Bluetti Apex 300 Portable Power Station The built-in display keeps tabs on performance and remaining capacity. Bluetti Apex 300 key featuresSturdy covers protect outlets when not in use. Bluetti Apex 300 as home backupThe B300K expansion battery easily attaches to add power storage. When installed in the home, the Bluetti Apex 300 acts as an uninterruptible power supply (UPS) with a 0ms delay and 50A, 12,000W pass-through. Stan HoraczekIn order to max out capacity, the Apex 300 requires daisy-chaining several Apex 300 main units and extra batteries together.