That just means that you can't max out all your circuits at the same time. I'm pretty sure that's considered normal. If instead of FIR panels you use a heat pu

That just means that you can't max out all your circuits at the same time. I'm pretty sure that's considered normal. If instead of FIR panels you use a heat pump (isn't that the main point of electrical heating), would you still need 32A? And if you're cooking and baking with 10 kW, would you still need heating at the same time? And a 7 kW heat pump water heater should give you ~10 liters per minute of hot shower water. Seems like any automatic system that could make sure not all high-draw consumers get turned on at the same time would be enough. It does mean that if someone is taking a shower while two people are vacuuming with all the lights on and the kitchen is cooking up a feast, you wouldn't be getting any additional heat or electric car charging, for the hour or so that such high demand can last, but that doesn't seem to be a serious problem (especially as this would only affect older houses). And you said it's required for new construction, so I assume they'd be putting in 3-phase for those. The main power lines for the whole street could be a problem, so yes, this may require some new construction. Might as well put down FTTH while at it. Additionally, if houses add solar, it should reduce typical demand on the grid, as a lot of the current wouldn't have to flow all the way from some substation but would be supplied either within each house or from neighbors.