Double an ioniq 5's miles per kw/h to 8m/kWh, use the maximum possible insolation (1kw/m^2) and theoretical PV efficiency (70%, reality is 30% btw) and you get... 8kw/h@12hrs a day generated and 3.75kwh needed. about double what this impossibly optimistic calculation gives. Half all the inputs and double the consumption and you get a quarter of the power needed.