From the RenewableUK website FAQ: One 1.8 MW wind turbine at a reasonable site would produce over 4,700 000 kWh of electricity each year, enough to meet the annual needs of over 1,000 households.. (the average household in the UK, with 2 parents and 2 children, uses approximately 5500 kWh of energy per year. -Strathclyde University statistic)