The 7 Best Clean Energy Stocks Under 5 Dollars To Buy This Year

With the rising adoption of solar power, wind energy, renewable fuels, energy storage, and other sustainable technologies, investments in clean energy stocks continue to attract attention.

The U.S. Energy Information Administration expects renewable sources to provide 25% of U.S. electricity generation in 2027, up from 21% in 2025. 

That long-term shift could create opportunities for clean energy companies. However, clean energy stocks under $5 come with added risk. 

Many are small companies that are still working toward steady profits and positive cash flow.

Here are the best clean energy stocks to buy now for under $5.

Best Clean Energy Stocks Under 5 Dollars

Fuel Tech, Inc. (NASDAQ: FTEK)

Overview

Fuel Tech develops environmental technologies for utilities and industrial facilities. 

Its systems help customers reduce harmful emissions, improve combustion, and manage water more efficiently.

The company operates across three main areas. Air Pollution Control provides equipment and engineering services that reduce nitrogen oxide emissions. 

FUEL CHEM uses chemical treatments to improve boiler performance and limit slag buildup and corrosion. 

Its newer Dissolved Gas Infusion business focuses on oxygen-transfer systems for water and wastewater treatment.

This mix gives FTEK exposure to several environmental markets rather than one renewable energy technology.

Growth Catalysts

Demand for emissions-control equipment remains an important driver as utilities and industrial operators work to meet environmental standards. 

New project awards can support growth, although results may vary from quarter to quarter.

The 2025 acquisition of Wahlco’s intellectual property and related operations also expanded Fuel Tech’s product range and industry relationships.

Dissolved Gas Infusion could provide another long-term growth path. 

The technology may serve municipal wastewater, food processing, aquaculture, and industrial water applications. 

However, this part of the business is still developing.

Conclusion

Fuel Tech offers a practical way to invest in cleaner industrial operations. 

Its established emissions business, broader technology portfolio, and relatively strong balance sheet support the long-term case.

The main risk is inconsistency. 

Project timing can cause uneven revenue, and steady profitability has remained difficult. 

FTEK is best viewed as a small, speculative environmental technology stock with several credible growth opportunities.

Enel Chile SA (NYSE: ENIC)

Overview

Enel Chile is one of the country’s largest electricity companies. 

Its operations cover power generation and electricity distribution, giving investors exposure to both energy production and a large base of utility customers.

The generation portfolio includes hydroelectric, solar, wind, and thermal power assets. 

This mix makes Enel Chile more established than many clean energy stocks under $5. It already owns operating infrastructure and sells electricity into a developed national market.

Folks from the U.S. can access the company through American depositary receipts listed on the NYSE.

Growth Catalysts

Chile’s move toward cleaner electricity should support demand for renewable generation over the long term. 

Enel Chile can benefit from this shift through its existing hydroelectric, solar, and wind assets.

The company is also investing in grid improvements and digital technology. 

A more modern distribution network could help it manage growing electricity demand and connect new renewable projects.

Electric vehicle adoption may create another opportunity. 

Enel has experience with charging infrastructure and other services linked to transportation electrification.

Conclusion

Enel Chile offers a more mature clean energy business than most penny stocks. 

Its operating power plants and distribution network provide a level of stability that early-stage technology companies often lack.

However, there are currency, regulatory, political, and weather-related risks here. 

Hydroelectric output can also change with rainfall levels. 

ENIC is a solid choice if you’re seeking renewable energy exposure with an established utility base.

Aemetis, Inc. (NASDAQ: AMTX)

Overview

Aemetis develops renewable fuels and technologies designed to lower emissions from transportation and agriculture. 

Its operations include low-carbon ethanol in California, biodiesel production in India, and renewable natural gas projects linked to dairy farms.

The company captures methane from animal waste and converts it into renewable natural gas. 

That fuel can be used in heavy-duty vehicles while reducing emissions that would otherwise escape into the atmosphere.

Aemetis is also developing sustainable aviation fuel, renewable diesel, and carbon capture projects. 

This gives it exposure to several parts of the clean fuel market.

Growth Catalysts

Renewable natural gas is one of the company’s clearest growth opportunities. 

Aemetis plans to connect more dairy farms to its pipeline network, which could increase the amount of fuel it produces and sells.

Its proposed sustainable aviation fuel and renewable diesel projects may also benefit from demand for lower-carbon transportation fuels. 

Airlines and large companies are under pressure to reduce emissions, yet aviation remains difficult to electrify.

The India biodiesel business provides another potential source of growth as the country works to reduce its dependence on petroleum imports.

Conclusion

Aemetis offers broad exposure to renewable fuels, but it is also one of the riskier stocks on this list. 

Its major projects require large investments, permits, financing, and successful construction.

Debt and possible share dilution are important concerns. 

AMTX may appeal to those who believe renewable fuels will gain wider adoption, but it should be treated as a speculative clean energy pick.

FTC Solar, Inc. (NASDAQ: FTCI)

Overview

FTC Solar designs solar tracker systems, software, and engineering services for utility-scale solar projects. 

Trackers move solar panels throughout the day, helping them follow the sun and generate more electricity than fixed systems.

The company’s products are designed to reduce installation work while handling different terrain and weather conditions. 

Its customers include solar developers, engineering firms, and project owners in the United States and other markets.

This gives FTC Solar direct exposure to the continued buildout of large solar farms.

Growth Catalysts

Demand for utility-scale solar remains the main growth driver. 

Developers need tracker systems that can improve power output while lowering construction and maintenance costs.

FTC Solar is also working to make project installation more efficient through software, automation, and simplified tracker designs. 

These improvements could help customers deal with labor shortages and rising project costs.

International expansion provides another possible growth path. 

Solar development is increasing in several regions where electricity demand is rising and large areas of land are available for renewable projects.

Conclusion

FTC Solar offers a focused way to invest in utility-scale solar infrastructure. 

Its technology plays an important role in helping solar farms produce more power from the same number of panels.

Still, the business can be unpredictable. 

Revenue depends on large projects that may be delayed by financing, permitting, supply-chain problems, or changing customer plans. 

FTCI is best viewed as a turnaround stock with meaningful potential but a high level of risk.

Clean Energy Fuels Corp. (NASDAQ: CLNE)

Overview

Clean Energy Fuels supplies renewable natural gas and other lower-carbon fuels to commercial vehicle fleets. 

Its customers include transit agencies, airports, delivery companies, waste operators, and heavy-duty trucking fleets.

Renewable natural gas is produced by capturing methane from sources such as dairy farms and landfills, which can then replace conventional natural gas in compatible vehicles.

The company has built a broad fueling network across North America. 

It is also developing its own renewable natural gas supply, creating a more integrated business from fuel production to distribution.

Growth Catalysts

Heavy-duty transportation is the main opportunity. 

Large trucks are difficult to electrify because they need long driving ranges, fast refueling, and the ability to carry heavy loads.

Renewable natural gas can use existing natural gas engines and fueling infrastructure. 

This may make it a practical option for fleets that want to cut emissions without waiting for battery or hydrogen technology to mature.

New fueling stations along major freight routes could support wider adoption. 

Producing more fuel through dairy and other organic-waste projects may also improve control over supply.

Conclusion

Clean Energy Fuels is one of the more established companies on this list. 

It already sells fuel through an operating network and serves customers with large commercial fleets.

The main risk is competition from electric and hydrogen vehicles. 

The business also depends on fuel credits, regulation, and fleet demand. 

Even so, CLNE offers a practical clean transportation story backed by real infrastructure.

EVgo Inc. (NASDAQ: EVGO)

Overview

EVgo develops and operates public fast-charging stations for electric vehicles. 

Its network serves individual drivers, rideshare operators, commercial fleets, and automakers across major U.S. markets.

Fast chargers can add a meaningful amount of driving range in a short visit. 

This makes them important for people who travel long distances or cannot charge at home.

The company earns money from charging sessions and also builds charging sites for business partners. 

This combination gives EVgo exposure to both network usage and the construction of new charging infrastructure.

Growth Catalysts

More electric vehicles on U.S. roads should increase demand for reliable public charging. 

Automakers are launching more models, while fleets and rideshare drivers need convenient charging to keep vehicles in service.

EVgo’s partnerships with automakers, retailers, property owners, and fleet operators could help it add locations in areas with strong demand. 

Its contract-based development business may also support expansion without requiring EVgo to own every station.

Better charger reliability and higher use at existing sites could improve the economics of the network over time.

Conclusion

EVgo offers direct exposure to the growth of electric vehicle infrastructure. 

Its large fast-charging network and industry partnerships give it a stronger position than many early-stage charging companies.

However, building and maintaining charging stations requires significant capital. 

Competition is also increasing, and profitability depends on higher charger use. 

EVGO remains speculative, but it has a clear role in the expanding U.S. electric vehicle market.

Energy Vault Holdings, Inc. (NYSE: NRGV)

Overview

Energy Vault develops systems that store electricity and release it when customers need it. 

Its technology portfolio includes battery storage, gravity-based storage, and green hydrogen solutions.

Energy storage helps solve a key problem with renewable power. 

Solar panels stop producing at night, while wind output changes with weather conditions. Storage allows excess electricity to be saved and delivered later.

The company provides equipment, software, engineering, and project management. 

It is also building a portfolio of storage assets that it can own and operate under long-term agreements.

Growth Catalysts

Rising solar and wind generation should increase the need for grid-scale storage. 

Utilities and large energy users need flexible systems that can balance supply, reduce grid pressure, and provide backup power.

Energy Vault’s technology-neutral approach is another potential advantage. 

Instead of relying on one storage method, it can design projects around a customer’s location, duration needs, and available infrastructure.

Owning and operating selected projects could also create recurring revenue. 

This may reduce dependence on one-time equipment sales as the asset portfolio expands.

Conclusion

Energy Vault offers broad exposure to one of the most important parts of the clean energy transition. 

Its mix of battery, gravity, hydrogen, and software solutions helps separate it from companies focused on a single product.

The main risks are project delays, high construction costs, and uneven revenue. 

The company must also prove that its newer technologies and owned assets can produce steady returns. 

NRGV remains speculative, but its long-term market opportunity is difficult to ignore.

Should You Invest in Clean Energy Penny Stocks?

Clean energy stocks could be an interesting choice if you want to invest in the future of power generation, transportation, and energy storage.

The long-term outlook for solar, wind, renewable fuels, and battery storage remains promising. 

Demand for cleaner energy is growing, and new projects could create opportunities for smaller companies in the sector.

Still, clean energy penny stocks can be highly volatile. 

Many have limited cash, high debt, or projects that have not yet reached commercial scale. Some may also issue new shares to fund growth, which can dilute existing investments.

Ultimately, a low share price does not always mean a stock is undervalued. 

It is important to review the company’s revenue, debt, cash flow, share count, and exchange listing before buying.

The clean energy market could grow further in the years ahead. 

However, you should judge each company on its financial strength and ability to turn demand into steady revenue.

Where to Buy Clean Energy Stocks Under $5

Clean energy stocks under $5 that trade on the Nasdaq or NYSE are available through many popular U.S. brokerage accounts.

You can search for a company using its ticker symbol. 

Before placing an order, confirm that the company name, ticker, and exchange match the stock discussed in the article. 

This is important because companies can change their names, move to another exchange, or receive a new ticker.

Popular brokers that offer access to U.S.-listed stocks include Robinhood, Fidelity, and Charles Schwab.

Robinhood

Robinhood offers commission-free trading for U.S.-listed stocks and exchange-traded funds. 

Its mobile-focused platform may appeal if you want a simple way to research and trade stocks. Other regulatory and account fees may still apply.

Not every low-priced security is available on the platform. Check the stock’s page before opening an account or transferring money.

Fidelity

Fidelity offers $0 commissions for online U.S. stock and ETF trades. It also provides research tools, stock screeners, educational resources, and mobile trading.

These tools may help folks compare a clean energy company’s financial results, valuation, and recent filings before buying shares.

Charles Schwab

Charles Schwab also offers $0 online commissions for listed U.S. stocks and ETFs. Its platform includes research, screening tools, and educational content for both new and experienced investors.

Its standard $0 commission does not apply to every type of security. For example, separate fees may apply to some over-the-counter stocks and broker-assisted trades.

Best Clean Energy Stocks Under 5 Dollars: Final Thoughts

There are plenty of potential winners in the clean energy sector; you just need to know where to look.

That being said, while clean energy itself looks like a stable investment, it won’t shield you from the ups and downs of the penny stock market.

Keep an eye on the charts to gauge volatility, and be sure to do extensive due diligence before picking up any green energy penny stocks.

Clean Energy Stocks to Watch FAQ

Check out our clean energy FAQ to find out our answers to the most common questions about clean energy stocks.

Is Clean Energy a Good Investment?

The bottom line is that fossil fuels are not sustainable.

At some point, they’re going to be phased out by some form of alternative fuel.

So investing in green energy companies could be a good investment if you’re looking to get in before the shift to alternative energy takes place.

Which Energy Stock Is Best to Buy Now?

If you’re looking for the best energy stock to buy now, you might want to check out Fuel Tech, Inc. (NASDAQ: FTEK).

It’s a fascinating example of a company repeatedly beating market expectations for four quarters in a row.

Are Solar Stocks Overvalued?

It’s likely that solar energy is going to support the transition from fossil fuels to renewables.

So while some stocks may be currently overvalued, solar energy stocks may have a bright future ahead of them.