For a long tale about the reasons for going with solar (and wind) power on a very small scale, see here:
https://www.electrical-contractor.net/ubb/Forum9/HTML/000757.html The only reason for going the PV route was because the PoCo was quoting almost $40,000 to provide grid power. If utility power had been available at reasonable cost then PV wouldn't have even been considered.
But to address the question of total solar for residential, commercial, and industrial uses, I don't see it as being viable -- And certainly not in the English climate!
[This message has been edited by pauluk (edited 02-26-2007).]