I'm aiming to draw over 20kw/hr peak (12kw/hr continuous) on my Power Shout tomorrow (6pm to 10pm). The preferred store of power I use is the concrete slab heating.
Better use it before I lose it - July will end soon.
If there was no free hours of power, what would you use?
My point is you might use a lot of free power, but in real life you only save what you would normally have used.
My one hour daily with EK, the HW both elects are on (have solar HW). Dishwasher and washing machine if there is a lot, both are not daily. Turn heatpumps up then turn off. That saves me power of two heat pumps (at usual temp) for one hour, plus 1-2 hours after as well.