Lorraine Griffiths

Silly question time...... So, if you've installed a 5.5kw system & you're only consuming approximately 50% does this mean that you've effectively installed too large a system? So, if you'd installed say a 3.5kw system (if there is such a thing) would it have been sufficient or am I looking at this too simplistically? Also, is there a website of some kind that allows you to work out how much electricity you would potentially be using? It's no good basing it on our current usage as we live in the most electricity unfriendly house on the planet! I'm finding all the responses really interesting so thanks for everyone's help