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Funding and M&A Roundup: Solar Module Manufacturer HELIUP Raises $19 Million

Energy Vault closes $150 million convertible senior notes

March 11, 2026

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From: Mercom Capital Group

HELIUP, a solar module manufacturer for large rooftops of commercial and industrial buildings, closed a €16 million (~$19 million) funding round. Supernova Invest led the funding round. Supernova Invest led the funding round, alongside new investors including MAIF Impact, Lita Gestion, C2AD, as well as existing partners Starquest Capital and BNP Paribas Développement. Avolta Partners supported HELIUP in structuring and implementing the transaction.

Energy Vault, a utility-scale energy storage project developer, announced the closing of an upsized $150 million financing in convertible senior notes against the initially announced $125 million offering. According to Energy Vault, the transaction will enhance the company’s liquidity and financial flexibility while supporting its strategic expansion into higher-margin infrastructure verticals.

Photoncycle, a hydrogen-based energy storage solutions provider, raised €15 million (~$17 million) in a Series A funding round, led by NordicNinja, a Japan-backed venture capital fund in Europe, and Voima Ventures, a Nordic venture capital firm. According to the company, the funding will be used to scale manufacturing and support early commercial deployment in Denmark, followed by entry into the Netherlands.

Qnetic, a company developing long-duration flywheel energy storage systems (FESS), raised $5 million in a recent funding round. Combined with a $2.1 million equity crowdfunding campaign completed last year, the company has secured a total of $7.1 million in funding over the past 12 months. According to Qnetic, the newly raised capital will be used to support fitting out its California manufacturing facility for low-volume production of its Q500 FESS.

Torrent Power, a power utilityraised ₹20 billion (~$216.58 million) through private placement of secured, non-convertible debentures (NCDs). The debenture issue comprises 200,000 NCDs, each with a face value of ₹100,000 (~$1,083), carrying a coupon rate of 7.97% per annum. These debentures will be listed on the wholesale debt segment of the National Stock Exchange of India.

Infrastructure debt fund IL&FS Mutual Fund committed an investment of ₹1.25 billion (~$13.63 million) in Hero Solar Energy, part of renewable energy developer Hero Future Energies, to refinance its debt and support the expansion of its renewable projects. Hero Solar Energy will issue secured debentures to IL&FS to facilitate the deployment of long-term capital.

Holyvolt, a renewable energy technology company, completed the acquisition of Wildcat Discovery Technologies, a company developing nickel- and cobalt-free cathode materials for batteries used in energy storage and electric vehicles. The acquisition is expected to combine advanced material development with scalable manufacturing on a single platform.

Exus Renewables North America, an independent owner, developer, and operator of utility-scale renewable energy projects, acquired Ozone Renewables, a U.S.-based renewable company. With this acquisition, Exus added new projects and expertise to its greenfield development team, as well as a pipeline of early-stage projects. This also marks the company’s first organizational acquisition.

For reports and trackers on funding and M&A transactions in solar, energy storage, and smart grid sectors, click here.

Read last week’s funding roundup.

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