Stats

Estimated Annual Prediction Figures

• output1 - 3434 kWh (installers)
• output2 - 3433 kWh (PVGIS)
• income1 - £ 1486.75 (installers, based on FiT @ 43.3p only)
• income2 - £ 1539.70 (PVGIS, based on FiT @ 43.3p + export of 50% @ 3.1p)
• note: these income estimates were calculated using the 2011-12 rates

FiT & Export Rates

• 2011-12 - 43.3p/kWh FiT + 3.1p/kWh * 50% deemed for Export = 44.85p/kWh total
• 2012-13 - 45.4p/kWh FiT + 3.2p/kWh * 50% deemed for Export = 47.00p/kWh total - introduced on 1st April 2012 - an increase of 4.8%, linked to inflation
• 2013-14 - 46.81p/kWh FiT + 3.3p/kWh * 50% deemed for Export = 48.46p/kWh total - introduced on 1st April 2013 - an increase of 3.1%, linked to RPI inflation

FiT and export payments - contract with E.ON 

• Q1 - 19-11-11 - 22-02-12
• 00000 - 00474 = 474 units @ 44.85p = £212.59
• [submitted 22-02-12, received 27-03-12 (34 days) direct into bank account]
• Running total for 3 months = £212.59 = 13.8% of PVGIS prediction estimate for full year

• Q2 - 22-02-12 - 22-05-12
• 00474 - 01599 = 1125 units = £518.54 total
• 475 units @ 44.85p = £213.04
• 550 units @ 47p = £305.50
• [submitted 22-05-12, received 09-07-12 (48 days) after much chasing, hassling & persuasion]
• Running total for 6 months = £731.13 = 47.5% of PVGIS prediction estimate for full year
• note: I didn't realise that the rate would be changing during Q2 so didn't submit an interim reading for the end of March 2012 to avoid E.ON guesstimating where the 44.85p ended and the 47.0p began.  Luckily for me, whichever formula they used to calculate the splits didn't go too far wrong and the calculation ended up 50p in my favour, probably because the end of March was sunnier than they predicted.  I will be submitting interim readings in future though, just in case.

• Q3 - 22-05-12 - 22-08-12
• 01599 - 02925 = 1326 units @ 47p = £623.22
• [submitted by phone late 22-8-12, received 29-08-12 (5 working days)]
• Running total for 9 months = £1354.55 = 88% of PVGIS prediction estimate for full year

• Q4 - 22-08-12 - 22-11-12
• 02925 - 03764 = 839 units @ 47p = £394.33
• [submitted by phone early 22-11-12, received 28-11-12 (4 working days)]
• Final total for 12 months = £1747.64 = 10% above PVGIS prediction estimate for full year

• Y2 Q1 - 22-11-12 - 22-02-13
• 03764 - 04165 = 401 units @ 47p = £188.47
• [submitted by e-mail on 22-02-13, received 28-11-12 (5 working days)]
• 15% or 73 kWh down on Y1 Q1
• Running total for 15 months = £1936.11

• Y2 Q2 - 22-02-13 - 22-05-13
• 04165 - 05190 = 1025 units = £493.14 total
• 245 units @ 47p = £115.15
• 780 units @ 48.46p = £377.99
• [submitted by e-mail on 22-05-13, received 31-05-13 (6 working days)]
• 8.89% or 100 kWh down on Y1 Q2
• 10.8% or 173 kWh down on Y1 so far
• Y2 so far 1426 kWh; £681.61
• Running total for 18 months = £2429.25

• Y2 Q3 - 22-05-13 - 22-08-13
• 05190 - 06635 = 1445 units @ 48.46p = £700.25 total
• [submitted by e-mail on 22-08-13, received 31-08-13 (6 working days)]
• 8.89% or 120 kWh up on Y1 Q3
• 10.8% or 50 kWh down on Y1 so far
• Y2 so far 2870 kWh vs 2925; £1381.61
• Running total for 21 months = £3129.25

Y2 Q4 - 22-08-13 - 22-11-13

06635 - 07499 = 864 units @ 48.46p = £418.69 total

[submitted by e-mail on 22-08-13, received 31-08-13 (6 working days)]

8.89% or 120 kWh up on Y1 Q3

10.8% or 50 kWh down on Y1 so far

Y2 so far 2870 kWh vs 2925; £1381.61

Running total for 24 months = £3129.25

Y3 Q1 - 22-11-13 - 22-02-14

07499 - 07997 = 498 units @ 48.46p = £241.33 total

[submitted by e-mail on 22-08-13, received 31-08-13 (6 working days)]

8.89% or 120 kWh up on Y1 Q3

10.8% or 50 kWh down on Y1 so far

Y2 so far 2870 kWh vs 2925; £1381.61

Running total for 27 months = £3129.25

Quarterly Performance (in kWh) 

Monthly Performance (in kWh)

• showing full months only:

* please note that the sunshine figures can be misleading because they refer to a percentage of the expected or average sunshine level for that month, not to an actual number.  
Therefore the benefit of January 2012 being 40% above average is much smaller than the disadvantage of June being 40% below average.  In fact the difference is half / double: 41 units extra in January, 87 units short in June.
This is because the average / expected level of sunshine for January is a fraction of June, not only due to the weather factor but the length of the day (15th January - 8 hours; 15th June - 17 hours).