Initial capacity : 3.84 kWh (3840 Wh) , which is more than enough to meet the basic needs of an average family during a power outage.Battery type : Safe and durable LiFePO4 (LFP) chemistry that retains 80% of its initial capacity even after more than 3,000 charge cycles (approximately 10 years of daily use).Fast charging : Charges from 0 to 80% in just 1.5 hours from a standard AC outlet