you don't even want to aim for the same energy. With pure solar you need to aim for about 4x nominal output in order to approximately match the utility of something that meets that nominal output at essentially any time like, for example, a natural gas plant. We make about 1.2 giga-gallons of ethanol per year [1] (phew quite a unit, there). A gallon of ethanol has something like 76k BTU/gallon[2]. When we burn Ethanol in an ICE we can usefully extract about 25% of it's energy into rotation. That leaves us with about 5.5 kwH of useful energy per gallon of ethanol. If my orders of magnitude aren't wrong that's something like 6.6 twH which isn't that crazy, considering last year the US make something like 300twH in utility scale solar output. so maybe an additional 25% addition to our solar production.

[1] https://www.eia.gov/petroleum/ethanolcapacity/ [2] https://afdc.energy.gov/files/u/publication/fuel_comparison_...