Why Energy Taxes Alone Cannot Drive Renewable Adoption

To support the energy transition, a mix of technological progress and policy is needed. This is because research can create cheaper and more efficient renewable energy systems, which will determine the baseline expectation for returns on capital invested in these energy generation capacities.

But only a stable framework, pricing carbon emissions fairly, and equally stable expectations for regulations and subsidies can provide the context in which investment returns can be calculated.

As such, we can expect the adoption of renewables by companies to be driven not just by technical specifications, but also by environmental energy taxes and the broader “green regulatory framework.

A new study by Sabrina Ruberto, a researcher at the University Magna Graecia of Catanzaro (Spain), investigates that connection.

It found that energy taxes promote firms’ renewable energy adoption, with a stronger effect for large firms and those in high-income countries. It also discovered that Institutional quality is the key catalyst for energy tax effectiveness.

The study was published in Energy Policy¹, under the title “Firms’ renewable energy adoption and energy taxes: How institutional quality matters”.

Renewable Adoption As A National Priority

With both a climate and energy crisis looming, adoption of renewables has been moving from a political question to a strategic one. Successful renewable adoption will likely be linked to long-term stability and economic growth, making it increasingly central to national policy and strategy.

“Expanding the use of renewable energy contributes to energy security, supports the transition toward a more sustainable energy system, reduces greenhouse gas emissions, and improves energy efficiency, thereby fostering long-term economic growth.”

Overall, a lot of progress has been made in convincing the public to shift to renewables, with many people having installed small solar installations, often combining them with EVs. But the bulk of power consumption is often from the corporate sector, especially large energy consumers like logistics & transportation, heavy industries, etc. So these companies form a key part in reaching the national goal regarding renewable adoption.

As a rule, mandates and constraining rules can achieve some results, but willing and enthusiastic adoption will ultimately determine the level of renewable penetration in the corporate sector.

“While traditional command-and-control regulatory measures (such as emission caps) and voluntary programs are widely used, market-based mechanisms – particularly environmental taxes – are recognized in environmental economics as more cost-effective instruments. ”

Still, very little is known about how institutional quality conditions firms’ responses to these fiscal instruments; hence he need for more data, which this study provides.

Environmental Taxation Effects

Institutions Matters

The theory says that the net effect of environmental taxation on firms’ behavior is  can be explained by two competing economic paradigms:

• The Porter hypothesis: properly structured environmental regulations and fiscal measures can stimulate corporate innovation, optimize resource use, and enhance production efficiency.
• Neoclassical economic theory: environmental taxes impose severe compliance costs and administrative burdens that reallocate a firm’s finite resources away from productive operations and R&D

Of course, only if the Porter hypothesis is correct can we expect environmental taxes to result in long-term economic growth and prosperity. Interestingly, which of these two ideas dominate in real life might be directly connected to the quality of institutions in a given country.

Strong institutions characterized by robust rule of law, strict control of corruption, and high voice and accountability may improve the enforcement credibility of tax policies, reduce regulatory uncertainty, and prevent tax evasion.

Conversely, in weaker institutional environments, high transaction costs and policy uncertainty may cause firms to opt for short-term compliance or evasion rather than structural technological upgrading.

Finding The Right Data

To analyze this topic properly, a cross-comparison between countries is needed. The study analyzed 28,000 firms surveyed via the World Bank Enterprise Surveys (WBES) between 2018 and 2020, a sample covering transition and developing economies across Eastern Europe, Central Asia, and the Middle East and North Africa.

The data were collected through face-to-face interviews and encompassed different business areas like the structure of the firms, infrastructure and services, management practices, degree of competition, innovation, access to finance, business environment, performance, and the green economy.

In parallel, the study used data from the Environmental Performance Index, based on 40 performance indicators across 11 issue categories, ranking 180 countries on climate change performance, environmental health, and ecosystem vitality, providing a measure of how close nations are to environmental policy targets.

Finally, the indicator of Institutional Quality (IQ) was drawn from the Environment, Social, and Governance (ESG) World Bank Database.

Study Initial Findings

The first result of this study is that, unsurprisingly, energy taxes are associated with firms’ renewable energy adoption.

Regarding firms’ characteristics, larger, older, family-owned, participating in global value chains, having structured management practices, and investing in human capital are attributes positively associated with the adoption of renewable energy.

Another factor to take into account is the availability of capital. Credit constraints were negatively associated with the propensity of firms to adopt renewable energy sources. This makes sense as even if profitable, investment in renewables tends to be “front loaded”, requiring a lot of money at first and then recuperating the money on this investment over many years.

How Taxes Impact Renewables

One of the first ways tax policies impact the attitude of companies toward renewables is through their R&D strategy. Firms facing energy taxes may respond by increasing their investments in R&D, particularly in areas aimed at improving energy efficiency and integrating renewable energy solutions

Another channel for taxes to impact company policies is through strategic orientation. They can make companies take environmental considerations within their broader strategic goals, reflecting a proactive stance towards climate-related challenges.

Lastly, quality and environmental management standards can also impact companies’ decision-making. Energy taxes may incentivize firms to pursue internationally recognized quality certifications, which often require or promote the adoption of sustainable practices (ISO, etc.).

The study data show that energy taxes are actually associated with all three effects: R&D engagement, adoption of strategic environmental goals, and the pursuit of internationally recognized quality certifications.

Renewables And Institutional Quality

In general, the efficiency of tax policy in pushing toward renewable adoption is directly correlated to the level of development of a country. For more affluent economies, renewable energy adoption is stronger.

Source: Energy Policy

A key reason is that development is also tied to institutional quality.

“Weak monitoring mechanisms and pervasive corruption appear to attenuate the effectiveness of energy taxes, diluting their capacity to properly incentivize corporate renewable energy adoption. When regulatory enforcement is lax, firms actors tend to perceive these taxes merely as an avoidable administrative cost rather than a strategic signal to alter their operational behavior.”

Quality of institutions can be defined along a few metrics:

• Rule of Law.
• Control of Corruption.
• Regulatory Quality.
• Government Effectiveness.
• Voice and Accountability.

Of thee factors, higher control of corruption (COR), greater voice and accountability (VOICE), and stronger legal enforcement (ROL) are the most impactful on improving adoption of renewables.

Source: Energy Policy

Investors Takeaways

The expectation that renewable adoption can turn into a durable competitive advantage is tied to environmental taxes performing as intended. In general, it appears that institutional quality is a major factor in making it happen.

In poorly regulated business environments, companies might be tempted to avoid environmental taxes through false declarations, corruption, or other negative behaviors. This can, in turn, make the company lag in R&D and adoption of low-carbon emissions, which will turn into a disadvantage in the international market as environmental standards tighten.

This also means that the strongest demand for renewable energy solutions will be found in the context established by this study: high quality of institutions, larger firms participating in global supply chains, and good access to capital.

This finding can make relatively more predictable the pattern of adoption of microgrids, corporate solar, and battery storage, as well as if and how much new environmental taxes will boost sales for these products.

Investing In Renewable

Eaton

Eaton is a major multinational intelligent power management company that provides sustainable energy solutions across the electrical, industrial, aerospace, and mobility sectors. Its largest market is electrical solutions (>75% – more than half of its business in the Americas), which is generating the bulk of the company’s profits.

Source: Eaton

In the electrical segment, data center and commercial sectors are the largest sub-sections. In data center specifically, orders in Q2 2026 were up approximately 85% and revenue up approximately 65% versus 2Q25.

This explosion in sales is largely tied to power grids being unable to deliver the required power to new data centers, making microgrids and energy storage that much more attractive.

Source: Eaton

Meanwhile, Eaton is also helping utilities harden the grid by selling its products to leading distribution utility infrastructure and digital edge control solutions.

The company also recently launched its xStorage battery energy storage system in North America to accelerate electrification and decarbonization.

“The xStorage BESS provides an environmentally friendly backup, reducing reliance on traditional generators with its 250 to 1000 kWh of usable stored energy. Additionally, it enables efficient solar self-consumption by storing excess energy from on-site sources like solar panels”

Aerospace, the other major segment besides electric, is carried by the sales of fuel, hydraulic, and electrical power solutions for commercial and military aircraft, with many new military platforms providing future growth opportunities (T-7Q, CH-53, FLRAA, etc.).

Source: Eaton

Eaton has been growing quickly, with a target of 6-9% organic revenue CAGR from 2024 through 2030, to which will be added ~$21B of additional acquisition capacity through 2030. This growth is carried by several “megatrends”: digitalization, electrification, reindustrialization, and sustainability. In total the company expects to grow its total revenues to $38B by 2030s from $27.4B in 2025.

Overall, Eaton has been obtaining this strong position through massive investment in R&D and capex ($12B since 2015) before these trends became “popular”. In total, the company employs 11,000+ engineers, owns 12.000 granted patents, and has established 200+ technology partnerships. This results in products using innovative materials like silicon carbide in power backups or lighter 3D-printed aircraft components.

With its strong position in areas of high institutional quality like the USA, Eaton is well positioned to benefit from the trend of electrification and decarbonization, as well as growing military budgets, all while also enjoying the boom in data center construction and providing hyperscalers with solutions to the energy bottleneck.

Latest Eaton (ETN) Stock News and Developments

Study Referenced

^{1. Sabrina Ruberto. Firms’ renewable energy adoption and energy taxes: How institutional quality matters. Energy Policy. January 2027. Article: 115631. Volume 220. 10.1016/j.enpol.2026.115631}