Product images: EcoFlow official store
EcoFlow · Portable power station
EcoFlow DELTA 3 Max
2kWh of LiFePO4 with a 10 ms UPS at a 1kWh-class price
WattLab Score
How good it is for its size · method
- 2,048 WhCapacity
- 2,400 W / 4,800 WAC continuous / surge
- 44.8 lbWeight
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Overview
The DELTA 3 Max packs 2,048Wh of LiFePO4 and a 2,400W inverter (4,800W surge, 3,400W X-Boost) into a 44.8 lb box. It refills 0–80% from the wall in 68 minutes, switches to battery in 10 ms and runs at 25 dB.
Ideal for
Households that want a 2kWh outage battery for a fridge, Wi-Fi, lights and a home office, with a UPS fast enough for computers.
Skip it if
Off-grid users who rely on solar, since 500W input is slow for 2kWh, or anyone who wants to add batteries later (look at the Max Plus).
Editor's ratings · 0–10
Score profile
Seven axes on fixed scales, so scores compare directly across every model on WattLab Review.
What's inside the 7.3 WattLab Score
- Charging speed—
- Battery technology6.0
- Energy density (Wh/lb)8.5
- Solar refill speed3.9
- Value (Wh per $)8.9
- Versatility (ports & features)9.2
How long will it run?
Estimated runtimes on a full charge for common devices.
| Device | Typical load | Estimated runtime |
|---|---|---|
| Smartphone charge | 15 Wh each | ~116 charges |
| Wi-Fi router + modem | 15 W | ~116 hr |
| CPAP (no humidifier) | 40 W | ~44 hr |
| Laptop | 60 W | ~29 hr |
| 12V camping fridge (avg) | 35 W | ~50 hr |
| 32" LED TV | 50 W | ~35 hr |
| Full-size fridge (avg) | 150 W | ~12 hr |
| Coffee maker | 1,000 W | ~1.7 hr |
Estimates use 85% of rated capacity to account for inverter losses. Real runtimes vary with temperature, battery age and how often appliances cycle.
Full specifications
Battery
| Capacity | 2,048 Wh |
|---|---|
| Battery chemistry | LiFePO4 |
| Rated cycle life | — |
Output
| AC output (continuous) | 2,400 W |
|---|---|
| Surge / peak | 4,800 W |
| Power Lifting (resistive loads) | — |
| AC outlets (120V, pure sine) | 4 |
| USB-C ports | 3 |
| Max USB-C output | 100 W |
| USB-A ports | 1 |
| 12V car outlet | 12V / 10A (126W) |
| DC5521 barrel ports | 0 |
Charging
| Max AC charging input | 1,800 W |
|---|---|
| AC charge time (standard) | — |
| Fastest full charge | — |
| Max solar input | 500 W |
| Solar input spec | XT60 input, 500W max |
| Solar charge time | — |
| Car charge time | — |
Size & build
| Weight | 44.8 lb (20.3 kg) |
|---|---|
| Dimensions | 19.4 × 9.4 × 12.0 in (H × W × D) |
| Rated noise | ≤25 dB |
| Charging temperature | 32–113°F (0–45°C) |
| Discharge temperature | 14–113°F (-10–45°C) |
Smart features & warranty
| UPS switchover | ≤10 ms |
|---|---|
| App control | EcoFlow app (Wi-Fi + Bluetooth) |
| Expandable battery | — |
| Warranty | 5 years |
Value
| Reference price* | $879.00 |
|---|---|
| Wh per dollar* | 2.33 Wh/$ |
Other details
| X-Boost | Runs resistive appliances up to 3,400W |
|---|---|
| Battery | 51.2V / 40Ah |
| USB-C detail | 1 × 100W + 2 × 30W (30W shared) |
| AC charging input | 100–120V~ 15A, 1,800W |
| Noise detail | ≤25 dB at 600W (EcoFlow, measured at 1 m) |
| Expansion | EcoFlow lists extra-battery expansion for the DELTA 3 Max Plus; the DELTA 3 Max has an XT60 port only, so EcoFlow notes some Plus features are unavailable |
| Warranty detail | 3 years + 2 more with EcoFlow app registration |
- Fast charging: 0–80% in 68 minutes from a wall outlet with X-Stream fast charging (EcoFlow figure); EcoFlow doesn't publish a 0–100% time.
- Solar time: EcoFlow solar panels sold separately.
- Cycle life: EcoFlow rates the pack for about 10 years of use but doesn't publish a cycle count for the DELTA 3 Max.
- * Reference price from the manufacturer's US store on the date shown. Amazon's price may be different.
- — means the manufacturer doesn't publish that figure. We never estimate missing specs.
EcoFlow DELTA 3 Max
See today's price and availability on Amazon.com
Our take
Two kilowatt-hours is the point where a power station starts to feel like a small home battery. The DELTA 3 Max can keep a typical refrigerator cycling for roughly 12–18 hours, run a CPAP for five nights or more, or carry a home office through a full workday outage. Its 2,400W pure sine wave inverter handles microwaves, coffee makers and many power tools, and EcoFlow's X-Boost mode lets resistive loads like kettles and heaters run up to 3,400W at reduced voltage.
As a backup it behaves well. EcoFlow quotes a switchover under 10 ms, fast enough for desktop PCs, NAS boxes and network gear. The app adds Storm Guard, which tops up the battery before severe weather, plus scheduled charging for time-of-use rates. At 25 dB under a 600W load it's quiet enough for a bedroom.
Recharging is fast: 1,800W from a standard 120V outlet takes it from 0 to 80% in 68 minutes. Solar input is more modest at 500W through a single XT60 port, so a full solar refill takes most of a sunny day. That's the main compromise of this model, along with ports. You get four AC outlets, one 100W USB-C plus two 30W USB-C, one USB-A and a 12V car socket, which covers most needs but isn't generous for the class.
Know which model you're buying. The DELTA 3 Max Plus costs more and adds 3,000W output, faster solar and battery expansion. For most households that want an affordable 2kWh LiFePO4 backup with a fast UPS, the standard Max is the better value.
Pros
- 2,048Wh LiFePO4 for well under $1,000 at EcoFlow's current price
- 2,400W continuous, 4,800W surge and 3,400W X-Boost
- 10 ms UPS switchover and a quiet 25 dB
- 0–80% from the wall in 68 minutes
- Storm Guard and scheduling in the EcoFlow app
Cons
- Solar input tops out at 500W
- Expansion batteries are a Max Plus feature, not this model
- Only one USB-A and one 100W USB-C port
- 44.8 lb with no wheels
What owners and reviewers say
Independent reviews
AppleInsider's hands-on review of the closely related DELTA 3 Max Plus confirmed it charged to 80% within about an hour, in line with EcoFlow's claims. We haven't yet found an independent test of the standard DELTA 3 Max itself. We'll add Amazon buyer feedback themes once we can verify them.
Compare it head-to-head
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BLUETTI
BLUETTI Elite 30 V2
The pocket-sized LiFePO4 pick with a real 600W inverter
- 288 WhCapacity
- 600 WAC output
- LiFePO4Battery
- 9.48 lbWeight
$289.99reference price*
Jackery
Jackery Explorer 1000 v2
The 1kWh sweet spot for home backup that still fits in a car trunk
- 1,070 WhCapacity
- 1,500 WAC output
- LiFePO4Battery
- 23.8 lbWeight
$559.00reference price*
Jackery
Jackery Explorer 300
The proven ultralight for cameras, drones and weekend camping
- 293 WhCapacity
- 300 WAC output
- Li-ion (NMC)Battery
- 7.1 lbWeight
$289.00reference price*
Articles featuring the EcoFlow DELTA 3 Max
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Ready to decide?
EcoFlow DELTA 3 Max on Amazon.com