EcoFlow DELTA Pro Review: The Home Backup King
✅ What We Like
- 3600Wh runs essentials for days
- Expands to 25kWh with extra batteries
- 3600W output powers most of a house
- EV charging option is a game-changer
❌ What Could Be Better
- 99 pounds requires wheels always
- Expensive, even before expansion batteries
- Overkill if you just want phone charging
The Hurricane That Didn’t Win
Rebecca lives in a suburb of Houston, about 20 miles inland. Hurricane season is just part of life there—you board up, you evacuate if you have to, and you hope the power comes back within a week.
Last September, Hurricane Margot had other ideas. Category 3 at landfall, 85 mph sustained winds in Rebecca’s neighborhood. The power went out at 2 AM on a Wednesday.
By Thursday afternoon, most of her neighbors were running on fumes. Gas stations had lines around the block. Generators were drinking fuel like it was free. One guy down the street had already run out of propane.
Rebecca? She was watching Netflix.
Her DELTA Pro sat in the garage, connected to a transfer switch she’d had an electrician install. It ran her refrigerator, her router, her TV, a few lamps, and her phone chargers. At night, she’d add the furnace fan for a few hours to take the edge off.
“We had ice cream,” she told me. “Melted ice cream. My neighbor was eating canned beans by candlelight, and we had ice cream.”
By Saturday—three and a half days in—the power came back. The DELTA Pro was at 22%. She’d never needed the expansion battery sitting next to it.
“I bought it for peace of mind,” she said. “Turns out, peace of mind tastes like chocolate chip cookie dough.”
The Numbers
| Spec | Value |
|---|---|
| Capacity | 3600Wh (expandable to 25kWh) |
| AC Output | 3600W continuous (7200W surge) |
| Weight | 99 lbs |
| Battery Type | LiFePO4 |
| Full Charge Time | ~2.7 hours (6500W MultiCharge) |
| Solar Input | 1600W max |
| Outlets | 5 AC, 4 USB-A, 2 USB-C, DC car port, AC wall outlet |
| Expandable | Yes, up to 2 DELTA Pro Extra Batteries + Smart Home Panel |
| EV Charging | Yes, via EV adapter |
| Warranty | 5 years |
What We Liked
3600Wh is serious capacity. This isn’t a “charge your phone” device. This is “run your fridge for 24 hours” capacity. Add the Wi-Fi router and some lights, and you’re looking at real home backup.
It expands to 25kWh. The DELTA Pro Extra Battery adds another 3600Wh. You can connect two of them, plus use the Smart Home Panel to chain multiple Pros together. The theoretical limit is 25kWh—enough to run an average house for a day or two.
3600W output is genuinely useful. Most “portable” power stations cap out around 1500-2000W. The DELTA Pro delivers 3600W continuous. That’s enough for a microwave, a space heater, a window AC unit, or multiple appliances simultaneously.
EV charging is a killer feature. With the optional EV adapter, you can charge your electric vehicle from the DELTA Pro—or charge the DELTA Pro from an EV. It’s not fast charging, but in an emergency, getting 10-15 miles of range back could matter.
1600W solar input. In good sun, you can add significant power during the day. Not enough to run a house indefinitely, but enough to extend your runtime meaningfully.
What Could Be Better
99 pounds is a commitment. This thing has wheels and a telescoping handle for a reason. You’re not carrying it anywhere. Setting it up is a two-person job if you need to move it more than a few feet.
The price tag is just the beginning. $1,899 gets you the base unit. Want expansion batteries? That’s another $1,500 each. Transfer switch installation? Another $500-1,000. A full setup can easily hit $5,000.
You need an electrician for the full experience. The Smart Home Panel that lets you power hardwired circuits requires professional installation. It’s not plug-and-play.
What Can It Run?
| Device | Runtime (Base Unit Only) |
|---|---|
| Smartphone (15W) | 200+ charges |
| Laptop (50W) | ~60 hours |
| CPAP without humidifier (40W) | ~75 hours |
| CPAP with humidifier (90W) | ~33 hours |
| 65” LED TV (120W) | ~25 hours |
| Refrigerator (150W avg) | ~20 hours |
| Window AC 5000 BTU (500W avg) | ~6 hours |
| Microwave 1000W (1500W input) | ~2 hours |
| Space heater low (750W) | ~4 hours |
| Space heater high (1500W) | ~2 hours |
Who Should Buy This
Anyone who’s lost power for more than 24 hours. If you’ve ever thrown away $200 of groceries after an outage, you understand the value proposition. The DELTA Pro pays for itself in 2-3 extended outages.
People in hurricane/tornado/wildfire zones. If your power goes out regularly and for extended periods, this isn’t optional equipment. It’s insurance.
EV owners. The bidirectional charging is unique. Being able to pull power from your car in an emergency—or give your car a few miles of range when it matters—is genuinely useful.
Off-grid or semi-off-grid homes. The DELTA Pro can serve as a legitimate power source for cabins, tiny homes, or anywhere the grid is unreliable.
Who should look elsewhere: If you just need to charge phones on camping trips, this is comical overkill. If you want something portable, get a RIVER 2. If you need whole-home power for a week, look at the DELTA Pro Ultra or a traditional generator.
The Verdict
The DELTA Pro is what happens when a company takes “portable power” seriously. It’s not actually that portable—99 pounds sees to that—but it’s powerful enough to matter during real emergencies.
Rebecca in Houston had ice cream while her neighbor ate cold beans. That’s not just convenience. That’s quality of life. That’s the difference between “surviving” an outage and just… living through it.
Is it expensive? Yes. Is it overkill for most people? Probably. But if you’ve ever sat in the dark for three days wondering when the lights would come back on, the price starts to make a lot more sense.
Rating: 4.9/5 — Loses half a point for requiring an electrician for the full experience. Otherwise, it’s as close to perfect as this category gets.