Green power (how much electricity do you use?)

Our household of four consists of two adults (Kerry-Anne and I) and two children (cats, Elizabeth and William). I think we're pretty conservative in terms of energy consumption and use about 700kWh's of electricity at a cost of about 700 ZAR per month.

I don't think we use that much energy, but wouldn't it be great if regular households could be completely self-sufficient in terms of energy? Perhaps some day hey?

How much electricity do you use each month, and how much do you pay for it. I'd be especially keen to know what you use and how much you pay for it - especially if you're from another country.