For more than a decade, a familiar argument has echoed through political speeches and policy debates: wind and solar power are unreliable, require costly backup systems, and ultimately make electricity more expensive. From Washington to Westminster, critics of clean energy have repeatedly framed renewables as an economic burden rather than a solution.
But a growing body of real-world data tells a very different story.
An extensive analysis of electricity markets across the United States, the European Union, Australia, and India shows that high penetration of wind and solar is not associated with higher power prices. “In many cases, it is linked to below-average electricity costs, directly challenging the claim that renewables drive up consumer bills,” according to an analysis, titled The myth of renewables pushing up power prices, by Zero Carbon Analytics.
The claim versus the evidence
Opponents of renewable energy often argue that variable sources like wind and solar require “parallel systems” of fossil-fuel backup, making the overall grid more expensive. This argument has been voiced at the highest levels of politics.
In a September 2025 speech to the United Nations, US President Donald Trump described wind power as the “most expensive energy ever conceived” and said renewables are “unreliable” and “too expensive.” Similar claims have been made in the UK, where Conservative Party leader Kemi Badenoch argued that renewables and decarbonisation policies are “driving up the cost of energy” .
However, when electricity prices are examined alongside generation data, these assertions do not hold up.
“Claims that renewables drive up total costs are unsubstantiated when looking at hard data from numerous markets,” the report notes. In regions leading the transition to wind and solar, end-user electricity prices have “in most cases not climbed any faster than in places still more dependent on fossil fuels”.
Renewables versus fossil fuels: a cost reality check
At the level of generation economics, the advantage of renewables is already clear. According to the International Renewable Energy Agency (IRENA), nine out of ten new grid-scale renewable projects in 2024 produced electricity more cheaply than the cheapest new fossil-fuel alternatives.
Onshore wind now has the lowest average levelised cost of electricity (LCOE) globally at USD 0.034 per kWh, followed by solar photovoltaics at USD 0.043 per kWh. Power from new onshore wind farms is 53% cheaper than the most affordable fossil-fuel-based alternatives, IRENA reports.
Crucially, renewables paired with battery storage are also approaching cost parity with fossil fuel generation in key markets—undermining the argument that intermittency automatically means higher system costs.
The United States: cheaper power where renewables lead
In the world’s largest electricity market, the data is striking. Most US states with above-average shares of wind and solar in their electricity mix also have below-average residential power prices.
In the first nine months of 2025, three states—Iowa, South Dakota and New Mexico—generated more than 50% of their electricity from wind and solar. All three had household electricity prices below the national average. Among the ten US states with the lowest residential electricity tariffs, seven have above-average renewable integration, including Oklahoma, one of the country’s wind power leaders. The few exceptions—Louisiana, Arkansas and Washington—reflect local market dynamics rather than renewable costs.
California and Hawaii are often cited as counter-examples: both have high renewable shares and high electricity prices. But the report stresses that renewables are not the main driver.
In Hawaii, high prices stem largely from reliance on expensive imported petroleum. In California, electricity bills are pushed up by “significant and increasing wildfire-related costs” and grid infrastructure spending, according to the state’s Legislative Analyst’s Office .
Notably, despite these high absolute prices, electricity price inflation in both states has been well below the national average in 2025. While US residential prices rose 4.9% year-on-year, prices in California remained flat even as wind and solar shares increased by 5.8 percentage points. In Hawaii, residential prices fell 6.6% as renewable penetration rose further.
A separate study by Lawrence Berkeley National Laboratory reinforces this picture, finding that US power generation costs declined in real terms between 2019 and 2024, with rising bills driven instead by grid upgrades, supply-chain constraints and climate-related damage—not renewables.
Europe: breaking the link between gas and power prices
In the European Union, where the energy transition is further advanced, the relationship between renewables and prices is even clearer.
Most EU countries with above-average shares of wind and solar have below-average household electricity prices (pre-tax). Denmark, a global leader in variable renewables, exemplifies this trend.
The reason lies in how electricity markets work. In Europe, wholesale prices are set by the most expensive generator needed at any given moment—often fossil gas. In 2022, gas set day-ahead electricity prices around 60% of the time, despite supplying only 20% of electricity, according to the International Energy Agency (IEA).
As wind and solar expand, fossil fuels are needed less often, reducing their ability to dictate prices.
Spain offers a powerful case study. Wind and solar accounted for 44% of Spain’s electricity generation in the first half of 2025, compared to 31.4% across the EU. As a result, fossil fuels set Spanish power prices only 19% of the time, down from 75% in 2019. Spain’s wholesale electricity prices were 32% lower than the EU average during this period.
These savings reached consumers. Spanish households paid an average of EUR 0.18 per kWh, 13.1% below the EU average in early 2025.
The IEA estimates that EU consumers saved around EUR 100 billion between 2021 and 2023 due to new wind and solar replacing expensive fossil fuel generation—and that savings could have been 15% higher with faster deployment.
India: early transition, emerging signals
India’s power system remains dominated by coal, which supplied 73.6% of electricity in 2024, according to Ember. At this stage, the report finds no clear nationwide relationship between renewable penetration and power prices, largely because many states still have negligible wind and solar capacity.
However, early signals are emerging. In Rajasthan, where renewable deployment is more advanced, the average price paid by distribution utilities is below the national median.
A peer-reviewed study in the journal Energy Policy suggests that rising renewable integration in Madhya Pradesh could reduce power purchase costs by up to 11%, with savings increasing as demand grows and technology costs continue to fall.
Australia: complexity, but clear daily signals
Australia presents a more complex picture. In the third quarter of 2025, renewables-laggard Queensland recorded the lowest wholesale prices, while renewables-leader South Australia recorded the highest.
But the report stresses that South Australia’s high prices predate its energy transition, which only accelerated around a decade ago. Structural issues—such as a concentrated market for “on-demand” electricity and limited transmission—play a major role.
Daily data tells a different story. When wind and solar make up a large share of South Australia’s electricity mix, prices tend to fall. On days when renewables exceed 85% of generation, wholesale prices sometimes turn negative, reflecting abundant low-cost supply.
Looking ahead, Australia’s Energy Market Commission expects national residential electricity prices to fall by around 5% by 2030—but warns that prices could rise again if renewable deployment slows.
What the global data really says
Across markets with vastly different political systems, grid structures and fuel dependencies, one pattern is consistent: renewables are not driving up electricity prices.
“There is ample evidence that renewables have shielded consumers from energy price spikes during global crises,” the report points out. With the cost of wind, solar and battery storage continuing to fall, countries have an opportunity to build more resilient, affordable and stable electricity systems—provided supportive policy frameworks are in place
The myth that renewables make power expensive persists in political rhetoric. The data, however, tells a quieter but far more compelling story—one where clean energy increasingly acts as a buffer against volatility, rather than its cause.