9 Best Green Energy Penny Stocks to Invest In

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6. ESS Tech Inc (NYSE:GWH)

Stock Price: $1.13

Number of Hedge Fund Holders: 8

Upside Potential: 119.30%

ESS Tech Inc (NYSE:GWH) is one of the best green energy penny stocks to invest in. According to Street forecasts, GWH stock could soar more than 100% from its current level.

ESS Tech Inc (NYSE:GWH) reported its Q1 2026 results on May 7. The report showed the company generated $128,000 in revenue, compared with $0.6 million in the same period the prior year. The management said the revenue decline was due to the company delivering fewer equipment to customers compared to the prior-year period.

However, ESS Tech’s net loss narrowed to $15.9 million from $18 million in the prior-year period. Moreover, the company’s financial position improved, with the management revealing $21.5 million in total liquidity.

Looking ahead, ESS Tech CEO Kate Suhadolnik said the focus remains on expense control and financial flexibility to support the company’s operational and commercial priorities. ESS Tech has secured a $9.9 million contract for a large energy storage system to support a US Air Force research lab operation.

As it seeks additional business opportunities, ESS Tech is expanding beyond its traditional long-duration energy storage market segment. On April 30, ESS Tech announced a strategic partnership with Alsym Energy to enable it to enter the short and medium-duration energy storage segment.

ESS Tech Inc (NYSE:GWH) provides energy storage solutions. Its technology supports energy security, reliability, and resilience. The company helps its customers get the most out of excess energy. ESS Tech was formed in 2011 and is based in Oregon.

While we acknowledge the potential of GWH to grow, our conviction lies in the belief that some AI stocks hold greater promise for delivering higher returns and have limited downside risk. If you are looking for an AI stock that is more promising than GWH and that has 100x upside potential, check out our report about the cheapest AI stock.

Click to continue reading and see the 5 Best Green Energy Penny Stocks to Invest In.

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