On December 8, 2025, Amazon took a leading role in an $81 million Series D funding round for Blue Current, a U.S.-based startup specializing in the development of advanced silicon solid-state batteries. These next-generation batteries are poised to deliver significant improvements in energy density and charging speed compared to conventional lithium-ion technology, making them an attractive option for both electric vehicles (EVs) and stationary energy storage systems. As part of the investment, Amazon’s Senior Vice President James Hamilton will join Blue Current’s board, helping guide the company’s efforts toward commercializing its groundbreaking battery technology.
The funding round brings together a variety of prominent industrial investors, including Koch Industries’ venture arm and Allen & Company. This diverse group of investors highlights the growing interest in energy storage innovation, especially in light of the rapidly expanding electric vehicle market. Amazon’s involvement is particularly strategic, given its commitment to scaling up its electric delivery fleet. The company has set a goal to operate 100,000 electric delivery vehicles by 2030, and Blue Current’s batteries could play a key role in achieving that ambitious target. By investing in next-generation battery technology, Amazon is positioning itself to support the continued growth of its EV fleet while advancing sustainability initiatives.
In addition to supporting EVs, Blue Current’s batteries are also designed to meet the growing demand for stationary storage solutions. One of the most pressing challenges for industries reliant on renewable energy sources, such as solar and wind, is the need for efficient and scalable energy storage systems. Blue Current’s solid-state batteries could provide an ideal solution for storing excess energy for use during periods of high demand or when renewable energy production is low. These batteries also have potential applications in data-center backups, where reliable and efficient energy storage is critical to ensuring uninterrupted service.
Although the funding round was closed earlier in September, its public disclosure this week underscores the continued interest from investors in domestic energy storage innovation, despite broader challenges in the climate-tech funding space. The deal illustrates the ongoing drive to advance technologies that can help mitigate the impacts of climate change, enhance energy security, and support the transition to cleaner energy sources.
The investment in Blue Current is just the latest example of how major companies like Amazon are actively contributing to the growth of sustainable technologies. As the world transitions to cleaner energy solutions, innovations in energy storage are becoming increasingly vital. With support from high-profile investors and companies, Blue Current is positioned to play a crucial role in shaping the future of energy storage technology, offering solutions that could transform both the electric vehicle industry and stationary energy markets.