By 2042, solar energy will cost half or less of what fossil-fuel based alternatives do.

Created by JoshuaZ on 2015-08-15; known on 2042-01-01

• JoshuaZ estimated 55% on 2015-08-15
• JoshuaZ said “See http://predictionbook.com/predictions/130329 for 2025. ” on 2015-08-15
• btrettel estimated 50% on 2015-08-16
• moridinamael estimated 10% on 2015-08-17
• sflicht estimated 50% and said “I suspect it depends how one measures. It’s virtually certain that the generation costs will be very low. http://bit.ly/1IIrSfL But I’m less confident about grid level costs; a bear case is at http://bit.ly/1IpSaGo” on 2015-08-25
• sflicht estimated 50% on 2015-08-25
• Raahul_Kumar estimated 80% and said “Solar power is falling in price fast. Fossil fuels are running out and the remaing reserves are expensive to extract.” on 2015-09-25
• JoshuaZ estimated 76% on 2020-06-12