Actual Generation

[SRE]

Being in the darkest North I was wondering what you guys in the enlightened South were generating from 4kwp systems. We get between 3,300 kwh and 3,600 kwh depending on panel/inverter configuration for South ish facing roofs. I'm not bothered particularly about panels/inverters etc for this exercise more just some ball park figures to roughly compare our generation with.

 

[whinmoor]

My parents near Norwich in Norfolk have a 4kWp system (Caymax & Eversolar) on a south-facing, unshaded roof. Their monthly generation has been as follows (prediction in brackets):

Jan - 152 (121)
Feb - 208 (181)
Mar - 371 (277)
Apr - 333 (379)
May - 425 (439)
Jun - 414 (426)

So, for the first six months of the year, they generated 1903kWh against a prediction of 1823kWh. I think most people experienced the "quirk" of having a better March than April.

 

[Worcester]

Warwick 3.90 kWp
Month - Generated - Efficiency - Low - High - Average - Comments
Jul-12 - 180.721kWh - 2.726kWh/kW - 4.352kWh - 19.103kWh - 10.630kWh - Partial Month (17 days)
Jun-12 - 344.931kWh - 2.948kWh/kW - 2.796kWh - 22.044kWh - 11.497kWh -
May-12 - 446.313kWh - 3.692kWh/kW - 1.853kWh - 24.983kWh - 14.397kWh -
Apr-12 - 360.283kWh - 3.079kWh/kW - 1.742kWh - 21.238kWh - 12.009kWh -
Mar-12 - 357.599kWh - 2.958kWh/kW - 2.361kWh - 21.202kWh - 11.535kWh -
Feb-12 - 161.887kWh - 1.431kWh/kW - 1.031kWh - 14.739kWh - 5.582kWh -
Jan-12 - 110.709kWh - 0.916kWh/kW - 0.737kWh - 7.561kWh - 3.571kWh -
Dec-11 - 57.320kWh - 0.565kWh/kW - 0.211kWh - 4.663kWh - 2.204kWh - Partial Month (26 days)

Jan-Jun 1781.7 vs SAP 3348 for the year ~ 1674 Six months

 

[SRE]

That's interesting, here are our Jan - Jun figures for our 3.96kwp ESE facing roof, with a telephone wire running about 150mm above it.

Jan - 58
Feb - 114
Mar - 337
April - 448
May - 543
Jun - 409

Total - 1909

and our panels are approaching 2 years old so should have degraded by about 1% - I wonder if the longer days really do compensate for the lower irradiation figures.

 

[SolarCity]

Our best performing system is 4,500 kWh in Cornwall. Nothing we have installed in the West Midlands comes near the southern installs.

 

[SRE]

I think I need to move to Cornwall! Even with competition it's got to be an easier sell.

 

[Worcester]

Our best performing system is 4,500 kWh in Cornwall. Nothing we have installed in the West Midlands comes near the southern installs.

@SolarCity, have you got the figures for this year month / month?

 

[SolarCity]

For installs in West Midlands or Cornwall?

 

[Worcester]

Both please Especially the West Midlands, Cornwall will just make us jealous (But then I'm greedy! :29

 

[SolarCity]

I'll see what I can dig out