EcoFlow DELTA Pro 3 Portable Power Station (UL9540 Certificated)

This is EcoFlow's flagship home backup unit — UL9540 certified, built to scale from a single day of backup power up to a full week, expandable from 4kWh all the way to 48kWh. It delivers both 120V and 240V output at up to 4,000W from a single unit, enough to run a 3-ton central AC alongside everything else that matters, and its X-Boost technology can push output up to 6,000W when you need the extra headroom.

It doesn't cut corners on stability either — you get a steady, uninterrupted 4,000W of continuous output even while it's charging, so you're never choosing between topping off and keeping the lights on. Pair it with the EcoFlow Smart Generator 4000 and it'll auto-recharge on its own when connected, giving you a real path to indefinite backup power, not just a few days.

Recharging on its own is fast too — 80% in just 50 minutes, whether you're charging from solar, your car, or a wall outlet. And the LFP battery holds up: 80% capacity retention even after 4,000 charge cycles. It's built to be moved around as well, with wide wheels and an ergonomic handle on a compact design that works just as well for RVs and off-grid setups as it does for a house.

One thing worth flagging for anyone pairing this with the Smart Home Panel 2: that requires professional installation before use, and the cost depends on an on-site assessment — the bundled "DELTA Pro 3 + Smart Home Panel 2 + Installation" package includes that install service, but a standalone unit does not.

Key specs: expandable 4–48kWh capacity (1 day to 1 week of backup); 120V/240V output, 4,000W continuous, up to 6,000W with X-Boost; stable output while charging (pass-through); auto-recharges with EcoFlow Smart Generator 4000; retains 80% capacity after 4,000 cycles; charges to 80% in 50 minutes via solar, car, or outlet; UL9540 certified.