.4 15.7 36.8 49.8
June 203.7 94.2 18.2 16.5 50.4 164
July 173.3 138.3 19.5 18.7 39.4 115.6
August 161.2 126.2 18.6 19.8 52.4 127.8

we've had a similar query from someone in Wakefield recently, so have the figures to hand.

Gavin A · Oct 3, 2012

and the rain is keeping on coming as well, so much so that I've yet to brave the run to the warehouse to get the van as may jacket must also be in the van....... I may need to build a boat soon.

Worcester · Oct 3, 2012

Get data from here too Met Office: UK rainfall, sunshine and temperature anomaly graphs click on sunshine:
June, July and August all below 'average'

methley · Oct 4, 2012

Considering the weather we've had my systems have performed really well. They've hit their SAP targets and by the end of this month should have achieved their PVGIS predictions also. The system below is a 2.88Kwp SolarEdge with Sanyo HIT's on a 40deg pitch facing south near Bath. Red is the PVGIS prediction, blue is actual.

[ElectriciansForums.net] Performance data

Gavin A · Oct 4, 2012

I've just worked through the figures for sunshine hours from bradford, will be posting them up later.

Gavin A · Oct 4, 2012

Hi Sol, sunshine hours data for July-September from Bradford shows 12% lower than average sunshine hours.

There's also around 150% more rainfall in that period than average, which means the cloud cover would be much darker than average in that period.

[h=2]2011-12 sunlight data and performance guarantee analysis (West Yorkshire)[/h]
It's not a perfect fit for actual insolation levels, but it's the best I can get hold of at the moment, though I'm trying to get hold of more detailed met office data.

Gavin A · Oct 4, 2012

hmm, not sure why that graph's been posted twice.

Performance data

SolarRoofSols

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dansk

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Worcester

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Worcester

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Gavin A

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Gavin A

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Worcester

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methley

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Gavin A

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Gavin A

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Gavin A

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	Sunshine Hours	Average High Temperatures	Total Rainfall Levels
	2011	2012	proportion	2011	2012	proportion	2011	2012	proportion
Total	714.4	556.8	78%	71.7	70.7	99%	179	457.2	255%
May	176.2	198.1		15.4	15.7		36.8	49.8
June	203.7	94.2		18.2	16.5		50.4	164
July	173.3	138.3		19.5	18.7		39.4	115.6
August	161.2	126.2		18.6	19.8		52.4	127.8