So basically you are billed for about 1000kWh/month? That's not a small amount, unless you charge an EV at home (in which case it is not much at all). I would

So basically you are billed for about 1000kWh/month? That's not a small amount, unless you charge an EV at home (in which case it is not much at all). I would put a KillAWatt on the big consumers first, and run for a week. Then continue with the mid-consumers for a week, if it still doesn't add up.