I'll post more when we've got the graphs into order but we've just looked at our energy use:energy produced ratio for the past 12 months (October 2013-September 2014).
Last year we generated a whopping 96.1% of all our energy.
The previous year (2012-13) that figure was 84% of the energy and we think the higher amount this year is partly a result of less snow and partly thanks to understanding how to fly the house.
So, despite all the quirks and all the naysayers, the evidence suggests that a combination of insulation and solar panels is how you cut your energy bills and reduce your load on the National Grid. It's not rocket science......
(.... or is it?)