Solar will be a very viable alternative off in the future. It works fine for small applications now like homes and signalling systems. Railroads have used solar to power field signals for over 20 years with great reliability. A lot more work is needed and will it ever replace fossil fuels to power cities, no. Fossil fuels provide jobs, and still work. This administrations approach to implement solar and alternative sources by forcing us off fossil is ridiculous and bankrupting us.