Quote Originally Posted by oceanboy View Post
It is meant to leak
Approx 2.5litres a night for a 315L HWS.
Agreed. I have seen them fail and water with steam pouring off it run continuously out of the overflow pipe though. That sort of leaking will run up a big power bill very quickly.

There has to be something using huge amounts of power to get to 60+ kW/h per day. Just the downlights, two TVs and the usual household appliances isn't enough.