''When solar factories can produce a significant amount of electricity after the sun sets and wind factories can do the same on a still day then your renewables can be “legitimately compared” to nuclear or fossil fuel energy generation.''
well, they already can be compared ------- without solar producing at night and without wind 24/7
any system that uses solar and wind and fossil backup - each input can be compared
easy
it is very very very clear that your 'engineering' degree was very very very lacking
Even a small system - say to power a house - can be off grid and have solar and wind and back up generator - diesel or petrol
each input can be measured accurately and the result seen over any chosen period - day, week, month, year
true comparisons on usage are very easy to display
