With an output of up to 3400W . the EcoFlow DELTA 2 Max Solar Generator uses X-Boost proprietary technology to be able to run multiple appliances. With this amount of power . you can easily connect it to a transfer switch as a 120V home backup power solution. Its design includes an expansion capability that allows you to add external batteries and triple the capacity from 2kWh to 6kWh. You also enjoy fast recharging that takes the Solar Generator to 80% in approximately 43 minutes . and the LFP battery offers 3000 complete cycles till it’s down to 80% capacity. Count Per Pack 1.