DELTA Max Portable Power Station expands up to 6kWh with smart extra batteries, keeping your home powered on in any emergency. Rapid dual charging Charge up from 0-80% in 65 minutes. Or get up to 3400W speeds by combining AC charging and the EcoFlow Smart Generator. Use DELTA Max as a solar powered generator for your home by powering appliances and tools on renewable energy. Rigorously tested by our expertly trained engineers, reconditioned EcoFlow units offer you a like-new portable power station experience with significant savings.