We moved into a new house recently and for electricity it has day rate meter and a separate Night Rate meter which used to be hooked up to the hot water cylinder. The previous owners got the hot water cylinder hooked up to the day rate because they had lots of people in the house at one point and need more hot water its a 300l cylinder. Anyway long story short we are going to get the hot water hooked back up to the night rate meter at some point but I was wondering if there was a way that the whole house could move over to the night rate when there was power and then switch back to normal rate when there wasnt any power coming out of the night rate meter? Because we signed up with Meridian when moving we are locked into a 12 month contract. I dont really want to go down the route of changing to Flick or the likes because at the moment I don't really have enough time to be analyzing power usage throughout the day and working out when its best to put the dishwasher on etc. Essentially what I want is:
1. Power to the house during the day on day rate meter
2. At night when there is power to the night rate meter switch the house over to the Night Rate.
3. Hot water cylinder only runs on the night rate meter.