- Expandable 1-5 kWh capacity with DELTA 3 Extra Battery, DELTA Pro Extra Battery, DELTA 2 Extra Battery, or DELTA 2 Max Extra Battery. - 1800W AC output, with 2400W (3600W surge) using X-Boost technology. - 5 fast recharging methods: AC, Solar, 800W Alternator Charger, Smart Generator 3000 (Dual Fuel), and Multi-charging. - 5-year warranty. Industry-leading portable power station with the fastest charging speed. The EcoFlow Delta 3 is a compact & lightweight portable power station that charges from 0-100% in 56 minutes. It supports 99% of household devices, including refrigerators, TVs, and computers. Perfect for home usage, RV, and outdoor usage, this battery ensures you're never left in the dark.