VRFB's large potential capacity may be best-suited to buffer the irregular output of utitlity-scale wind and solar systems.

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Their reduced self-discharge makes them potentially appropriate in applications that require long-term battery storage with little maintenance as in military equipment, such as the sensor components of the GATOR mine system.

They feature rapid response times well suited to uninterruptible power supply (UPS) applications, where they can replace lead–acid batteries or diesel generators. Fast response time is also appropriate for frequency regulation. These capabilities make VRFB's an effective "all-in-one" solution for microgrids, frequency regulation and load shifting.