The Apollo 5K Expansion Battery is a high-capacity 5,376 Wh LiFePO₄ battery designed to seamlessly expand the Hysolis Apollo 5K power system. Built for long-term performance, it delivers 6,000+ life cycles and integrates directly into the Hysolis ecosystem for easy, reliable capacity expansion.

Each expansion battery features its own integrated BMS and can operate as a standalone power source, compatible with solar, wind, AC, and DC charging. Stack up to three expansion batteries on Apollo wheels, combine one expansion battery with one Apollo unit, or connect additional batteries alongside the system using the included cable. With support for up to five expansion batteries per Apollo, the Apollo 5K Expansion Battery provides flexible, scalable energy storage for backup power, off-grid use, and renewable energy systems.