If every roof had a solar panel.....

[vrsmxtb]

...would we even need power stations?

I know its a huge cost in the real world, but theoretically, if every building in the UK had solar panel roofing and a means of storing excess energy for gradual use overnight / when low light levels etc. would there still be a need for centralised power sources?

Ah just noticed there's a Science forum, sorry mods.