Zero carbon electricity: Powering grids with wind and solar

This briefing by Zero Carbon Analytics argues that transitioning to zero-carbon electricity grids powered by wind and solar is technically and economically feasible. It debunks common myths regarding the need for fossil fuel backups and grid overloading, highlighting that stability can be achieved through flexibility solutions, digitalisation, and cross-border interconnectors. The document provides real-world examples from countries like Denmark, Portugal, and Namibia, while noting that insufficient investment in grid infrastructure remains a primary obstacle to a faster global rollout.

• Wind and solar power have seen dramatic cost reductions over the last decade, with wind costs falling by 55% and solar by 85% between 2010 and 2020. During the same period, the cost of batteries for storing variable renewable energy (VRE) also decreased by more than 85%.
• A significant barrier to the renewable energy transition is the lack of grid infrastructure investment. Approximately 3,000 GW of renewable power projects are currently awaiting grid connection across several countries, including the US, Spain, Brazil, Italy, Japan, the UK, Germany, Australia, Mexico, Chile, India, and Colombia. Of these, 1,500 GW are advanced wind and solar projects with connection agreements or active reviews.
• Scientific evidence and real-world data debunk the myth that wind and solar require fossil fuel backups for stability. Studies indicate that achieving 70% to 100% wind and solar energy in the grid is economically feasible. For example, in April 2023, Portugal generated over 50% of its electricity from wind and solar, which reduced fossil fuel generation by 24%.
• Excess renewable energy can be managed without overloading the grid through storage, heat pumps, flexible pricing, and cross-border interconnectors. Denmark utilizes six subsea connections to export electricity and is implementing dynamic line rating (DLR), which adjusts transmission capacity based on real-time weather to potentially increase capacity by up to 30%.
• Achieving energy system flexibility requires a four-pronged approach: supply-side flexibility (coupling different renewables), storage solutions (such as Norway's hydro reservoirs), demand-side flexibility (using EVs and heat pumps), and digitalisation via smart grids and AI. Implementing demand-side flexibility in Europe by 2030 could save consumers EUR 71 billion annually.
• Several nations are demonstrating the viability of renewable-heavy grids: Denmark's total renewables accounted for 77.24% of electricity generation in 2022; Namibia aims to connect 80% of its population to renewables by 2025; and Uruguay's wind and solar generation reached 35% in 2022, supported by annual infrastructure investments of approximately 3% of its GDP.
• European policy targets for grid decarbonisation vary: the EU aims for renewable and nuclear sources to provide over 90% of electricity consumption by 2040. Seven countries (Austria, Belgium, France, Germany, Luxembourg, the Netherlands, and Switzerland) committed to decarbonising their electricity sectors by 2035. In the UK, the government target is 2035, while the opposition Labour Party target is 2030.

APA

Team, Z. (2024). Zero carbon electricity: Powering grids with wind and solar. Zero Carbon Analytics. https://zerocarbon-analytics.org/insights/briefings/zero-carbon-electricity-powering-grids-with-wind-and-solar/

Chicago

Team, ZCA. Zero carbon electricity: Powering grids with wind and solar. Zero Carbon Analytics, 2024. https://zerocarbon-analytics.org/insights/briefings/zero-carbon-electricity-powering-grids-with-wind-and-solar/.

Wikipedia

{{cite report |last1=Team |first1=ZCA |title=Zero carbon electricity: Powering grids with wind and solar |publisher=Zero Carbon Analytics |date=20 March 2024 |url=https://zerocarbon-analytics.org/insights/briefings/zero-carbon-electricity-powering-grids-with-wind-and-solar/ |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{team2024zero, author = {Team, ZCA}, title = {{Zero carbon electricity: Powering grids with wind and solar}}, institution = {Zero Carbon Analytics}, year = {2024}, month = mar, url = {https://zerocarbon-analytics.org/insights/briefings/zero-carbon-electricity-powering-grids-with-wind-and-solar/}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }