By Battery Power Online Staff
October 3, 2025 | Funding rounds from the past month in the battery space show investments for geothermal energy (including from automotive manufacturers), BESS solutions, solar energy storage, and AI-driven energy trading.
$38M: Series A for Geothermal Energy
Rodatherm, a pioneer in next-generation geothermal energy, has successfully closed an oversubscribed $38 million Series A funding round. This is the largest first venture raise for a geothermal startup of all time, underscoring the booming industry and ground-breaking technology Rodatherm has developed. The financing was led by Evok Innovations and included participation from TDK Ventures, Toyota Ventures, TechEnergy Ventures, MCJ, Active Impact Investments, Renewal Funds, Grantham Foundation for the Protection of the Environment, Giga Investments, and others. Operating in stealth since 2022 and with operations in both Calgary, Alberta, Canada, and Salt Lake City, Utah, Rodatherm has developed a novel fully cased, pressurized, closed-loop geothermal system that is optimized for hot sedimentary basins, enabling both conductive and convective heat transfer from the reservoir. Read more.
$22.4M: Series B for BESS Solutions
Sympower, Europe’s leading independent flexibility services provider, has secured €19 million in funding from pension investor PGGM, investing on behalf of PFZW, the Dutch health care pension scheme. Sympower will use the funds to further roll out its battery storage (BESS) optimization solutions and pursue additional mergers and acquisitions. This investment is an extension of Sympower’s Series B1 funding, bringing the total round to €42 million. With over 2.7GW of flexible distributed energy assets under management across Europe, Sympower has established itself as a market leader in energy flexibility. This latest investment marks a pivotal step in scaling the company’s presence in BESS, expanding its acquisition pipeline, and advancing its pan-European growth. The funding will enable Sympower to build on its track record with grid-scale battery projects in Sweden and Finland and extend its capabilities to play a central role in Europe’s evolving flexibility ecosystem. Read more.
$9.8M: Series B for Solar and Battery Storage in Latin America
SunCompany, a Colombian cleantech startup formerly known as SunColumbia, has raised more than $15 million to accelerate its solar and battery storage projects in Latin America. The financing round includes $9.8 million in Series B equity and $5 million in debt, with support from Bancolombia Ventures and SEAF. Founded by Juan Diego Gómez and Mauricio Hoyos, SunCompany has evolved into a holding group that oversees subsidiaries like Dispower and Sunwa Technologies. The company focuses on delivering hybrid solar and storage solutions, with operations in Colombia, the Dominican Republic, and Guyana. To date, SunCompany has installed 57.6 MW of solar power and 58.3 MWh of storage systems, strengthening its role as a regional player in clean energy infrastructure. Read more.
$9.4M: Series A for AI-Driven Energy Trading
suena energy, one of InnoEnergy’s portfolio companies and a pioneer in the algorithmic optimization and trading of energy storage systems and renewable energies, has successfully secured an €8 million in Series A funding. Dutch energy company Eneco led the round through its investment arm, Eneco Ventures, joined by impact venture capital fund 4impact capital, and existing investors InnoEnergy, J.O.S.S., Santander and Energie 360°. suena energy’s proprietary Energy Trading Autopilot enables fully automated, AI-driven trading of flexibilities across all relevant power and ancillary service markets. The platform uses real-time data and forecasts to generate optimal dispatch schedules, maximizing revenues while minimizing risk and battery degradation. Read more.
