Last updated September 10, 2026
EcoFlow DELTA Pro Review
3.6kWh, 3,600W output, expandable to 25kWh — a battery that behaves like a generator.
The verdict
The DELTA Pro is the battery station that crosses into real home-backup territory: 3,600W output starts and runs nearly any household appliance, capacity expands with extra batteries, and it can tie into a transfer switch through EcoFlow's ecosystem. Silent, indoor-safe, solar-chargeable — the strongest single answer to 'can a battery replace my generator?' (Answer: for 1–2 days, yes.)
$1,899on Amazon
Price as of Sep 23, 12:32 AM ET — subject to change.
What we like
- +3,600W continuous (7,200W surge) runs almost anything, including most well pumps
- +3.6kWh base, expandable to 25kWh with extra batteries
- +1,600W max solar input — genuinely fast off-grid recharging
- +Charges 0–80% in under an hour from a wall outlet
- +Silent, no fumes, safe indoors — runs in the living room during a storm
What to know
- −99 lb — wheeled, but stairs are an event
- −Serious money once you add batteries or solar
- −Long outages still favor fuel: 3.6kWh is ~1 day of frugal essential use
Full review
The pitch for battery backup is quality of life: no 2 AM refueling in the rain, no carbon monoxide risk, no noise complaints — the thing sits in your kitchen running the fridge in complete silence. The DELTA Pro delivers that with enough output headroom (3,600W) that you don't have to think about what you plug in.
The strategy that makes it shine is hybrid: run the house's essentials on the battery, and recharge it — from solar panels, a car, or 90 minutes of running a small generator — once a day. That turns a loud 12-hour-a-day generator problem into a quiet 90-minute one, and it's our favorite backup architecture for suburban homes.
Straight up against a $1,000 dual-fuel portable for week-long outage endurance, fuel still wins on capacity per dollar. This isn't cheaper — it's better to live with.
Best for: Homeowners who want silent indoor backup for essentials, especially paired with solar or a small generator.
Specifications
| Capacity | 3,600Wh (LFP, expandable to 25kWh) |
|---|---|
| AC output | 3,600W continuous / 7,200W surge |
| Outlets | 5× AC incl. 30A, USB-C 100W, 12V |
| Solar input | Up to 1,600W |
| Wall charge | 0–80% in ~1 hr |
| Cycle life | 6,500 cycles to 50% / 3,500 to 80% |
| Weight | 99 lb |
| Warranty | 5 years |
Ready to get one?
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$1,899on Amazon
Price as of Sep 23, 12:32 AM ET — subject to change.
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