BLUETTI B300S Expansion Battery | 3072Wh ( Only Works With AC500 ), B300S | 3072Wh Expansion Battery / T500 500W Adapter

Meet the BLUETTI B300S Expansion Battery, a 3072Wh powerhouse designed to grow the AC500 system. This expansion pack slots neatly into the AC500, instantly boosting your available energy for longer outages, remote job sites, or off-grid adventures. With a dedicated interface, the B300S lets you scale total capacity without sacrificing performance, so you can run essentials—coffee makers, fridges, power tools, laptops—through multiple days. When paired with the T500 500W adapter and the AC500, charging is efficient and straightforward, keeping batteries balanced and ready. Built for reliability, the B300S is a quiet, high-capacity companion for home backup, camping, or work sites where access to mains is unreliable. It’s a practical upgrade that turns the AC500 into a true expandable power station. Requires the AC500 base unit to operate.