Grid Connected Solar Electricity

 
 
 

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Select below for annual records since system installed :-

Energy usage / PV performance data 2004. . Energy usage / PV performance data 2005

Energy usage / PV performance data 2006. .Energy usage / PV performance data 2007

Energy usage / PV performance data 2008. .Energy usage / PV performance data 2009

Energy usage / PV performance data 2010. .Energy usage / PV performance data 2011

  
 
This page gives details of the 1.8kWp system using 10 Sanyo HIT hybrid PV panels and a sunnyboy 1700 grid connect inverter. The system cost £11,300 fully installed, including grid connection charges, and the Government paid £5,400 towards it through the PV grant scheme.
Total generated to date (from 3-3-04) = 13115 kWh

Total generated in 2012 = 558 kWh (updated weekly)

Last week total = 48 kWh, Best week so far = 58 kWh,
Best day so far = 11 kWh (weekly average amount imported = 18kWh, last week 14 kWh) Click the following for 2012 data daily kWhrs and Weekly kWhrs table and Cumulative totals graph and Monthly comparison data graph and Annual comparison graph (data from 2005 onwards) and Weekly Import v Generated totals graph

The system data states that this array should produce 1600 kWh annually (SAP gives output as 1394 kWh, PVGIS as 1520kWh annually so actually way above both of them)

2005 generated 1619 kWhrs (101%)
2006 generated 1640 kWhrs (102%)
2007 generated 1619 kWhrs (101%)
2008 generated 1547 kWhrs (97%)
2009 generated 1531 kWhrs (96%)
2010 generated 1562 kWhrs (98%)
2011 generated 1578 kWhrs (99%)

We generate on average 113% of SAP calculated output. Because SAP calculations are based in an East Mildlands location and we are further south
The table below compares the monthly generation against the PV-GIS predicted output. Red figures are below predicted level and green figures are above.
I have signed up to the Good Energy Home Generation programme in which they pay me 9.4p per unit (kWh) for ALL generated units (before the Feed In Tariff started this was 15p) and I don't need a separate Export meter installed as they estimate the amount I export as being 50% of generation, worth 3.1p/kWh, this is until smart meters are fitted in a few years time which can measure import and export.
Sanyo have continued to improve their panels, each panel can now produce 210 watts instead of 180 for the same physical size. Our house has featured in 2 national magazine articles, Click on magazine name to view article • Organic Life and • New Consumer


Close up of finished roof
 
  PV system balance of components pictured below. Left picture shows inverter with DC disconnect below left and AC output through data transmitter & AC spur on right. Centre photo Readouts for Hot water Temp (top) & Watts / kgCO2 / kWhrs (below). Right photo shows kWhr meter & trip, lockable AC disconnect and distribution board.  
 
 

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