Having a toggle to switch between two sets of values (power and energy) would be useful, but that’s not how I understood you.
I’m saying having e.g. grid usage reported as kWh (energy) while seeing home consumption as kW (power) would be confusing in the same view. If you have both values for all elements, then yes, that would be useful – or a toggle to switch values, as I said above.
One way to do this would be to have both a power and energy card and put that in a swiper card.