, You can meet with solar and condensing oil but you really have to work hard with your ber assessor. i found that using wood burning stoves and 6.2m2 of solar that i was just able to meet the 10kw/m2 requirement. The dept of enviroment really should look at their figures as houses after the 2010 part L will soon start to be overheated with renewables.
Funny enough and going through the deap software that reducing the carbon coefficient and energy requirement through reducing heat losses, only had the effect of increasing the renewable requirement on the deap software.
hope these enforcers actually log on to the internet to see comments from home builders.