Many renewable energy stocks ran out of juice over the past year as the Trump administration embraced fossil fuels and rattled the market with its divisive tariffs. However, that pullback might represent a golden buying opportunity if you expect the market's demand for renewable energy solutions to keep growing over the long term.

So if you're willing to tune out the near-term noise, these three renewable energy plays might generate some big returns from a modest $2,000 investment: NuScale Power (NYSE: SMR), Plug Power (NASDAQ: PLUG), and CleanSpark (NASDAQ: CLSK). All three of these stocks are speculative, but they could attract a lot more attention if they scale up their businesses.

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The nuclear play: NuScale Power

NuScale develops small modular reactors (SMRs) for nuclear power which can be installed in vessels that are only nine feet wide and 65 feet tall. Its SMRs are also prefabricated, delivered, and assembled on site. Those advantages make them cheaper and easier to deploy than traditional nuclear reactors.

NuScale's SMRs are the only ones that have received a standard design approval from the U.S. Nuclear Regulatory Commission (NRC), but that approval only covers its reactor clusters that generate up to 55 megawatts of electricity.

For a cluster of SMRs to be more cost-effective than a comparable coal-fired plant, it must generate at least 77 megawatts of electricity. NuScale expects the NRC to approve its 77 megawatt designs this year. Until then, it's generating most of its revenue as a subcontractor on a 462-megawatt power plant project for Romania's RoPower.

NuScale only generated $37 million in revenue in 2024, but analysts expect that figure to surge to $402 million in 2027. That growth could be driven by its new NRC design approvals, more contracts in the U.S., and the soaring energy needs of the booming data center market. With a market cap of $2.06 billion, NuScale already trades at 5 times its 2027 sales -- but it has plenty of room to grow over the next few decades.

The hydrogen play: Plug Power

Plug Power develops hydrogen fuel cell, charging, storage, and transport technologies. It's deployed more than 69,000 fuel cell systems and over 250 fueling stations across the world, and it's the single largest buyer of liquid hydrogen.

Amazon and Walmart, which are invested in Plug Power through stock warrants, are two of its top customers. The two retail giants both use Plug's hydrogen fuel cells to power the electric forklifts in their warehouses.

In 2024, Plug Power's revenue declined 29% to $629 million as its net loss widened from $1.4 billion to $2.1 billion. That slowdown was caused by macro headwinds, which curbed the market's demand for new hydrogen charging projects, and tough comparisons to the inorganic expansion of its smaller cryogenics business in 2022 and 2023.

But from 2024 to 2027, analysts expect Plug's revenue to grow at a CAGR of 32%. That growth could be driven by the stabilization of the hydrogen market, new contracts, and a $1.66 billion loan guarantee from the U.S. Department of Energy for the construction of six green hydrogen manufacturing plants.

Plug Power won't turn profitable anytime soon, but it's been cutting its costs and selling some of its equipment (and leasing it back) to narrow its net losses. With a market cap of $1.2 billion, it trades at just 1.6 times this year's sales -- so any positive developments might drive its stock a lot higher over the next few years.

The clean crypto play: CleanSpark

CleanSpark originally built modular microgrids for wind, solar, and other renewable energy sources. These microgrids can be deployed as stand-alone power systems or plugged into existing energy grids -- where they're used to transfer energy into storage systems, load management solutions, and backup generators.

But four years ago, it acquired the Bitcoin miner ATL Data Centers and upgraded its miners with its microgrids. It subsequently acquired more Bitcoin miners, upgraded their plants in the same way, and mined more Bitcoins. That clean energy approach arguably made it more appealing than its coal-powered competitors.

By the end of calendar 2024, CleanSpark was holding 9,952 Bitcoins -- which are worth $819 million as of this writing. That's 38% of its market capitalization of $2.1 billion. It also expanded its fleet by 127% year over year to 201,808 miners, which increased its operating hashrate (which gauges its mining efficiency) 288% to 39.1 EH/s (exahash per second).

From fiscal 2024 (ended last September) to 2027, analysts expect CleanSpark's revenue to grow from $379 million to $1.1 billion as it narrows its net losses. Assuming it matches those expectations, it still looks reasonably valued at 1.9 times its fiscal 2027 sales. It could certainly struggle if Bitcoin's price plunges, but it could outperform many other traditional Bitcoin miners if the cryptocurrency's price stabilizes, soars higher, and attracts more retail and institutional investors.

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John Mackey, former CEO of Whole Foods Market, an Amazon subsidiary, is a member of The Motley Fool's board of directors. Leo Sun has positions in Amazon. The Motley Fool has positions in and recommends Amazon, Bitcoin, and Walmart. The Motley Fool recommends NuScale Power. The Motley Fool has a disclosure policy.

As artificial intelligence use cases grow, the demand for energy from data centers is set to skyrocket. This ever-increasing need for power opens doors for innovative energy solutions, and nuclear energy is rapidly coming back in favor, backed by nations eager to embrace it.

Enter NuScale Power (NYSE: SMR), an innovator in advanced small modular reactors that could revolutionize how nuclear energy is distributed. These compact reactors promise efficient deployment and could help reduce the cost of deploying nuclear power. Could investing in NuScale be your ticket to millionaire status? Let's explore the company and its opportunity to find out.

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NuScale's nuclear innovation

Small modular reactors (SMRs) are cutting-edge technology that could change nuclear power generation as we know it. Founded in 2007, NuScale designs compact SMRs that could provide a scalable, efficient, and safer alternative to traditional nuclear plants.

Its NuScale Power Module is the first SMR to receive a standard design approval from the U.S. Nuclear Regulatory Commission (NRC), giving NuScale a critical first-mover advantage over peers. The NRC has approved its 50 megawatt-electric (MWe) design, and NuScale is looking to upsize that reactor to 77 MWe and expects this larger version to receive approval sometime this year. Up to 12 modules can be assembled per plant, providing up to 924 MWe in energy.

NuScale has significant backing from Fluor, a construction company that provides services across industries, including energy. Since 2011, Fluor has invested over $600 million in NuScale to support its development and has been instrumental in helping NuScale bring its VOYGR power plant to the market.

What's next for NuScale Power

NuScale is looking to build its plants efficiently and is targeting existing coal plants, which could save up to 15% to 35% on construction costs. With Fluor's help, NuScale is developing a small modular reactor power station at a former coal plant in Doicești, Romania. This project is known as the VOYGR-6 SMR power plant and will consist of six NuScale Power Modules and generate 462 megawatts of electricity.

The project is backed by public and private funding, including contributions from the United States, Japan, South Korea, and the United Arab Emirates. The U.S. Export-Import Bank has committed up to $99 million for initial work, with additional funding of up to $4 billion being considered for the project's deployment.

Image source: Getty Images.

Investors should consider the following

NuScale's technology is exciting, but investors shouldn't ignore the risks of buying the stock. For one, the company continues to rack up losses as it works to get its technology approved and build its facilities. Over the last 12 months, NuScale has lost $137 million against $37 million in revenue. In the fourth quarter, the company bolstered its balance sheet with $446.7 million in cash -- providing it with a runway for the next few years.

Second, it will take several years before NuScale achieves widespread commercial operations. The target date for opening its Romanian plant is 2029, and four years is a long time when things could go wrong. Any cancellations (such as with its UAMPS project a couple of years ago), delays, or a lack of customer interest would be detrimental for the stock.

Is NuScale Power a millionaire-maker stock?

NuScale Power has long-term potential and could be a key player in helping countries deploy nuclear power on a large scale. Over the past few years, 31 countries have signed a Declaration to Triple Nuclear Energy by 2050. If NuScale's products work well and prove cheaper and more efficient, it could grow tremendously.

NuScale certainly has millionaire-maker potential once it gains footing, but it remains highly speculative at this point, leaving it best suited for aggressive investors. Even so, those wishing to own the stock should maintain a small position as part of a more extensive, diverse portfolio and build up that position over time as NuScale reaches key milestones and works toward commercial operations at scale.

Should you invest $1,000 in NuScale Power right now?

Before you buy stock in NuScale Power, consider this:

The Motley Fool Stock Advisor analyst team just identified what they believe are the 10 best stocks for investors to buy now… and NuScale Power wasn’t one of them. The 10 stocks that made the cut could produce monster returns in the coming years.

Consider when Nvidia made this list on April 15, 2005... if you invested $1,000 at the time of our recommendation, you’d have $590,231!*

Stock Advisor provides investors with an easy-to-follow blueprint for success, including guidance on building a portfolio, regular updates from analysts, and two new stock picks each month. The Stock Advisor service has more than quadrupled the return of S&P 500 since 2002*. Don’t miss out on the latest top 10 list, available when you join Stock Advisor.

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Courtney Carlsen has no position in any of the stocks mentioned. The Motley Fool recommends NuScale Power. The Motley Fool has a disclosure policy.