Solar electricity every hour of every day is here and it changes everything

This report by Ember analyzes the technical and economic feasibility of achieving 24-hour solar electricity generation using solar panels paired with battery storage. It demonstrates that in sunny regions, near-continuous solar power is now cost-competitive, often cheaper than new coal or nuclear power, due to rapid declines in battery costs and the adoption of Lithium Iron Phosphate (LFP) technology.

• In sunny locations like Las Vegas, providing a stable 1 kW of round-the-clock power on an average day requires 5 kW of fixed solar panels and a 17 kWh battery.
• The sunniest cities can achieve very high reliability for 24/365 solar generation; for example, Muscat in Oman can reach 99% and Las Vegas can reach 97% using a configuration of 6 GW of solar panels and 17 GWh of battery storage to deliver 1 GW of continuous supply.
• The Levelised Cost of Electricity (LCOE) for achieving 97% of 24/365 solar generation in sunny regions is estimated at $104/MWh, which is 22% lower than the estimate from one year prior and is more cost-effective than new coal ($118/MWh) and nuclear ($182/MWh).
• Battery costs have declined sharply, with average global prices falling 40% in 2024 to $165/kWh. Some specific tenders in Saudi Arabia for Tabuk and Hail have reported prices as low as $72/kWh.
• Integrating batteries can significantly reduce grid expansion costs by allowing up to five times more solar capacity to be installed behind a single grid connection, effectively pushing the annual capacity factor from 20% toward 100% round-the-clock supply.
• Lithium Iron Phosphate (LFP) batteries have largely replaced Nickel Manganese Cobalt (NMC) in the grid storage market because they are cheaper, safer, and more durable, with some manufacturers offering 20-year warranties.

APA

Rangelova, K., & Jones, D. (2025). Solar electricity every hour of every day is here and it changes everything. Ember. https://ember-energy.org/app/uploads/2025/06/Ember-24-Hour-Solar-Electricity-June-2025-6.pdf

Chicago

Rangelova, Kostantsa, and Dave Jones. Solar electricity every hour of every day is here and it changes everything. Ember, 2025. https://ember-energy.org/app/uploads/2025/06/Ember-24-Hour-Solar-Electricity-June-2025-6.pdf.

Wikipedia

{{cite report |last1=Rangelova |first1=Kostantsa |last2=Jones |first2=Dave |title=Solar electricity every hour of every day is here and it changes everything |publisher=Ember |date=21 June 2025 |url=https://ember-energy.org/app/uploads/2025/06/Ember-24-Hour-Solar-Electricity-June-2025-6.pdf |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{rangelova2025solar, author = {Rangelova, Kostantsa and Jones, Dave}, title = {{Solar electricity every hour of every day is here and it changes everything}}, institution = {Ember}, year = {2025}, month = jun, url = {https://ember-energy.org/app/uploads/2025/06/Ember-24-Hour-Solar-Electricity-June-2025-6.pdf}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }