a Expandable capacity: 1-5kWh expandable capacity to fit your energy storage needs. Ideal for home backup, RVing, outdoors or even everyday use. a Built to last 6x; longer: Get 10 years of daily use until hitting 80% of its original capacity. That&&';;s down to its LFP battery chemistry giving you 3000+ cycles. a Huge AC output: With X-Boost mode get up to 2200W output power to run 99% of home appliances. a Capture more energy: 99% MPPT efficiency maximizes solar generation anytime. a Up to 25% conversion with a unique bifacial design to guarantee a fast solar charging speed a Comprehensive warranties: DELTA 3 Plus includes a 5-year warranty and 12 months for the NextGen 220W Bifacial Portable Solar Panel. *DELTA 3 Plus and NextGen 220W Bifacial Portable Solar Panel will be shipped separately. Shipment services to Alaska, Puerto Rico, and Hawaii aree temporarily suspended.