I have 3 phase grid connection, on phase powers four 4.5kW slab elements. Other phases power the house including 2 A/C units. Last year Origin replaced our analogue meter with TOU Interval meter. Consumption has almost doubled to 21.09kW but no new electronics in house.
Looking to cut costs by dropping off-peak supply to slabs all together, moving it to new solar installation. The offpeak controlled load now barely heats the two slabs during the week, dumping power on weekend. All slabs are turned off as soon as things warmup. Are there suppliers who can design a solution, switching slab phase back into the house for summer & back for winter.