Best for: Whole-home backup without a permanent install
Standout: 4,000W with 120V and 240V output
Watch out: About 115 lb and a high price
Not for: Camping or anyone who needs to carry it
The EcoFlow DELTA Pro 3 is a 4,096Wh power station on wheels with 4,000W of output at both 120V and 240V. It can expand to 48kWh and connect to your home through a transfer switch. It sells for about $2,700 to $3,200.
What you need before you buy
A transfer switch or EcoFlow Smart Home Panel installed by an electrician, if you want to power home circuits directly.
Garage or utility-room space: it weighs about 115 lb.
Optional solar or extra batteries for longer outages.
What it can power
Essential home circuits, including 240V loads like a well pump, for a day or more, and a fridge, Wi-Fi and lights for several days. Try our battery backup calculator with your own devices.
How I researched this: EcoFlow’s DELTA Pro 3 product page and specs, the Amazon listing, and a video review from The Electric Viking. Prices checked October 30, 2026.
EcoFlow DELTA Pro 3
The EcoFlow DELTA Pro 3 brings 4,096Wh, 4,000W and 240V output on wheels, expandable to 48kWh. Here is who needs it.
Product Brand:
EcoFlow
Editor's Rating: 4.5
Pros
4,096Wh LFP battery, expandable to 48kWh
4,000W output with both 120V and 240V, so it can run 240V appliances like a well pump
10 ms UPS switchover
Quiet operation from about 30 dB
Wheels and a handle make the 115 lb unit movable
Cons
About 115 lb, so it is not truly portable
Whole-home use needs a transfer switch or EcoFlow Smart Home Panel and an electrician
Expensive up front
Big expansion setups add a lot of cost
Specs
Capacity
4,096Wh, expandable to 48kWh
Battery
LiFePO4 (LFP)
AC output
4,000W (6,000W X-Boost), 120V and 240V
UPS
About 10 ms switchover
Noise
As low as 30 dB
Home connection
Transfer switch or EcoFlow Smart Home Panel (electrician needed)
App
EcoFlow app
Weight
About 115 lb (on wheels)
Verdict
The DELTA Pro 3 is the closest thing to a home battery you can roll into the garage: 4kWh, 4,000W and 240V output. Pair it with a transfer switch for real whole-home backup; for lighter needs, the DELTA 2 Max costs far less.
It can run your essential circuits, including 240V loads, when connected through a transfer switch or EcoFlow Smart Home Panel installed by an electrician.
How long will it last in an outage?
With a fridge, Wi-Fi, lights and some cooking, one 4kWh unit usually lasts one to two days; extra batteries extend that.
Can I move it?
Yes, it has wheels and a handle, but at about 115 lb it is meant to stay in a garage or utility room.
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