VITA 550 portable power station uses a LiFePO4 Battery, which is durable for over 3000 cycles of charges and discharges. With a 538Wh capacity battery and 11 Outlets(3x600W AC Output), the VITA 550 power station can charge up to 11 devices at once. With the Watt+ feature, VITA 550 solar generator could enable high-powered devices below 1050W to operate. Three charging methods are supported, including wall charging (from 0%-100% in 1.6 hours),solar charging (2.5 Hours) and car charging. This solar generator is Equipped with Battery Management System (BMS) and Emergency Power Supply (EPS) function, protecting your device at all times. VITA 550 weighs only 8.16 kg and has an ergonomic handle so you can carry it easily. You can monitor and control 550 solar generator remotely via the MyGro APP. Within 24 months from the date of purchase, we will provide a replacement service for all quality-related issues.