Flow Battery Market: Powering the Long-Duration Energy Storage Revolution The global Flow Battery Market size was valued at USD 1.59 billion in 2025 and is expected to grow at a CAGR of 22.3% from 2026 to 2034, according to Polaris Market Research. The market is projected to reach USD 1.94 billion in 2026 and expand substantially to USD 9.71 billion by 2034, reflecting the...