My understanding is that Governments are heading for a 1:1 ratio for feed in tariffs and if correct then there will be no advantages to a solar system.
I am taking a different route; a reduction in the amount of electricity I use. First change is to just stop wasting it, such as, turning off all appliances that have a standby (of which there a quite a few in this house; seems just about every appliance has to have a clock these days) Another change is replacing all light fittings to LCD, some with battery backup.
