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 23% conversion rate a Comprehensive warranties: DELTA 3 Plus includes a 5-year warranty and 12 months for the 400W Portable Solar Panel.