Solar and batteries can power the world

Solar and batteries can power the world argues that photovoltaic panels paired with battery storage are economically viable for global energy needs, a claim that earned 125 points and 123 comments on Hacker News. Feasibility debates aside, the piece notes that solar plus storage costs have dropped 40% since 2020, making them cheaper than the average fossil-fuel plant in 70% of regions. This data-led optimism contrasts with slower adoption rates #3 on the list, showing that technical hurdles are shrinking faster than skeptics assume.