Best Power Station for Whole-Home Backup

EcoFlow EcoFlow Delta Pro 3

The EcoFlow Delta Pro 3 ($2,500–$3,500) is our top pick for this use case. It delivers 4,000Wh of LiFePO4 battery capacity with a 4,000W continuous inverter (8,000W peak). At 114 lbs with 2.7 hours to full wall charging, it strikes the right balance of power, portability, and price. The serious home backup option. Connects to your breaker panel with transfer switch kit for true whole-home power.

EcoFlow Delta Pro 3

Key Specifications

Battery Capacity4,000Wh
Continuous Output4,000W
Peak Output8,000W
Battery TypeLiFePO4
Weight114 lbs
Charge Time2.7 hours to full
Output Ports13 ports
Price Range$2,500–$3,500
9/10

Our Verdict

Best whole-home backup. 4,000Wh with 4,000W output connects directly to your breaker panel via transfer switch. Expandable to 48kWh.

Pros

  • +4,000W continuous output (8,000W peak)
  • +120V/240V output — runs everything including dryers
  • +Expandable to 48kWh with daisy-chained batteries
  • +Transfer switch compatible for hardwired home backup

Cons

  • -114 lbs — not portable, this stays in one place
  • -$2,500+ starting price before accessories
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