DELTA 2 MAX PORTABLE POWER STATIONDESCRIPTION Expandable capacity 2 6kWh expandable capacity to fit your energy storage needs. Add up to two DELTA 2 Max Smart Extra Batteries to hit a capacity of 6144Wh. Ideal for home backup, RVing, outdoors or even everyday use. Built to last 6 longer Get 10 years of daily use until hitting 80% of its original capacity. Thats down to its LFP battery chemistry giving you 3000+ cycles. Huge AC output With X Boost mode get up to 3400W output power to