Christ thats got to be wrong have you got a football pitch in your garden with flood lights or something?I moan about my eletric bills of 300 to 350 a year for my villa although im only out in turkey about 3months of the year where i have everything running 3air con units,tv,cooker,kettle,microwave,etc.I think theres something dodgy going on there it could be someones hooked up to your electric,Down the road from me some families are hooked up to the roadside lamp posts so it would not surprise me get someone to check it out for you possibly an english electrican living out in turkey,good luck.